Downloaded 58 times
![C Previous Page
A
Installation 7Maintenance
Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS
B F
725.3(B); 760.3(A); 770.3(A); 800.52(B); You asked specifically about ple- Q: I was reviewing the discussion on the
820.3; 830(A)] only address the “acces- num spaces, but the same text applies BICSI Public Forum about laying cables
sible portion” of an abandoned cable to plenum, riser, and hollow spaces in parallel to each other in a fi xed physical
as “not be permitted to remain.” Arti- the building. If it is “abandoned” and relationship. I noticed that one comment
cle 100 defines “Accessible (as applied to “accessible,” take it out. said that the European norm addresses
wiring methods)” as “Capable of being Seven definitions for almost the same it to some degree. Do you know if any
removed or exposed without damag- term is a lot, even for the NFPA. So, for of the U.S. standards have intentions to
ing the building structure or finish or NEC 2005 the International Brother- address it? I have a client in New Jersey,
not permanently closed in by the struc- hood of Electrical Workers Codes and with a large data center, that is asking
ture or fi nish of the building.” … So, Standards Committee is proposing to me for input. At present they are laying
this is not a surgical removal in a fin- delete the current seven to add a new large bundles of cables into cable trays
ished space. But if the entire area of the definition to Article 100, which would and they want the cables combed as they
building is undergoing demolition for read: “Abandoned Cable. Installed are installed. I told them I would check
remodeling, then all of the cable should cable that is not terminated at both and let them know.
be accessible and removed. ends at equipment and not identified for Bobby Ashton, Jr.,
And then there is Article 645—the future use with a tag.” But so far the RCDD/LAN Specialist
one that did not bother to uniquely other “stakeholders,” who carefully South Windsor, CT
define “abandoned cable,” which is crafted the various definitions in their
only concerned with abandoned cable respective Articles, are not supportive A: Intentions, yes. At the TIA TR-42.1
that is not contained in metal raceway. of this “one-size-fits-all” approach. February 2002 meeting, a presentation
So, metal raceways full of dead cable It is going to be an interesting couple (TR 42.1-2002-013) was made, which ref-
under raised floors in data centers are of years. erenced a list of contributions, previously
not a concern? submitted to either the TR-42.7 Tele-
PANDUIT introduces the affordable and powerful COUGAR ™ LS9
Hand-Held Thermal Transfer Printer
■ Economical identification system provides premium quality solutions at the
lowest installed cost
■ Prints a wide variety of continuous tapes for marking of cables, patch
panels, faceplates and other network applications
■ Legends can be easily aligned with ports on patch panels and faceplates,
eliminating the need for manual spacing and guesswork
■ Cut-to-length functionality eliminates label waste and label trimming labor
■ Partial cut feature available to provide tear-apart strips of labels
■ P1 ™ Label Cassette contains integrated memory device for automatic
formatting, recall of last legend used, and number of labels remaining in
the cassette
■ Fast-loading label cassette includes both label material and ribbon to make
changing labels easy
PANDUIT offers a broad range of economical identification products that aid in
TIA/EIA-606-A compliance including labels, labeling software, and printers.
Visit us at www.panduit.com/p922
Contact Customer Service by email: cs@panduit.com
or by phone: 800-777-3300 and reference ad # p922
Cable Network Partial Cut Strip P1 ™ Label Cassette
Marking Components of Labels
C Previous Page
A
Installation 7Maintenance
Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS
B F](https://image.slidesharecdn.com/cim20070701jul2007-100708124901-phpapp01/85/Cim-20070701-jul_2007-12-320.jpg)
![C Previous Page
A
Installation 7Maintenance
Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS
B F
sources, regardless of the presence of an overall screen/shield. Antenna susceptibility:
At frequencies above 30 MHz, noise currents from the envi- UTP vs. ungrounded F/UTP
ronment cannot penetrate the screen/shield due to skin effects, 0
and the internal twisted pairs are fully immune to interfer-
-20
ence. Unfortunately, balance performance is no longer suffi-
cient to ensure adequate noise immunity for UTP cabling at -40
20 db gain
these higher frequencies. This can have an adverse impact on -60
the cabling system’s ability to maintain the SNR levels required
-80
by applications employing DSP technology.
The potential for a cable to behave as an antenna can be -100
experimentally verified by arranging two balanced cables in -120
series, injecting a signal into one cable to emulate a trans- 1 10 100
Frequency (MHz)
mit antenna across a swept frequency range, and measuring
* Data provided courtesy of NEXANS/Berk-Tek
the interference on an adjacent cable to emulate a receiving
antenna. As a rule of thumb, the higher the frequency of the Even when two F/UTP systems are left ungrounded, they still provide
noise source, the greater the potential for interference. The cou- a minimum of 20 dB better performance (blue) than two UTP cables
pling between two UTP cables is a minimum of 40 dB worse (black). [Data provided by Nexans/Berk-Tek.]
than the interaction between two properly grounded F/UTP
cables. It should be noted that 40 dB of margin corresponds to and especially above 30 MHz when cable balance starts to
100 times less voltage coupling, thus confirming the modeled significantly degrade;
predictions. The UTP cable radiates and receives—behaves like • Significantly increased Shannon Capacity for future
an antenna—substantially more than the F/UTP cable. applications.
A second antenna myth is that common mode signals
appearing on a screen or shield can only be dissipated through Fusion of the best
a low-impedance ground path. The fear is that an unground- Achievable SNR margin is dependent upon the combined prop-
ed screen will radiate signals that are “bouncing back and forth” erties of cabling balance and the common mode and differential
and “building up” over the screen/shield. In fact, left unground- mode noise immunity provided by screens and shields. Applica-
ed, a screen/shield will substantially attenuate higher-frequen- tions rely on positive SNR margin to ensure proper signal trans-
cy signals because of the low-pass fi lter formed by its resistance, mission and minimum BER. With the emergence of 10GBase-T,
distributed shunt capacitance, and series inductance. it has become clear that the noise isolation provided by good
The effects of leaving both ends of a foil twisted-pair balance alone is just barely sufficient to support transmission
cable ungrounded can also be verified by using the above- objectives. Furthermore, the alien crosstalk and noise immunity
mentioned experimental method. The coupling between two benefits provided by F/UTP and S/FTP cabling designs
UTP cables is still a minimum of 20 dB worse than the interac- have been demonstrated to offer almost double the Shannon
tion between two ungrounded F/UTP cables. (Note that 20 dB Capacity, a performance advantage that has caught the atten-
of margin corresponds to 10 times less voltage coupling.) Even tion of application developers and system specifiers alike.
under worst-case, ungrounded conditions, the UTP cable It is often said that the telecommunications industry has
behaves more like an antenna than the F/UTP cable. come full circle in the specification of its preferred media type.
Modeled and experimental results clearly dispel these an- In actuality, today’s screened and fully shielded cabling sys-
tenna myth. Screens and shields offer substantially improved tems represent a fusion of best features of the last two gener-
noise immunity compared to unshielded constructions above ations of LAN cabling: excellent balance to protect against
30 MHz, even when improperly grounded. low-frequency interference, and shielding to protect against
The performance benefits of using screened and fully high-frequency interference.
shielded systems include:
• Reduced pair-to-pair crosstalk in fully shielded designs; (Editor’s note: This article is derived from Valerie Rybinski’s
• Reduced alien crosstalk in screened and fully shielded white paper, “Screened and Shielded Cabling: Noise Immuni-
designs; ty, Grounding, and the Antenna Myth.” The paper contains in-
• Screened Category 6A cable diameters that are smaller formation used in this article, as well as a full explanation of
than many 6A UTP cables, allowing greater pathway fi ll/ the simplified loop antenna model, a complete bibliography of
utilization; Rybinski’s sources, and a glossary of terms and acronyms. The
• Substantially improved noise immunity at all frequencies, white paper is available at www.siemon.com.)
www.cable-install.com Cabling Installation & Maintenance ■ July 2007 ■ 23
C Previous Page
A
Installation 7Maintenance
Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS
B F](https://image.slidesharecdn.com/cim20070701jul2007-100708124901-phpapp01/85/Cim-20070701-jul_2007-25-320.jpg)
![C Previous Page
A
Installation 7Maintenance
Contents Zoom In Zoom Out Front Cover Search Issue B
Next Page EMaGS F
cable. If such wires exist, members should identify the wiring the local authority having jurisdiction.Though this author did
by its rating (riser rated “CMR,” plenum rated “CMP”) and its not get an on-the-record comment concerning enforcement
use (communications, alarm, security, etc.). The NEC 2002 and of abandoned-cable removal, some commented anonymously
2005 include language that allows some cabling to be retained that enforcement varies from jurisdiction to jurisdiction.
if it is tagged for future use as long as it meets the permitted
use criteria specified for cable installations (i.e., minimum of Words getting in the way?
“CMR” and/or “CMP”). Any cable that does not meet the per- One potential reason for such unpredictable enforcement could
mitted use specifications should be removed. be the sometimes-confounding wording within the NEC in
which abandoned cable is referenced. The 2002 NEC includes
Leasing language seven separate sections that mandate the cable’s removal, and
The BOMA paper continues: “Your leases should clearly state an accompanying seven individual sections that define the
that tenants must remove any cabling that is abandoned dur- term “abandoned cable.”
ing the term of their tenancy, and/or your license agreements The seven sections of NEC 2002 that contain the definitions
should require service providers to remove all wires upon the are: 640.2, 725.2, 760.2, 770.2, 800.2, 820.2, and 830.2. The
termination of the contract. We recommend that you review seven sections with the removal language are: 640.3, 725.3,
your leases and license agreements to ascertain exactly who 760.3, 770.3, 800.52, 820.3, and 830. The requirements for
was responsible for the installation and/or abandoning of the removal are worded essentially the same, as follows: “The ac-
cabling and whether you have recourse to recover any of the cessible portion of abandoned [application for which cables are
funds needed to remove the wire. Next, make any amend- used, or cable type] cables shall not be permitted to remain.”
ments necessary if you are not already protected by these Simply, the code-based requirements to remove abandoned
agreements.” cables are not going away. How quickly those abandoned
As BOMA pointed out to its membership, abandoned cable cables themselves are going away appears to depend on the
is a code issue within those jurisdictions that have adopted tenacity of building owners/managers, along with the enforce-
the 2002 or 2005 NEC. As such, it is subject to enforcement by ment procedures of the local AHJ.
____________
C Previous Page
A
Installation 7Maintenance
Contents Zoom In Zoom Out Front Cover Search Issue B
Next Page EMaGS F](https://image.slidesharecdn.com/cim20070701jul2007-100708124901-phpapp01/85/Cim-20070701-jul_2007-28-320.jpg)
![C Previous Page
A
Installation 7Maintenance
Contents Zoom In Zoom Out Front Cover Search Issue B
Next Page EMaGS F
are related to crosstalk between wire pairs in the cable and other cabling installation issues. IEEE 802.3an development
signal reflection on each wire pair measured by the return has been completed and was approved by it standards board
loss parameter. in June 2006.
Because of the very high frequency range required for The cabling industry is undertaking two sets of activities:
10GBase-T, the crosstalk requirements must be expanded to • Guidelines for cabling compliance with the transmission
include not only the crosstalk that happens between wire pairs requirements of 10GBase-T;
within each cabling link, but also to include the crosstalk that • A new cabling standard that delivers better transmission
is induced from wire pairs in adjacent cabling links. The lat- performance than Category 6, called Augmented Catego-
ter is called alien crosstalk. The performance of each individ- ry 6 (Category 6A) or Augmented Class E (abbreviated
ual cabling link is certified by the “in-channel” tests, while Class EA by the International Organization for Standard-
the alien crosstalk performance or the coupling between wire ization [ISO]).
pairs in adjacent links is to be certified by the “between-chan- In the North American market, the Telecommunications
Industry Association (TIA; www.tiaonline.org) is the lead-
UTP vs. screened UTP cable construction
ing standards body for data communications cabling. The ISO,
UTP STP meanwhile, develops, publishes, and maintains standards for
Conductor Conductor the worldwide market. Both standards bodies are involved
Insulation Insulation with the two activities mentioned above.
Pair Pair
Sheath Pair shield
Cabling guidelines for compliance with 10GBase-T
Sheath
The TIA published a document titled Telecommunications
Systems Bulletin 155 (TIA TSB-155), which contains the
S/UTP S/STP guidelines and performance criteria by which any cabling
Conductor Conductor
system can be evaluated for compliance with the cabling
Insulation Insulation transmission requirements for 10GBase-T. The guidelines
Pair Pair in TSB-155 address the in-channel performance (test
Shield Pair shield parameters that define the performance of an individual
Sheath Cable shield cabling link over the frequency range from 1 through
Sheath 500 MHz) and the between-channel performance
Source: Fluke Networks (signal coupling between adjacent links commonly referred
Adding a foil shield around the four pairs of Unshielded Twisted Pair to as alien crosstalk). The ISO is in the process of creating a
(UTP) creates Screened UTP (S/UTP). Wrapping a foil shield around Technical Report (TR 24750) that serves the same purpose,
each pair creates Shielded Twisted Pair (STP). Screened STP (S/STP) and intends to provide the same guidance as the TIA
adds a foil screen around all four shielded wire-pairs. TSB-155 document. (These guidelines do not suppose a
specific Category or Class of cabling, but it will be
nel” test parameters. difficult to meet the performance established by TSB-155
How can you be assured that the installed cabling system [TR 24750] for any cabling lower than Category 6 or Class E.)
will support 10GBase-T transmission? Industry standards
define the test parameters as well as the measurement method- New cabling standards
ology to assure compliance of installed cabling systems. This Both TIA and ISO are developing a new cabling type called
testing procedure is called cabling certification. Augmented Category 6 (Category 6A) or Augmented Class
E (Class EA). This new cabling will offer better performance
Applying the standards than Category 6 or Class E cabling. The performance of the
The IEEE has been the organization to develop, expand, and in-channel and between-channel parameters will be defined
maintain the “Ethernet” standards, in its 802.3 set of spec- up to 500 MHz. The standards activities that defi ne the Aug-
ifications. IEEE project 802.3an developed and defined the mented cabling systems are not yet complete, even though
system to transmit 10-GbE over twisted-pair cabling. This many manufacturers offer Category 6A (Class EA) solutions
project encompasses all aspects of the network implementation, in the market. The TIA development is further along than the
including the minimum capability of the cabling link between ISO development, and will be published as Addendum 10 to
a transmitting device and a receiving device. The IEEE is the TIA standard 568-B.2 (TIA-568-B.2-10). This TIA docu-
focused on the transmission performance of the end-to-end ment is, at the time of this writing, in Draft 7.0.
cabling link independent of the number of connections or An important reason for the new cabling systems is ➤
30 ■ July 2007 ■ Cabling Installation & Maintenance www.cable-install.com
C Previous Page
A
Installation 7Maintenance
Contents Zoom In Zoom Out Front Cover Search Issue B
Next Page EMaGS F](https://image.slidesharecdn.com/cim20070701jul2007-100708124901-phpapp01/85/Cim-20070701-jul_2007-32-320.jpg)
![C Previous Page
A
Installation 7Maintenance
Contents Zoom In Zoom Out Front Cover Search Issue B
Next Page EMaGS
F
P R E - T E R M I N AT E D ,
PRE-TESTED,
PRE-ANYONE ELSE.
PROVEN PERFORMANCE. PROVEN RELIABILITY. RAPIDNET. When it comes to pre-terminated network cabling
solutions, HellermannTyton is the leader. Pioneering the first Category 6 pre-terminated network cabling system,
HellermannTyton has, for years, delivered successful RapidNet installations across the globe – including leading US
data centers in government, financial, healthcare, educational and enterprise applications. RapidNet is available
in copper and fiber modular configurations and offers the time tested performance and reliability required
for system critical applications. Assuring on-time project completion in the most demanding circumstances,
RapidNet has been verified to reduce installation time by 85% over traditional methods.
RapidNet has been proven in the field, now let us prove to you how RapidNet can enhance your business. Go
online for more information and register for your free “Proven in the Field” t-shirt, www.hellermann.tyton.com/cm1
phone: [80 0] 822 4352
email: info@htamericas.com
w w w. h e l l e r m a n n .t y t o n . c o m /c m1
____________________
C Previous Page
A
Installation 7Maintenance
Contents Zoom In Zoom Out Front Cover Search Issue B
Next Page EMaGS
F](https://image.slidesharecdn.com/cim20070701jul2007-100708124901-phpapp01/85/Cim-20070701-jul_2007-38-320.jpg)
![C Previous Page
A
Installation 7Maintenance
Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS
B F
Big Green initiative that can reduce cabling costs; ing system.
continued from page 49 • Virtualize IT infrastructures, such as “Relief from the energy crisis can’t be
providing clients the IBM action plan to emerging hybrid systems that feature achieved through incremental improve-
make their data centers fully utilized and special purpose processors designed ments,” says Bill Zeitler, senior vice pres-
energy efficient.” to improve performance and reduce ident of IBM System and Technology
Specifically, Project Big Green will in- energy consumption; Group. “Bold ideas and actionable plans
volve a five-step approach to data center
energy savings: “Relief from the energy crisis can’t be achieved
• Evaluate existing facilities with en-
ergy assessment, virtual 3-D power through incremental improvements.”
management, and thermal analytics—
including identifying and resolving • Seize control with power manage- are needed to deal with this issue.”
existing/potential heat-related issues ment soft ware, such as provision- Project Big Green includes a new glob-
that could create outages; ing soft ware that can reduce 80% of al “green team” of more than 850 energy-
• Plan, build or update to an ener- power consumption on servers by efficiency architects from across IBM.
gy-efficient data center, includ- putting them on standby mode when The company also plans to launch a
ing a free online self-assessment of not needed; Web-enabled clearinghouse, the Ener-
data center energy use, the op- • Exploit liquid cooling solutions gy Efficiency Incentive Finder, which
tion of a pre-configured 500 or both inside and outside of the data will include details about incentives
1,000-square-foot data center with center, including IBM’s patented and programs that are available from
energy-efficient technology, and “stored cooling” technology designed local utility companies, governments,
a solution for improving air flow to significantly increase the efficiency and other participating agencies around
under the data center raised floor of the data center’s end-to-end cool- the world.
Short runs…
DURHAM, NH—The University of New Hampshire Interoperability RICHARDSON, TX—A Web-based printing program for producing
Lab (UNH IOL; (www.iol.unh.edu) recently conducted multi-vendor telecommunications system labels has been unveiled by
10GBase-T interoperability for Fulcrum Microsystems, Solarflare CommScope (www.commscope.com) that enables SYSTIMAX
Communications, and Teranetics. Solarflare and Teranetics BusinessPartners to create professional product labels for
demonstrated their independent 10GBase-T PHY implementation specific installations. The customized solution replaces the static
using different systems at either end of the link. Tests were repeated templates available on the company’s website, and provides
multiple times over a 55-meter, two-connector topology of Category two ways to create labels. The software supports labeling on a
6 cabling to show support for legacy installed cabling. A network number of SYSTIMAX products, including M2000/M3000 panels,
throughput and latency benchmark showed that the link sustained PATCHMAX PS panels, LE and L faceplates, and VisiPatch/
a throughout of 10-Gbits/sec. The tests used two different switch VisiPatch 360 panels.
designs from Fulcrum Microsystems (www.fulcrummicro.com).
______________
SACRAMENTO, CA—Low-power semiconductor transceiver
Mike Zeile, vice president of marketing at Fulcrum, says, “These
developer KeyEye Communications (www.keyeye.net) and copper
two switch reference designs will provide OEM customers with
transceiver manufacturer Methode Electronics (www.methode.com)
quick-to-market [Ethernet] platforms that have the assurance of
will jointly develop 10-Gigabit Ethernet copper MSA pluggable
interoperability.”
modules compatible with the short-reach, lower-power mode of
SALT LAKE CITY, UT—Silex Technologies (www.silexamerica. the IEEE 802.3an 10GBase-T standard. The companies say the
com) has unveiled Multicast Video Distribution System (MVDS), a
__ modules will help data center managers significantly reduce cost
wired/wireless video distribution system designed for the digital and power consumption resulting from a growing array of
sign industry. MVDS’ digital multicast technology and an advanced 10-Gigabit servers and switches.
compression algorithm lets it support large numbers of displays
WATERTOWN, CT—Siemon’s (www.siemon.com) EMEA (Europe,
at long distances with no image degradation. Designed for airport
Middle East and Africa) manufacturing operations and logistics
arrival/departure areas, trade shows, retail advertising, classrooms,
center’s Quality Management System in Brno, Czech Republic,
and emergency information displays, the MVDS technology can
has been certified ISO9001:2000. The Brno facility will serve as
connect using industry-standard Ethernet cabling and hardware, or
Siemon’s pan-EMEA logistics hub, housing stock and acting as the
via 802.11a wireless networking. Silex says its technology eliminates
key distribution center for the company’s markets. In addition, the
the need to use more expensive analog splitters and repeaters.
facility houses IT cabling component manufacturing operations.
52 ■ July 2007 ■ Cabling Installation & Maintenance www.cable-install.com
C Previous Page
A
Installation 7Maintenance
Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS
B F](https://image.slidesharecdn.com/cim20070701jul2007-100708124901-phpapp01/85/Cim-20070701-jul_2007-54-320.jpg)
Uploaded byCarlos Alberto Bonatto
Cim 20070701 jul_2007
The document discusses Corning UniCam Pretium fiber optic connectors that provide exceptional optical performance without epoxy or polishing due to their laser-cleaved and factory-polished fiber stub. It also discusses how the Corning cable systems focus on customer-focused innovation and how their connectors enable less than 1 dB of insertion loss. The second document discusses how the Fluke DTX Compact OTDR module can transform a cable tester into an OTDR, allowing technicians to perform fiber certification and troubleshooting. It notes how this could help businesses perform new fiber jobs and increase their revenue. The third document discusses how Optical Cable Corporation has a network of distributors across the US to provide fiber optic cables to
More Related Content
![Pos didatica aula 1 unidade i presencial[1]](https://cdn.slidesharecdn.com/ss_thumbnails/posdidaticaaula1unidadeipresencial1-100622074059-phpapp01-thumbnail.jpg?width=640&height=640&fit=bounds)
![Estresse[1]](https://cdn.slidesharecdn.com/ss_thumbnails/estresse1-100504162030-phpapp01-thumbnail.jpg?width=640&height=640&fit=bounds)
Cim 20070701 jul_2007
- 1. Contents Zoom In Zoom Out For navigation instructions please click here Search Issue Next Page ____________________ Contents Zoom In Zoom Out For navigation instructions please click here Search Issue Next Page
- 2. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F Exceptional optical performance comes naturally. Nothing is more treasured in field termination than exceptional optical performance. The secret to UniCam® Pretium™- Performance Connectors is inside – a laser-cleaved, factory-polished fiber stub that ensures outstanding connectivity in a no-epoxy/no-polish (NENP) connector. UniCam Pretium-Performance Multimode Connectors offer 0.1 dB insertion loss. And UniCam Pretium-Performance Single-Mode Connectors enable 0.2 dB insertion loss. That’s exceptional optical performance in less than a minute per fiber, from the most widely deployed NENP connector on the market. Naturally ... Customer-focused innovation is second nature at Corning. www.corning.com/cablesystems/cimls © 2007 Corning Cable Systems LLC / LS-02413 C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 3. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F Turn your cable tester into an OTDR and watch the transformation begin. See how the DTX Compact OTDR Module can turn your cable tester into an OTDR and your staff into fiber experts – to completely transform your fiber business. Imagine. A cable tester that becomes a compact, easy-to-use, full-featured OTDR. Better yet, imagine what that means for your business. A single tool to test copper and fiber. An OTDR your current technicians can easily use. Fiber jobs you couldn’t do before. Just snap the DTX Compact OTDR module onto a DTX mainframe – the industry’s benchmark for cable certification. Now you’re ready to test like a fiber expert. Perform Basic (Tier 1) and Extended (Tier 2) fiber certifica- tion. Perform powerful single-ended trouble- shooting. Deliver professional documentation. Win jobs that require OTDR testing and watch your revenue and profits increase. Look to the new DTX Compact OTDR and watch the transformation begin. Go to www.flukenetworks.com/seehow to enter to win a DTX Compact OTDR and see a live demo. N E T W O R K S U P E R V I S I O N ©2007 Fluke Corporation. All rights reserved. 02152 C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 4. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGSF Our U.S. area of expertise. No matter where you’re located, our fiber optic cable products are there. Optical Cable Corporation has built a network of reliable stocking distributors and a dedicated sales team committed to getting you the best fiber optic cables for your requirements when you need them...where you need them. For over 20 years, we have been manufacturing the broadest range of top-performing tight-buffered fiber optic cables for most applications in the government, military, and commercial markets. Your order is our top priority. Contact Optical Cable Corporation for a stocking distributor nearest you. We are where you are. 1-800-622-7711 5290 Concourse Drive • Roanoke, Virginia 24019 • Phone 540-265-0690 • www.occfiber.com C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGSF
- 5. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F COVER IMAGES SUPPLIED BY ANIXTER. JULY 2007 VOL. 15, NO. 7 ABOUT THE COVER Using vendor-neutral testing, Anixter’s features 15 Infrastructure Solutions Lab is demonstrating real- The myths and realities of world IP convergence of shielded, screened cabling security and networking Potential users must separate fact from fiction concerning noise infrastructure products so immunity, grounding, and the antenna effect. VALERIE RYBINSKI that customers can know 25 what will work best for their installation before investing. Abandoned cable removal TO LEARN MORE, SEE PAGE 49. a dogged challenge for all Unfortunately, for everyone, ignoring the issue won’t make it go away. PATRICK McLAUGHLIN 29 Twisted pair options for 10-Gigabit Ethernet Conducting appropriate tests will help ensure your medium of choice is ready for high-frequency, high-speed transmission. HUGO DRAYE 37 Products and technologies meeting myriad challenges Latest innovations aim to alleviate problems associated with cable management, power consumption, security and, oh-by-the-way, signal transmission. PATRICK McLAUGHLIN & STEVE SMITH 40 WLAN goes fat to thin and back again When the industry moved to centralized wireless solutions with switch-based controllers, many thought the war between “fat” and “thin” was over. But now it appears the battle is still on. BETSY ZIOBRON departments 6 Editorial Your network’s health is everything 49 INDUSTRY SPOTLIGHT ■ Anixter lab integrates networking, security 9 Ask Donna ‘Abandoned’ headaches ■ Big Blue digging deep for data center purge begin early ■ Cat 6A solution undergoes 10-GbE traffic test 54 New Products ■ Flexible racks meet military media center specs 56 Product Focus: ■ Wireless Gigabit Ethernet on-the-fly FIBER-OPTIC POLISHING EQUIPMENT CABLING INSTALLATION & MAINTENANCE (ISSN 1073-3108), a trademark, is published 12 times a year, monthly, by PennWell Corporation, 1421 South Sheridan Road, Tulsa, OK 74112; telephone (918) 835-3161; fax (918) 831-9497; Web address www.pennwell.com. Editorial offices: 98 Spit Brook Road, Nashua, NH 03062-5737; telephone (603) 891-0123. © 2007 CABLING INSTALLATION & MAINTENANCE. All rights reserved. Authorization to photocopy items for internal or personal use, or the internal or personal use of specific clients, is granted by CABLING INSTALLATION & MAINTENANCE (ISSN 1073-3108), provided that the appropriate fee is paid directly to Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923 USA; (978) 750-8400. Prior to photocopying items for educational classroom use, please contact Copyright Clearance Center, Inc., 222 Rosewood Drive, Danvers, MA 01923 USA; (978) 750-8400. For further information, check CCC Online at the following address: http://www.copyright.com/. All rights reserved. No material may be reprinted. Bulk reprints can be ordered from Diane Troyer, telephone (603) 891-9135. Corporate officers: Frank T. Lauinger, Chairman; Robert F. Biolchini, President and CEO. POSTMASTER: Send address changes to: CABLING INSTALLATION & MAINTENANCE, Circulation Dept., P.O. Box 3280, Northbrook, Il 60065-3280. Return undeliverable Canadian Addresses to: P.O. Box 1632, Windsor, ON N9A 7C9. Periodicals postage paid at Tulsa, OK 74101 and other additional offices. Subscriptions: In the U.S.: one year $74; Canada/Int’l surface : one year $84; International via air: one year $100. If available, back issues can be purchased for $16 in the U.S. and $21 elsewhere. We make portions of our subscriber list available to carefully screened companies that offer products and services that may be important for your work. If you do not want to receive those offers and/or information, please let us know by contacting us at List Services, CABLING INSTALLATION & MAINTENANCE, 98 Spit Brook Road, Nashua, NH 03062-5737-“Canada return address: PO Box 122, Niagara Falls, ON L2E 6S4”. www.cable-install.com Cabling Installation & Maintenance ■ July 2007 ■ 3 C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 6. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F Chief Editor / Patrick McLaughlin (603) 891-9222 • patrick@pennwell.com Executive Editor / Steve Smith (603) 891-9139 • stevesm@pennwell.com Senior Editor / Matt Vincent (603) 891-9262 • mattv@pennwell.com Circulation Manager / Michelle Blake (603) 891-9360 • michellb@pennwell.com Art Director / Kelli Mylchreest Lead Illustrator / Dan Rodd Senior Vice President/Group Publishing Director Mark Finkelstein (603) 891-9133 • mark@pennwell.com Associate Publisher/National Sales Manager Ed Murphy (603) 891-9260 • edm@pennwell.com CABLING INSTALLATION & MAINTENANCE EXECUTIVE AND EDITORIAL OFFICES PennWell ATD 98 Spit Brook Road Nashua, NH 03062-5737 Tel: (603) 891-0123, fax: (603) 891-9245 Internet: www.cable-install.com SUBSCRIPTION INQUIRIES: For subscriptions or to change your format to print or digital, please go to: www.cim-subscribe.com. Subscriptions outside the USA are available in digital format only. CORPORATE OFFICERS Chairman / Frank T. Lauinger President and Chief Executive Officer / Robert F. Biolchini Chief Financial Officer / Mark C. Wilmoth ADVANCED TECHNOLOGY DIVISION Senior Executive Assistant Carol Woodward Tel: (603) 891-9112, fax: (603) 891-9287 carolw@pennwell.com VP Audience Development / Gloria S. Adams ATD PUBLISHING SERVICES DEPARTMENTS Art Director / Meg Fuschetti Production Director / Mari Rodriguez (603) 891-9193 • marir@pennwell.com Marketing Communication Manager / Kristen Jones (603) 891-9425 • kristenj@pennwell.com Ad Traffic Manager / Jackie Linker (918) 832-9314 • jackiel@pennwell.com ________________ PRINTED IN THE USA GST NO. 126813153 Publications Mail Agreement Number 40052420 C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 7. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F Are you ready to feel the speed? Super fast testing with the WireScope Pro LAN Cabling Tester Agilent’s WireScope Pro tester sweeps a full 1GHz in a few seconds, boosting your test speed to new industry leading Cat 6A and Cat 7 autotest times of 9 seconds. It also accelerates your copper and fiber testing with dual- wavelength fiber probes, the elimination of field calibration, and a new auto-increment capability. The WireScope Pro tester is the only handheld to provide Alien Crosstalk (AXT) measurements simultaneously on multiple ‘exciter’ cables, as well as produce final results on the spot, so you can quickly handle any future AXT field testing requirements. Alternative approaches could take hours to complete and require PC post processing to see the results. With simple software upgrades and a robust hardware platform operating at 1 GHz frequency, you’ll save on the cost of test because you’ll stay state-of-the-art for many years, eliminating the need to buy new testers every year or two. u.s. 1-800-829-4444, ext. 5465 Experience the speed of the WireScope Pro tester now at canada 1-877-894-4414, ext. 5465 www.agilent.com/find/wirescope or by talking to one of our _____________________ www.agilent.com/find/wirescope _________________________ engineers by calling our 800 #s. © Agilent Technologies, Inc. 2006 C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 8. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F Your network’s health is everything R ecently, I had occasion to A doctor had ordered radiologi- department will. spend time in a special-care cal tests on a patient and required But even more striking was the unit at a hospital—not as a the results “stat.” Now, I have seen doctor’s exasperation at being put patient, but visiting for many hours enough episodes of ER (I’ll never on infinite hold twice, not by some with a loved one who was a patient in admit to watching Grey’s Anatomy) automated answering system, but the unit. Because all medical matters to know that “stat” means right away. by a real person. Then it dawned on were resolved positively and this Two hours later, the doctor could me that the doctor, along with all her member of my family came home find no results in the hospital’s data colleagues, relies first and foremost healthy, I was able to reflect on my network. So, she called the radiology on the data network for the infor- time in that hospital with some department desk, demanding to mation she needs. And there’s good practicality rather than completely know why so much time had elapsed reason for this doctor to look for in- emotionally. with no answers. The individual who formation in a database long before And one or two answered the phone in the radiology looking for it from an individual. of my observations department put the doctor on hold— We live in a fully connected world made me think and kept her there. Frustrated, the whose human element is almost about networking doctor called the desk again and always disconnected. We’ve had cell and cabling. made the same demand. Unbeliev- phones forever and through Black- But fi rst things ably, the same thing happened: on berries have been able to get our first. While a visi- hold forever. e-mail from just about anywhere. tor at the hospital, I So, the situation got escalated to the But how many phone messages go was the beneficiary top-ranking member of the radiology unreturned? How many e-mails of many comforts and accommoda- department. At that time, the doctor unanswered? The digital signals do tions, one of which was the opportu- learned the results were, in fact, avail- their jobs by getting information nity to spend time at my loved one’s able; the head of radiology read the from one point to another; it’s the bedside any time of the day or night. results to the doctor over the phone, people who have become the black As such, I witnessed more inner and the doctor went about caring for hole. I have been a frustrated mes- workings of that environment than her patient based on the information sage-sender at times. I have also been I ever imagined I would. That means she had just received. In an environ- a guilty non-returner of correspon- I saw patients in various stages ment of such immediacy, the doctor dence. So, if I’m going to point a finger of distress, and observed the quick quickly moved on to the next order anywhere, it will point to me first. (and I don’t mind saying heroic) of business. She did not have the lux- The experience made me realize actions of doctors and nurses who ury of stopping to either ponder or that many of the information sys- literally saved at least one life in complain about the communication tems you build and use today have front of my eyes. breakdown that had just taken place. become more relied-upon than So, here are these health-care pro- I eavesdropped on this event with people. Scary. But not nearly as scary viders working around the clock to interest because, after all, my loved as sitting by a loved one’s hospital maintain the health of the patients in one could have been the next one for bed for a few days. their care, or to restore their patients’ whom radiological test results were health. They don’t need, and won’t needed stat. One thing that occurred tolerate, something like a network to me was the information that was interruption getting in their way. But supposed to be in the hospital’s da- they almost did while I was watching. ta network and available to the doc- While I’m sure there’s much more to tor, was not. A network problem? PATRICK McLAUGHLIN Mc the story than I saw and heard, I’ll Could be. Cabling-related? I’ll never Chief Editor retell it from my vantage point. know, but hopefully the hospital’s IT patrick@pennwell.com 6 ■ July 2007 ■ Cabling Installation & Maintenance www.cable-install.com C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 9. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F How many tools do you use to Certify, Identify, Configure & Document your Ethernet network? (That’s too many!) Validator-NT ™ The All-in-One Network Management Tool CERTIFY individual Ethernet cable runs up to 1 Gigabit Speed per IEEE802.3 specifications. Test for TIA568 Interconnect problems. Determine fault locations, cable length and delay or noise 4" color LCD screen conditions. Produce and print cable test schedules Lithium/ion battery and cable test results. Qualify lines for VoIP usage. provides 8 continuous hours of use IDENTIFY active components of your network on Unlimited flash the other end of the cable. Identify all types of equipment card memory and port service discovery with advertised speed ratings and DHCP negotiation. Access IP addresses, ping equipment and flash hubs/switches for positive port location. CONFIGURE links between nodes at Gigabit speed. Check IP addresses on netmask, Gateway/routers and domain name servers. Confirm links between equipment for changes or upgrades. DOCUMENT the network with the included powerful Plan-Um™ software. Create layouts of offices/premises or import existing Visio/AutoCAD drawings. Show cables and equipment they connect to in physical locations. Print out layouts and corresponding Cable Test Schedules. The Network Tool section of Plan-Um™ allows you to create a complete topology layout of the network for on-site reference, showing connections, equipment and cable pathways. You can add notes to each component of the network for future add, changes, and move legacy information. Powerful Plan-Um™ Everything you need to Test, Trace software included and Tune your Ethernet Network. NT955 MSRP only $1495.00 www.test-um.com C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 10. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F ____________________________ C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 11. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F ‘Abandoned’ headaches begin early Editor’s note: This month, we bring you a slice of “Best of Ask Donna” from tion Systems, Section 820.2 defines years past. This column originally ran all the way back in February 2003, “Abandoned Coaxial Cable” as so why did we take it out of mothballs now? The first question-and-answer “Installed coaxial cable that is not ter- volley provides complementary information to another article running in minated at equipment other than a this issue (see pages 25 and 26). When reading, please note that the portions coaxial connector and not identified of the NEC discussed herein look essentially the same in the 2005 edition as for future use with a tag.” they do in the 2002 edition. Article 830 Network-Powered Then Donna finishes up with a question about the potential danger of lay- Broadband Communications Sys- ing unshielded twisted-pair cables too neatly. It struck me as an eerie fore- tems, Section 830.2 defines “Aban- shadowing of what the industry has been dealing with for the past couple doned Network-Powered Broadband years. I hope you enjoy this month’s “Best of Ask Donna” and, even more Communications importantly, find it useful.—Ed. Cable” as “Installed network-powered Q: I have a quick question. Could and Power-Limited Circuits, Sec- broadband com- I get the exact wording of what tion 725.2 defines “Abandoned Class munications cable the National Electrical Code 2002 2, Class 3, and PLTC Cable” as “in- that is not termi- states concerning abandoned stalled Class 2, Class 3, and PLTC nated at equip- cables in the plenum? cable that is not terminated at equip- ment other than a Brent Clements ment and not identified for future connector and not Rice University use with a tag.” identified for future Houston, TX Article 760 Fire Alarm Systems, use with a tag.” Section 760.2 defines “Abandoned So, what is this telling us? No- A: The question may be quick, but Fire Alarm Cable” as “Installed fire tice the common thread, “and not the answer certainly is not. Let’s alarm cable that is not terminated identified for future use with a tag.” begin with the definitions of aban- at equipment other than a connec- Any cable addressed in these specific doned cable. In NEC 2002, there tor and not identified for future use articles that is “tagged for future use” are seven definitions for abandoned with a tag.” is not abandoned cable. cable. Ironically, none are in Article Article 770 Optical Fiber Cables In some cases, having a connec- 100, the section on definitions (yet). and Raceways, Section 770.2 defines tor terminated at one end (audio dis- Article 640 Audio Signal Pro- “Abandoned Optical Fiber Cable” as tribution cable; Class 2, Class 3, and cessing, Amplification, and Repro- “Installed optical fiber cable that is PLTC Cable) or both ends (commu- duction Equipment, Section 640.2 not terminated at equipment other nications cable) of the cable means defines “Abandoned Audio Distri- than a connector and not identified that it is not abandoned cable. bution Cable” as “installed audio for future use with a tag.” While in other cases, having the distribution cable that is not termi- Article 800 Communications Cir- cable connected to equipment that nated at equipment and not identi- cuits, Section 800.2 defines “Aban- is not a connector (fire alarm ca- fied for future use with a tag.” doned Communications Cable” as ble; optical fiber cable; coaxial ca- Article 725 Class 1, Class 2, and “Installed communications cable that ble; network-powered broadband Class 3 Remote-Control, Signaling, is not terminated at both ends at a communications cable) means that connector or other equipment and it is not an abandoned cable. In NEC DONNA BALLAST is BICSI’s standards s standards not identified for future use with speak, a “connector” is “equipment,” representative, and a BICSI registered and a BICSI registered communications distribution designer (RCDD). distribution designer a tag.” and that is why the “equipment other (RCDD). Send your question tovia e-mail: Send your questions to Donna Donna at: Article 820 Community Anten- than a connector” verbiage is used. dballast@swbell.net na Television and Radio Distribu- Most Sections [640.3(A); ➤ www.cable-install.com Cabling Installation & Maintenance ■ July 2007 ■ 9 C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 12. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F 725.3(B); 760.3(A); 770.3(A); 800.52(B); You asked specifically about ple- Q: I was reviewing the discussion on the 820.3; 830(A)] only address the “acces- num spaces, but the same text applies BICSI Public Forum about laying cables sible portion” of an abandoned cable to plenum, riser, and hollow spaces in parallel to each other in a fi xed physical as “not be permitted to remain.” Arti- the building. If it is “abandoned” and relationship. I noticed that one comment cle 100 defines “Accessible (as applied to “accessible,” take it out. said that the European norm addresses wiring methods)” as “Capable of being Seven definitions for almost the same it to some degree. Do you know if any removed or exposed without damag- term is a lot, even for the NFPA. So, for of the U.S. standards have intentions to ing the building structure or finish or NEC 2005 the International Brother- address it? I have a client in New Jersey, not permanently closed in by the struc- hood of Electrical Workers Codes and with a large data center, that is asking ture or fi nish of the building.” … So, Standards Committee is proposing to me for input. At present they are laying this is not a surgical removal in a fin- delete the current seven to add a new large bundles of cables into cable trays ished space. But if the entire area of the definition to Article 100, which would and they want the cables combed as they building is undergoing demolition for read: “Abandoned Cable. Installed are installed. I told them I would check remodeling, then all of the cable should cable that is not terminated at both and let them know. be accessible and removed. ends at equipment and not identified for Bobby Ashton, Jr., And then there is Article 645—the future use with a tag.” But so far the RCDD/LAN Specialist one that did not bother to uniquely other “stakeholders,” who carefully South Windsor, CT define “abandoned cable,” which is crafted the various definitions in their only concerned with abandoned cable respective Articles, are not supportive A: Intentions, yes. At the TIA TR-42.1 that is not contained in metal raceway. of this “one-size-fits-all” approach. February 2002 meeting, a presentation So, metal raceways full of dead cable It is going to be an interesting couple (TR 42.1-2002-013) was made, which ref- under raised floors in data centers are of years. erenced a list of contributions, previously not a concern? submitted to either the TR-42.7 Tele- PANDUIT introduces the affordable and powerful COUGAR ™ LS9 Hand-Held Thermal Transfer Printer ■ Economical identification system provides premium quality solutions at the lowest installed cost ■ Prints a wide variety of continuous tapes for marking of cables, patch panels, faceplates and other network applications ■ Legends can be easily aligned with ports on patch panels and faceplates, eliminating the need for manual spacing and guesswork ■ Cut-to-length functionality eliminates label waste and label trimming labor ■ Partial cut feature available to provide tear-apart strips of labels ■ P1 ™ Label Cassette contains integrated memory device for automatic formatting, recall of last legend used, and number of labels remaining in the cassette ■ Fast-loading label cassette includes both label material and ribbon to make changing labels easy PANDUIT offers a broad range of economical identification products that aid in TIA/EIA-606-A compliance including labels, labeling software, and printers. Visit us at www.panduit.com/p922 Contact Customer Service by email: cs@panduit.com or by phone: 800-777-3300 and reference ad # p922 Cable Network Partial Cut Strip P1 ™ Label Cassette Marking Components of Labels C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 13. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F communications Copper Cabling Sub- and the pathway is not overfilled, then have seen use seven cables—six disturb- committee or the Cable Working Group, “alien crosstalk” should be one less net- ers and one victim cable. That would dating from 1997 through 2002. Each of work anomaly you have to address. mean seven sets of field test instruments these contributions had addressed some And what about testing? While your in use at the same time to test one cable negative effect on the transmission per- network can certainly suffer from the link. And there are currently no pass/fail formance of category UTP cabling effects, measuring alien crosstalk is not limits proposed or set. caused by bundling or other similar something you want to attempt in the My advice: loosen up and avoid the cabling installation practices. field. Most measurement models that I problem. TR-42.1-2002-013 suggested that, based on these contributions, a Study Group be formed to develop informa- tion on the expected variance in trans- mission performance of cables that are installed in close proximity. TR-42.1-2002-013 further proposed that once the work was completed and validated, it would be drafted as a matrix, and published as an informative Annex to TIA/EIA-568B.1. The matrix would include alien NEXT and FEXT for Cat- egory 5e and Category 6 cables that are tie-wrapped at specified intervals, cables installed in a tray with 50% fi ll, cables installed in a conduit with 40% fill, and cables suspended on J-hooks. Meanwhile, we will have to contin- ue to scare our clients suffering from “overneatness tendencies” using threats of the dreaded “alien crosstalk.” You are welcome to use the following. It has worked for me in the past. Cabling systems and network hard- ware are designed to handle predict- What’s at the core of your fiber? able noise, like NEXT and FEXT, which comes from within the same cable. This is why when you remove the sheath from a twisted-pair cable, each of the pairs is twisted at a different rate. But when UTP cables of the same con- struction are neatly dressed and packed, Chances are you don’t know. Some fiber manufacturers you are inviting trouble. You are creating don’t specify bandwidth in the critical center region of a quasi field-manufactured hybrid cable, the fiber. But when you select OFS’ LaserWave® OM3 because the twists are the same in each of fiber, you get outstanding performance right down to the neighboring cables. This creates un- the core. LaserWave fiber delivers DMD specified in the predictable noise between neighboring 0 – 5 micron range and up to twice the bandwidth for lasers that launch power in the fiber’s center. Enjoy fast, cables; the noise is called alien crosstalk. reliable transmission and easier connectivity. To learn more, And the neater the cables are laid, and the ask your cabler about OFS or visit ofsoptics.com/fiber. closer you pack them together, the more likely you are to experience the problem. If the UTP cables are randomly laid www.cable-install.com Cabling Installation & Maintenance ■ July 2007 ■ 11 C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 14. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F ALL HAIL THE NEW KING OF CARGO. INTRODUCING THE ALL-NEW 2007 DODGE SPRINTER > Dodge Sprinter is the most versatile commercial van on the market* > Combine the 3500 Extended Cargo Van with a 170-inch wheelbase and the available Mega Roof and you get best-in-class* cargo capacity of 600 cu ft, up to 89% more than GM competitors and up to 118% more than Ford > Towing up to 5,000 lb† > Combine 3500’s 144-inch wheelbase with High Roof for best-in-class* payload of up to 5,570 lb, up to 32% more than Ford and up to 34% more than GM’s 3500 cargo vans. For more info, visit dodge.com/sprinter, or call 800-4ADODGE. *Based on Automotive News classification. †When properly equipped. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 15. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F Chrysler Financial is a business unit of DaimlerChrysler Financial Services. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 16. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F Mohawk’s pre-terminated fiber optic Plug’n Play solutions combine ease of installation with the flexibility to work with any corresponding fiber cassette. Whether long runs or short runs, Mohawk’s Plug’n Play fiber solutions complement data center performance with its compact cable size and maximum flexibility. Features and Benefits: • Pre-terminated cables for premium performance. • Small diameter and bend radius for installation in high density environments. • The MPO terminations allow the cables to plug into any corresponding fiber cassette. • Compliant to TIA-568-C.3. MOHAWK For more information or a copy of our Application Note visit www.mohawk-cable or call 800-422-9961. Cabling Excellence for Open Architecture C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 17. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F www.cable-install.com design The myths and realities of shielded, screened cabling A global standard since the 1980s, screened and shielded twisted-pair cop- per cabling varieties are still a mainstay Potential users must separate fact from fiction concerning noise immunity, grounding, and the antenna effect. in some markets. While many other mar- kets have migrated largely to unshielded twisted-pair not yet be realized by early-generation twisted-pair design (UTP) cables, the recent ratification of the 10GBase- and manufacturing capability. It is not surprising that this T standard for 10-Gbit/sec Ethernet over copper has robust cabling type still supports some buildings today. re-established the commercial viability of screened and By 1990, however, LAN industry experts began to recog- shielded systems, and has fueled greater adoption of nize Ethernet’s performance and reliability advantages over these systems in markets that previously were UTP-centric. LAN noise sources In this competitive landscape, H many confusing and often con- Ve E tradictory messages are finding l their way to the marketplace. This article addresses common questions, issues, and miscon- ceptions regarding screened and h Vd shielded cabling. From Token Ring to Ethernet Vg When LAN cabling emerged in Equipment Interconnect Work area outlet End-user device the 1980s to support the first Source: Siemon computer networks in commer- cial building space, the networks typically deployed IBM This setup shows the three sources of noise for LAN cabling sys- Token Ring transmission, which was standardized as tems. Differential noise (Vd) is induced from an adjacent twisted- IEEE 802.5 in 1985. Cabling for Token Ring networks pair or balanced cable; environmental noise (Ve) is induced by was IBM Type 1 cable—consisting of two loosely twist- an external electromagnetic field; and ground loop noise (Vg) is ed, foil-shielded, 150-Ω pairs surrounded by an overall induced by a difference in potential between conductor ends. braid—mated to unique hermaphroditic connectors. This cabling was an optimum choice for support of first- Token Ring. Concurrently, twisted-pair design and man- generation LAN topologies. Its design took advantage of ufacturing capabilities had progressed to the point where the twisted-pair transmission protocol’s ability to individual foils were no longer required to provide inter- maximize distance (Token Ring served distances up to nal crosstalk isolation, and overall shields were not neces- 100 meters) and data rates using cost-effective transceivers. sary to provide immunity against outside noise sources in The foils and braid improved crosstalk and electromagnet- the 10Base-T and 100Base-T bands of operation. ic compatibility (EMC) performance to levels that could Publication of the 10Base-T application in 1990, and the first edition TIA/EIA-568 cabling standard the fol- VALERIE RYBINSKI is global sales engineer with Siemon (www.siemon.com). lowing year, in conjunction with the lower cost as- ➤ www.cable-install.com Cabling Installation & Maintenance ■ July 2007 ■ 15 C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 18. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F sociated with UTP cabling, firmly established UTP as the While this bandwidth provides more than sufficient noise medium of choice for new LAN networks. immunity for such applications as 100Base-T and 1000Base-T, Shannon Capacity modeling demonstrates that this level pro- Balancing act vides no headroom to the minimum 10GBase-T noise immu- The benefit of specifying balanced twisted-pair cabling for nity requirements. The use of shielding, however, data transmission is clearly demonstrated by examining the significantly improves noise immunity, doubles the available types of signals present in building environments. Electrical Shannon Capacity, and substantially increases practical oper- signals can propagate in either common mode or differential ating bandwidths for future applications. (i.e., “balanced”) mode. Common mode describes a signal scheme between two con- Noise and immunity ductors in which the voltage propagates in phase and is ref- Modal conversion is an effect of degraded twisted-pair signal bal- erenced to ground. Examples of common mode transmission ance above 30 MHz, which occurs when differential mode signals include DC circuits, building power, cable TV, heating/venti- convert to common mode signals, and vice versa. The conversion lation/air-conditioning (HVAC) circuits, and security devices. can adversely impact noise immunity from the environment Electromagnetic noise induced from disturbers, such as as well as contribute to crosstalk between pairs and balanced motors, transformers, fluorescent lights, and radio-frequency cables, and must be minimized whenever possible. Shielding (RF) sources, also propagates in common mode. Virtually can decrease the potential for modal conversion by limiting every signal and disturber type in the building environment noise coupled onto the twisted-pair from the environment. propagates in common mode, with one notable exception— All applications require positive signal-to-noise ratio (SNR) twisted-pair cabling, which is optimized for balanced, or dif- margins to transmit within allocated bit error rate (BER) ferential mode, transmission. levels. This means that the data signal being transmitted must Differential mode transmission refers to two signals that have be of greater magnitude than all of the combined noise dis- equal magnitudes, but are 180° out of phase, and that propa- turbers coupled onto the transmission line—i.e., the struc- gate over two conductors of a twisted pair. In a balanced cir- tured cabling. cuit, two signals are referenced to each other rather than one Noise can be coupled onto twisted-pair cabling in any or signal being referenced to ground. There is no ground con- all of three ways. nection in a balanced circuit and, as a result, these types of • Differential noise: Noise induced from an adjacent twist- circuits are inherently immune to interference from most com- ed-pair or balanced cable; mon mode noise disturbers. • Environmental noise: Noise induced by an external elec- In theory, common mode noise couples equally onto each tromagnetic field; conductor of a perfectly balanced twisted-pair. Differen- • Ground loop noise: Noise induced by a difference in poten- tial mode transceivers detect the difference in peak-to-peak tial between conductor ends. magnitude between the two signals on a twisted pair by per- Different applications have varying sensitivity to interfer- forming a subtraction operation. In a perfectly balanced ence from these three noise sources, depending upon their cabling system, the induced common mode signal would capabilities. For example, the 10GBase-T application is com- appear as two equal voltages that are simply subtracted out by monly recognized to be extremely sensitive to alien crosstalk the transceiver, thereby resulting in perfect noise immunity. (differential mode cable-to-cable coupling) because its digi- In the real world, however, twisted-pair cables are not per- tal signal processing (DSP) capability electronically cancels fectly balanced, and their limitations must be understood by internal pair-to-pair crosstalk within each channel. Unlike application developers and system specifiers. pair-to-pair crosstalk, alien crosstalk cannot be cancelled by TIA and ISO/IEC committees take extreme care in speci- DSP. Conversely, because the magnitude of alien crosstalk is fying balance parameters, such as transverse conversion loss very small compared to pair-to-pair crosstalk, the presence of (TCL), transverse converse transfer loss (TCTL), and equal- alien crosstalk minimally impacts the performance of other level transverse converse transfer loss (ELTCTL) in their applications, such as 100Base-T and 1000Base-T, that employ standards for higher-grade (Category 6 and above) struc- partial or no crosstalk-cancelling algorithms. tured cabling. By examining the performance limits for these EMC describes both a system’s susceptibility to interfer- parameters and noting when they start to approach the noise ence from, and potential to disturb, outside sources. It is an isolation tolerance required by various Ethernet applica- important indicator of a system’s ability to co-exist with other tions, it becomes clear that the practical operating bandwidth electronic/electrical devices. Noise immunity and emissions per- (defined by acceptable levels of common mode noise immu- formance is reciprocal, meaning that the cabling system’s abil- nity due to balance) is approximately 30 MHz. ity to maintain immunity to interference is proportional ➤ 16 ■ July 2007 ■ Cabling Installation & Maintenance www.cable-install.com C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 19. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F copper-to-fiber media converters that extend your network exactly where and when you need it. Transition Networks sharpens your ability to do smart business with modular conversion solutions that give you the control to expand your network by user, distance, or protocol. Put us between your copper and fiber for a secure and smooth response to your networking issues. Our media converters economically accommodate multiple protocols, platforms and interfaces. Contact Transition Networks and take dead aim at doing business even better. Transition Networks take performance above and beyond expectations with every product we make.We are the simple, seamless and practical solution to copper-fibre conversion; accommodating multiple protocols, platforms and interfaces. Expand, extend and expect far more from Transition Networks. Contact us today and plan to go farther. www.transition.com 800-526-9267 transition networks for me. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 20. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F to the system’s potential to radiate. Interestingly, while the outermost conductive element of the cabling—the conduc- unnecessary emphasis is placed on immunity considerations, tors themselves in a UTP environment, and the overall screen/ it is understood that structured cabling systems do not radi- shield in a screened/fully shielded environment. ate or interfere with other equipment or systems in the tele- Again, through the means of calculations, what becomes communications environment. readily apparent is that the common mode impedance is not Here’s a more detailed look at the various noise disturbers: very well controlled in UTP environments. This impedance Differential noise disturbers. Alien crosstalk and internal depends on factors such as distance from metallic raceways, pair-to-pair crosstalk are examples, and must be minimized metallic structures surrounding the pairs, use of non-metallic through proper cabling-system design. Susceptibility to inter- raceways, and termination location. Conversely, this common ference from differential mode sources is dependent upon sys- mode impedance is well defined and controlled in screened/ tem balance and can be improved by isolating or separating shielded cabling environments. conductors that are interfering with each other. Cabling with Importantly, the overall susceptibility of twisted-pair improved balance—Category 6 and above—exhibits better cables to electric field disturbance depends on both the bal- internal crosstalk and alien crosstalk performance. Because no ance performance of the cabling and the presence of a screen cable is perfectly balanced, strategies such as using dielectric or shield. Well-balanced cables (Category 6 and above) should material to separate conductors or using metal foil to isolate be immune to electromagnetic interference up to 30 MHz. The conductors are employed to further improve crosstalk perfor- presence of a shield or screen is necessary to avoid electromag- mance. For example, Category 6A F/UTP cabling is proven to netic interference at higher frequencies, which is an especially have substantially superior alien crosstalk performance than critical consideration for next-generation applications. Category 6A UTP cabling because its overall foil construction For example, it is reasonable to model that an emerging reduces alien crosstalk to virtually zero. Category 7 S/FTP is application using DSP techniques will require a minimum proven to have substantially superior pair-to-pair and alien SNR of 20 dB at 100 MHz. Because the minimum isolation crosstalk performance than any Category 6A cabling design yielded by balance alone is also 20 dB at 100 MHz, the addition because its individual foiled twisted-pair construction reduc- of a screen or shield is necessary to ensure this application has es pair-to-pair and alien crosstalk coupling to virtually zero. sufficient noise immunity headroom for operation. These superior crosstalk levels could not be achieved solely Ground loops. These develop when there is more than one through compliant balance performance. ground connection, and the difference in common mode volt- Environmental noise disturbers. Environmental noise age potential at these ground connections induces noise on the is electromagnetic noise made up of magnetic fields gener- cabling. It is a misconception that common mode noise from ated by inductive coupling, and electric fields generated by ground loops can only appear on screens and shields; this noise capacitive coupling. Magnetic field coupling occurs at low regularly appears on the twisted pairs as well. A key point about frequencies, such as 50 or 60 Hz, where the balance of the the voltage generated by ground loops is that its waveform is cabling system is more than sufficient to ensure immunity. Its directly related to the profi le of the building’s alternating impact can be ignored for all types of balanced cabling. Elec- current (AC) power. In the United States, the primary noise tric fields, however, can produce common mode voltages on frequency is 60 Hz and its related harmonic, which is often balanced cables depending on their frequency. The magni- referred to as AC “hum.” In other regions of the world, the pri- tude of the voltage induced can be modeled, assuming that the mary noise frequency is 50 Hz and its related harmonic. cabling system is susceptible to interference in the same Because each twisted pair is connected to a balun transformer manner as a loop antenna. and common mode noise rejection circuitry at both ends of Mathematical formulas demonstrate that a 60-Hz signal the circuit—the network interface card (NIC) and the network results in an electric field disturbance that can only be mea- equipment—differences in the turn ratios and common mode sured in the thousands-of-mV (millivolt) range, while sources ground impedances can result in common mode noise. The operating in the MHz range can generate a fairly large electric magnitude of the induced noise on the twisted pairs can be field disturbance. For reference, 3 Volts/meter (V/m) is consid- reduced, but not eliminated, through the use of common mode ered to be a reasonable approximation of the average electric terminations, chokes, and filters within the equipment. field present in a light industrial/commercial environment, and Ground loops induced on the screen/shield typically 10 V/m is considered to be a reasonable approximation of the occur because of a difference in potential between the ground average electric field present in an industrial environment. connection at the telecommunications grounding busbar The loop area is the one variable that impacts the magnitude (TGB) and the building ground connection provided through of the voltage coupled by the electric field. Common mode cur- the network equipment chassis at the work-area end of the rents generated by an electric field induce unwanted signals on cabling. Note that it is not mandatory for equipment ➤ 18 ■ July 2007 ■ Cabling Installation & Maintenance www.cable-install.com C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 21. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F 1990s 1970s Shielded “Vampire” Modular Tap Jack 1980s 4 Position Data Connector Follow The Leader In Shielded Technology The new AMP-TWIST Jack is our latest shielded product evolution. It can be terminated in about 90 seconds, quicker and more reliably than any similar product on the market. Tyco Electronics has always been forward, have been the leading Proceed With Confidence on the cutting edge of shielded advocate for shielded technology If you are considering upgrading to technology. We have been designing across the globe. a 10 G solution, then come to the and manufacturing quality shielded brand that knows shielded best! Visit communications products for more Tyco Electronics has always believed www.ampnetconnect.com to see why than three decades. In fact, we what the industry is just now a high performance 10 G Shielded introduced our first fully shielded realizing, that a Shielded System is Cabling System from Tyco Electronics twisted pair cabling products in the by far the best choice for today’s is the best choice for your structured early ‘80s – and from that point 10 G performance requirements. cabling needs. Tyco Electronics, TE Logo, AMP AMP NETCONNECT, NETCONNECT, and AMP-TWIST are trademarks. , Other products, logos, and company names mentioned herein may be trademarks of their respective owners. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 22. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F manufacturers to provide a low-impedance build- ing ground path from the shielded 8-pin modu- Ground loops Chassis/Cabinet/Rack Work area equipment lar (RJ-45) jack through the equipment chassis. Shielding Sometimes, the chassis is isolated from the build- Signal ing ground with a protective RC circuit and, in source Vs other cases, the shielded RJ-45 jack is completely isolated from the chassis ground. Group loop current Telcom Work area Excessive ground loop thresholds room Vg TIA and ISO standards identify the threshold when Ground potential difference -ground loop source an excessive ground loop develops as when the dif- Source: Siemon ference in potential between the voltage measured at the shield at the work-area end of the cabling, and A difference in ground potential between the work area and the telecommunications the voltage measured at the ground wire of the elec- room is the source of a ground loop. Typically, the difference in potential is between trical outlet used to supply power to the workstation, the ground connection at the telecommunications grounding busbar and the building exceeds 1.0 Vrms (Volts, root mean square). This dif- ground connection provided through the network equipment chassis at the work area. ference in potential should be measured and correct- ed in the field to ensure proper network equipment operation, the cabling plant itself is sufficient to ensure immunity regard- but values in excess of 1.0 Vrms are very rarely found in coun- less of the actual voltage magnitude. tries that have carefully designed and specified building and It is commonly believed that ground loops only appear on grounding systems. Furthermore, because the common mode screened and shielded cabling systems, but that’s a myth. The voltage induced by ground loops is low frequency (50 or 60 Hz fear is that ground loops resulting from a difference in voltage and their respective harmonics), the balance performance of potential between a screened/shielded cabling system’s ground connections cause excessive common mode currents that can adversely affect data transmission. In fact, screens and shields, and the balanced twisted pairs in a UTP cable, are affected by differences in voltage potential at the end of the channel. The difference in the transformer common mode termina- tion impedance at the NIC and the network equipment natu- rally results in common mode noise current being induced on each twisted pair. Grounding of the screened/shielded system in multiple locations can result in common mode noise current be- ing induced on the screen/shield; however, these common mode noise currents do not affect data transmission because, regardless of their voltage magnitude, their waveform is always associated with the 50- or 60-Hz profile of the building AC power. Thanks to the balance of the cabling at low frequencies, common mode currents induced onto the twisted pair, either directly from equipment-impedance differentials or coupled from a screen/shield, are simply subtracted out by the trans- ceiver as part of the differential transmission algorithm. Grounding and cabling systems The ANSI-J-STD-607-A-2002 standard defines the building telecommunications grounding and bonding infrastructure that originates at the service equipment (power) ground and extends throughout the building. It is important to recognize that the infrastructure applies to both UTP and screened/ shielded cabling systems. _____________________________________ The standard includes many mandates, including: 1. The telecommunications main grounding busbar (TMGB) is 20 ■ July 2007 ■ Cabling Installation & Maintenance www.cable-install.com C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 23. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F _________________ bonded to the main building service ground. Actual meth- ods, materials, and appropriate specifications for each of the components in the telecommunications grounding and bonding system vary according to system and network size, capacity, and local codes. 2. If used, TGBs are bonded to the TMGB via the telecommu- nications bonding backbone. 3. All racks and metallic pathways are connected to the TMGB or TGB. 4. The cabling plant and telecommunications equipment are grounded to equipment racks or adjacent metallic pathways. TIA and ISO standards provide one additional step for the grounding of screened and shielded cabling systems. Specifi- cally, clause 4.6 of ANSI/TIA-568-B.1 and clause 11.3 of ISO/ IEC 11801:2002 state that the cable shield shall be bonded to the TGB in the telecommunications room, and that ground- ing at the work area may be accomplished through the equip- ment power connection. This procedure is intended to support the optimum configu- ration of one ground connection to minimize the appearance of ground loops, but recognizes that multiple ground connec- tions may be present along the cabling. When the grounding and bonding recommendations spec- ified in ANSI-J-STD-607-A-2002 were developed, consid- eration was given to the possibility that grounding at the work area through the equipment cord may occur; therefore, there is no need to specifically avoid grounding the screened/ shielded system at the user’s PC or device. The difference be- tween a ground connection and a screen/shield connection is notable and important. A ground connection bonds the screened/shielded cabling system to the TGB or TMGB, while a screen/shield connection maintains electrical continuation of the cable screen/shield through the screened/shielded telecom- munications connectors along the full length of cabling. Part of the function of the screen or shield is to provide a low- impedance ground path for noise currents that are induced on the shielded material. Compliance to the TIA and ISO spec- ifications for the parameters of cable and connection hard- ware transfer impedance and coupling attenuation ensures the maintenance of a low-impedance path through all screened/ shielded connection points in the cabling system. For optimum alien crosstalk and noise immunity perfor- mance, shield continuity should be maintained throughout the end-to-end cabling system. UTP patch cords in screened/ shielded cabling systems should be avoided. Building end users should perform a validation to ensure that screened and shielded cabling systems are prop- erly grounded to the TGB or TMGB. Here’s a recommended inspection plan: • Visually inspect to verify that all equipment racks/cab- ➤ www.cable-install.com C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 24. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F inets/metallic pathways are bonded to the TGB or TGMB Typical foil thicknesses are 1.5 mils (0.038 mm) to 2.0 mils using a 6-AWG conductor. (0.051 mm) to match the maximum penetration depth of a • Visually inspect to verify that all screened/shielded patch 30-MHz signal. This design approach ensures that higher fre- panels are bonded to the TGB or TMGB using a 6-AWG quency signals will not interfere with the twisted pairs as a conductor. result of their good balance performance. Braids and drain • Perform a DC resistance test to ensure that each panel and wires add strength to cable assemblies and further decrease rack/cabinet grounding connection exhibits a DC resistance measurement of <1 Ω between the bonding point of the Antenna susceptibility: panel/rack and the TGB or TMGB. (Note: Some local/ UTP vs. grounded F/UTP regional standards specify a maximum DC resistance of 0 <5 Ω at this location). -20 • Document the visual inspection, DC test results, and all -40 other applicable copper/fiber test results. TIA and ISO standards identify the threshold when an -60 40 db gain excessive ground loop develops as when the difference in -80 potential between the voltage measured at the shield at the -100 work-area end of the cabling, and the voltage measured at the ground wire of the electrical outlet used to supply power to the -120 1 10 100 workstation, exceeds 1.0 Vrms. While this difference in poten- Frequency (MHz) tial should be measured and corrected in the field to ensure * Data provided courtesy of NEXANS/Berk-Tek proper network equipment operation, values in excess of This data, provided by Nexans/Berk-Tek (www.berktek.com), shows the __________ 1.0 Vrms are very rarely found in countries that have care- difference in coupling between two UTP cables (black) is at least 40 fully designed and specified building and grounding systems. dB worse than the interaction between two properly grounded F/UTP Furthermore, because the common mode voltage induced by cables (blue). ground loops is low frequency, the balance performance of the cabling plant is sufficient to ensure immunity regardless of the end-to-end electrical resistance of the shield when the the actual voltage magnitude. cabling system is properly connected to ground. A common myth says that screens and shields can behave Shield design and the antenna myth as antennas because they are long lengths of metal. The fear is Shielding offers the benefits of significantly improved pair- that screens can “attract” signals that are in the environment, to-pair crosstalk performance, alien crosstalk performance, or radiate signals that appear on the twisted pairs. Th e fact is and noise immunity that cannot be matched by any other that both screens and shields, and the copper balanced twisted cabling design strategy. Category 6A and lower-rated F/UTP pairs in a UTP cable, will behave as an antenna to some cables are constructed with an overall foil surrounding the four degree. The difference is the noise that couples onto the screen twisted pairs. Category 7 and higher-rated S/FTP cables are con- or shield is actually 100 to 1,000 times smaller in magnitude structed with an overall braid surrounding four individually foil- than the noise that is coupled onto an unshielded twisted pair shielded pairs. Optional drain wires are sometimes provided. in the same environment. This difference is due to the internal Shielding materials are selected for their ability to maxi- pairs’ well-defined and controlled common mode impedance mize immunity to electric field disturbance, capability to to the ground plane that is provided by the screen/shield. reflect the incoming wave, absorption properties, and ability Here is an analysis of the two types of signal disturbers that to provide a low-impedance signal path. As a rule, more con- can affect the noise immunity performance of balanced twist- ductive shielding materials yield greater amounts of incom- ed-pair cabling: ing signal reflection. At frequencies below 30 MHz, noise currents from the envi- Solid aluminum foil is the preferred shielding media for tele- ronment can penetrate the screen/shield and affect the twisted communications cabling because it provides 100% coverage pairs; however, the magnitude of these signals is substantially against high frequency (greater than 100 MHz) leakage, as smaller (and mostly attenuated due to the absorption loss of well as low electrical resistance when properly connected to the aluminum foil), meaning that unshielded twisted pairs in ground. The thickness of the foil shield is influenced by the the same environment are actually subjected to a much higher skin effect of the interfering noise currents. Skin effect is the electric field strength. The good news is that the balance per- phenomenon in which the noise current’s depth of penetra- formance of the cable itself is sufficient up to 30 MHz to en- tion decreases as frequency increases. sure minimum susceptibility to disturbance from these noise 22 ■ July 2007 ■ Cabling Installation & Maintenance www.cable-install.com C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 25. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F sources, regardless of the presence of an overall screen/shield. Antenna susceptibility: At frequencies above 30 MHz, noise currents from the envi- UTP vs. ungrounded F/UTP ronment cannot penetrate the screen/shield due to skin effects, 0 and the internal twisted pairs are fully immune to interfer- -20 ence. Unfortunately, balance performance is no longer suffi- cient to ensure adequate noise immunity for UTP cabling at -40 20 db gain these higher frequencies. This can have an adverse impact on -60 the cabling system’s ability to maintain the SNR levels required -80 by applications employing DSP technology. The potential for a cable to behave as an antenna can be -100 experimentally verified by arranging two balanced cables in -120 series, injecting a signal into one cable to emulate a trans- 1 10 100 Frequency (MHz) mit antenna across a swept frequency range, and measuring * Data provided courtesy of NEXANS/Berk-Tek the interference on an adjacent cable to emulate a receiving antenna. As a rule of thumb, the higher the frequency of the Even when two F/UTP systems are left ungrounded, they still provide noise source, the greater the potential for interference. The cou- a minimum of 20 dB better performance (blue) than two UTP cables pling between two UTP cables is a minimum of 40 dB worse (black). [Data provided by Nexans/Berk-Tek.] than the interaction between two properly grounded F/UTP cables. It should be noted that 40 dB of margin corresponds to and especially above 30 MHz when cable balance starts to 100 times less voltage coupling, thus confirming the modeled significantly degrade; predictions. The UTP cable radiates and receives—behaves like • Significantly increased Shannon Capacity for future an antenna—substantially more than the F/UTP cable. applications. A second antenna myth is that common mode signals appearing on a screen or shield can only be dissipated through Fusion of the best a low-impedance ground path. The fear is that an unground- Achievable SNR margin is dependent upon the combined prop- ed screen will radiate signals that are “bouncing back and forth” erties of cabling balance and the common mode and differential and “building up” over the screen/shield. In fact, left unground- mode noise immunity provided by screens and shields. Applica- ed, a screen/shield will substantially attenuate higher-frequen- tions rely on positive SNR margin to ensure proper signal trans- cy signals because of the low-pass fi lter formed by its resistance, mission and minimum BER. With the emergence of 10GBase-T, distributed shunt capacitance, and series inductance. it has become clear that the noise isolation provided by good The effects of leaving both ends of a foil twisted-pair balance alone is just barely sufficient to support transmission cable ungrounded can also be verified by using the above- objectives. Furthermore, the alien crosstalk and noise immunity mentioned experimental method. The coupling between two benefits provided by F/UTP and S/FTP cabling designs UTP cables is still a minimum of 20 dB worse than the interac- have been demonstrated to offer almost double the Shannon tion between two ungrounded F/UTP cables. (Note that 20 dB Capacity, a performance advantage that has caught the atten- of margin corresponds to 10 times less voltage coupling.) Even tion of application developers and system specifiers alike. under worst-case, ungrounded conditions, the UTP cable It is often said that the telecommunications industry has behaves more like an antenna than the F/UTP cable. come full circle in the specification of its preferred media type. Modeled and experimental results clearly dispel these an- In actuality, today’s screened and fully shielded cabling sys- tenna myth. Screens and shields offer substantially improved tems represent a fusion of best features of the last two gener- noise immunity compared to unshielded constructions above ations of LAN cabling: excellent balance to protect against 30 MHz, even when improperly grounded. low-frequency interference, and shielding to protect against The performance benefits of using screened and fully high-frequency interference. shielded systems include: • Reduced pair-to-pair crosstalk in fully shielded designs; (Editor’s note: This article is derived from Valerie Rybinski’s • Reduced alien crosstalk in screened and fully shielded white paper, “Screened and Shielded Cabling: Noise Immuni- designs; ty, Grounding, and the Antenna Myth.” The paper contains in- • Screened Category 6A cable diameters that are smaller formation used in this article, as well as a full explanation of than many 6A UTP cables, allowing greater pathway fi ll/ the simplified loop antenna model, a complete bibliography of utilization; Rybinski’s sources, and a glossary of terms and acronyms. The • Substantially improved noise immunity at all frequencies, white paper is available at www.siemon.com.) www.cable-install.com Cabling Installation & Maintenance ■ July 2007 ■ 23 C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 26. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F Small Space. Big Results. The Mighty Mo® Telecom Enclosure Connect the backbone cable, switches, and up to 48 ports of high performance connectivity. Increase performance, add flexibility, and free up space in your Telecom Room – all at a lower cost. Call us at 888-879-0724, or visit www.ortronics.com today to learn how the Mighty Mo telecom enclosure will change the way you bring high performance to the desktop. Endless Possibilities. E X P E R T I S E . T E C H N O L O G Y. S O L U T I O N S . C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 27. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F www.cable-install.com installation Abandoned cable removal a dogged challenge for all F or just about a half- decade, the National Electri- cal Code has included lan- Unfortunately, for everyone involved, ignoring the issue won’t make it go away. guage requiring the removal of cable from building pathways when that cable is nization has adopted a position on the existence, and not in current use or tagged for future use. The NEC removal, of abandoned cable. defines this type of cable as “abandoned,” and man- To quote BOMA’s position paper directly, “Building dates its removal, though not its method of removal. owners, managers, tenants, and service providers need Over the past five years, this and other cabling-trade to work cooperatively to ensure that all parties under- publications have chronicled the development and modi- fication of abandoned-cable removal requirements. More recently, trade publications focused on the profession of real-estate management have turned their attention to the topic as well, and with good reason. The glut of aban- doned cables inside commercial office buildings today exists, at least in part, because of the transient nature of occupancy in such buildings. Traditionally, when a tenant moves out of a building, it would leave the cabling in place—sometimes, several generations of it (e.g., Category 3, 5, 5e for some long-term tenants). And most often, a new tenant would install a new structured cabling system rather than rely on the cabling left by the previous occupant. That practice was great for the business of those organizations that man- After weaving through a series of National Electrical Code ufacture, design, or install structured cabling systems. articles defining, and requiring removal of, abandoned cables, It was not so great, however, for the building pathways’ technicians must weave through masses like these to ensure fuel loads—which led to the removal requirements. compliance with the locally adopted building code. Teamwork needed stand their responsibilities to comply with the National As the past few years have shown, the entire situation has Electrical Code provisions on removing or tagging not been glorious for the owners of commercial build- unused cabling in buildings.” ings either. They essentially were left on the hook for After providing some background information on the cost of removing years’, and in some cases decades’, the NEC provisions addressing abandoned cable—and worth of abandoned cable. The Building Owners and noting that while the NEC itself is not law, many juris- Managers Association International (BOMA Interna- dictions in the United States adopt the document by ref- tional; www.boma.org) is a trade association that pro- erence into local codes—BOMA requests specific action vides education and advocacy for property owners and from its members. managers, covering all types of buildings. The orga- Again, directly from the position paper: “BOMA PATRICK McLAUGHLIN is chief editor of Cabling Installation & International recommends that building owners and Maintenance. Maintenance. managers survey their buildings to identify unused ➤ www.cable-install.com Cabling Installation & Maintenance ■ July 2007 ■ 25 C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 28. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F cable. If such wires exist, members should identify the wiring the local authority having jurisdiction.Though this author did by its rating (riser rated “CMR,” plenum rated “CMP”) and its not get an on-the-record comment concerning enforcement use (communications, alarm, security, etc.). The NEC 2002 and of abandoned-cable removal, some commented anonymously 2005 include language that allows some cabling to be retained that enforcement varies from jurisdiction to jurisdiction. if it is tagged for future use as long as it meets the permitted use criteria specified for cable installations (i.e., minimum of Words getting in the way? “CMR” and/or “CMP”). Any cable that does not meet the per- One potential reason for such unpredictable enforcement could mitted use specifications should be removed. be the sometimes-confounding wording within the NEC in which abandoned cable is referenced. The 2002 NEC includes Leasing language seven separate sections that mandate the cable’s removal, and The BOMA paper continues: “Your leases should clearly state an accompanying seven individual sections that define the that tenants must remove any cabling that is abandoned dur- term “abandoned cable.” ing the term of their tenancy, and/or your license agreements The seven sections of NEC 2002 that contain the definitions should require service providers to remove all wires upon the are: 640.2, 725.2, 760.2, 770.2, 800.2, 820.2, and 830.2. The termination of the contract. We recommend that you review seven sections with the removal language are: 640.3, 725.3, your leases and license agreements to ascertain exactly who 760.3, 770.3, 800.52, 820.3, and 830. The requirements for was responsible for the installation and/or abandoning of the removal are worded essentially the same, as follows: “The ac- cabling and whether you have recourse to recover any of the cessible portion of abandoned [application for which cables are funds needed to remove the wire. Next, make any amend- used, or cable type] cables shall not be permitted to remain.” ments necessary if you are not already protected by these Simply, the code-based requirements to remove abandoned agreements.” cables are not going away. How quickly those abandoned As BOMA pointed out to its membership, abandoned cable cables themselves are going away appears to depend on the is a code issue within those jurisdictions that have adopted tenacity of building owners/managers, along with the enforce- the 2002 or 2005 NEC. As such, it is subject to enforcement by ment procedures of the local AHJ. ____________ C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 29. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGSF LABELING DOESN’T GET ANY EASIER. NEW RHINO 6000. Exclusive features. Extreme control. Create labels on a PC and download to RHINO 6000. Or create and print your labels at the worksite. Either way, rugged and affordable RHINO 6000 simplifies labeling with advanced functions that are genuine time-savers. And RHINO labels stay stuck, long after you’re gone. • PC-connectivity for fast label downloads – and uploads for documentation purposes • Over 250 easy-to-find, pre-programmed industry terms and symbols save you time • ”Hot Keys” for instant wire and cable wraps, flags, vertical and fixed length labels, patch panels, distribution modules and more • Intuitive graphical interface lets you PC CONNECTIVITY create, edit and preview multiple labels on our largest backlit LCD • Save and recall over 1,000 custom labels including industry terms, graphics, logos WIN and symbols • Integrated impact bumpers • Prints on RHINO labels up to 1” wide www.rhinolabeling.com __________________ FOR YOUR ENTER YamahaTO WIN One of Five CHANCE Rhino 4x4s! © 2007 DYMO - A Newell Rubbermaid Company 29124 No purchase necessary to enter or win. A purchase will not increase your chance of winning. Open to legal residents of the 50 United States and D.C., age 21 or older. Void where prohibited. Enter online at www.rhinopromo.com between 12:00:00 am EST 3/8/07 and 11:59:59 pm EST 11/30/07 (“Promotion Period”), Details at www.rhinopromo.com or at participating industry tradeshows and retailer events during the Promotion Period. Subject to official rules available at www.rhinopromo.com. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGSF
- 30. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F Starting with an advantage. From day one, the new Tyco Electronics brings many advantages to our customers, investors, employees and communities. As a $12.8 billion company, with a 60-year head start, we’ve been at the forefront of the explosive growth in electronics worldwide. With nearly 100,000 employees in more than 45 countries, and a peerless reputation in engineering, our approximately 500,000 products include electronic components, network solutions and wireless systems. Tyco Electronics is committed to the technologies that bring advantages to everyone’s life every day. tycoelectronics.com TE Logo and Tyco Electronics are trademarks. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 31. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F www.cable-install.com technology Twisted-pair options for 10-Gigabit Ethernet M any companies are planning to install networks with the ability to transmit 10-Gbit/sec Conducting appropriate tests will help ensure your medium of choice is ready for Ethernet to meet the ever-increas- ing demand for bandwidth and im- high-frequency, high-speed transmission. proved response times. The need for higher bandwidth first manifests itself in the back- bone cabling or in data centers. Shielded cabling systems are entering center stage in the promotional battles for market share. The question whether to select, specify, and install unshielded versus shielded has consequently become the topic of the day. The Institute of Electrical and Electronics Engineers (IEEE; www.ieee.org) completed and approved a new chapter in the Ethernet standard (802.3) to enable 10-Gbit/sec Ethernet transmission over twisted-pair cop- per cabling. This implementation, called 10GBase-T, is specified in a standard that supports both unshielded twisted-pair (UTP) and screened or fully shielded twist- ed-pair (STP) cabling systems. This article explains the transmission-performance requirements for the twisted-pair cabling system defined in the 10GBase-T standard. It will also discuss the following questions: Whether using Unshielded Twisted Pair (UTP) or newer Shielded • Is the familiar UTP cabling no longer a viable choice? Twisted Pair (STP) cabling, successful transmission depends on • Has shielded cabling become the new solution for high-quality workmanship, such as maintaining the twist rates high-speed applications like 10GBase-T? all the way into the jack. Twisted-pair transmission requirements ry 6 cabling standard defines the transmission perfor- To achieve the 10-Gbit/sec data rate, each wire pair mance of the cabling over the frequency range from in the twisted-pair cabling must be able to transmit 1 through 250 MHz. 800 million symbols per second (data rate of 800 Mega The cabling standards characterize the performance Baud). A “symbol” is a voltage level; a new symbol must of twisted-pair data cabling using a signal-to-noise be transmitted every 1.25 nanoseconds (or 1.25 billionth ratio (SNR) analysis. This method defines: of a second). To support this very high rate of signal • The minimum required signal strength (or the max- transmission, the cabling performance parameters are imum signal loss allowed) over the frequency range specified up to 500 MHz. In comparison, the Catego- of interest—in this case, over the range 1 through 500 MHz; HUGO DRAYE is marketing manager for Fluke Networks’ certification tools (www.flukenetworks.com). He holds a Master’s degree in electrical ____________ • A number of noise parameters or disturbances that engineering from the University of Louvain, Belgium, and an MBA from cannot exceed established values over the same fre- Seattle University. quency range. The specified noise parameters ➤ www.cable-install.com Cabling Installation & Maintenance ■ July 2007 ■ 29 C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 32. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F are related to crosstalk between wire pairs in the cable and other cabling installation issues. IEEE 802.3an development signal reflection on each wire pair measured by the return has been completed and was approved by it standards board loss parameter. in June 2006. Because of the very high frequency range required for The cabling industry is undertaking two sets of activities: 10GBase-T, the crosstalk requirements must be expanded to • Guidelines for cabling compliance with the transmission include not only the crosstalk that happens between wire pairs requirements of 10GBase-T; within each cabling link, but also to include the crosstalk that • A new cabling standard that delivers better transmission is induced from wire pairs in adjacent cabling links. The lat- performance than Category 6, called Augmented Catego- ter is called alien crosstalk. The performance of each individ- ry 6 (Category 6A) or Augmented Class E (abbreviated ual cabling link is certified by the “in-channel” tests, while Class EA by the International Organization for Standard- the alien crosstalk performance or the coupling between wire ization [ISO]). pairs in adjacent links is to be certified by the “between-chan- In the North American market, the Telecommunications Industry Association (TIA; www.tiaonline.org) is the lead- UTP vs. screened UTP cable construction ing standards body for data communications cabling. The ISO, UTP STP meanwhile, develops, publishes, and maintains standards for Conductor Conductor the worldwide market. Both standards bodies are involved Insulation Insulation with the two activities mentioned above. Pair Pair Sheath Pair shield Cabling guidelines for compliance with 10GBase-T Sheath The TIA published a document titled Telecommunications Systems Bulletin 155 (TIA TSB-155), which contains the S/UTP S/STP guidelines and performance criteria by which any cabling Conductor Conductor system can be evaluated for compliance with the cabling Insulation Insulation transmission requirements for 10GBase-T. The guidelines Pair Pair in TSB-155 address the in-channel performance (test Shield Pair shield parameters that define the performance of an individual Sheath Cable shield cabling link over the frequency range from 1 through Sheath 500 MHz) and the between-channel performance Source: Fluke Networks (signal coupling between adjacent links commonly referred Adding a foil shield around the four pairs of Unshielded Twisted Pair to as alien crosstalk). The ISO is in the process of creating a (UTP) creates Screened UTP (S/UTP). Wrapping a foil shield around Technical Report (TR 24750) that serves the same purpose, each pair creates Shielded Twisted Pair (STP). Screened STP (S/STP) and intends to provide the same guidance as the TIA adds a foil screen around all four shielded wire-pairs. TSB-155 document. (These guidelines do not suppose a specific Category or Class of cabling, but it will be nel” test parameters. difficult to meet the performance established by TSB-155 How can you be assured that the installed cabling system [TR 24750] for any cabling lower than Category 6 or Class E.) will support 10GBase-T transmission? Industry standards define the test parameters as well as the measurement method- New cabling standards ology to assure compliance of installed cabling systems. This Both TIA and ISO are developing a new cabling type called testing procedure is called cabling certification. Augmented Category 6 (Category 6A) or Augmented Class E (Class EA). This new cabling will offer better performance Applying the standards than Category 6 or Class E cabling. The performance of the The IEEE has been the organization to develop, expand, and in-channel and between-channel parameters will be defined maintain the “Ethernet” standards, in its 802.3 set of spec- up to 500 MHz. The standards activities that defi ne the Aug- ifications. IEEE project 802.3an developed and defined the mented cabling systems are not yet complete, even though system to transmit 10-GbE over twisted-pair cabling. This many manufacturers offer Category 6A (Class EA) solutions project encompasses all aspects of the network implementation, in the market. The TIA development is further along than the including the minimum capability of the cabling link between ISO development, and will be published as Addendum 10 to a transmitting device and a receiving device. The IEEE is the TIA standard 568-B.2 (TIA-568-B.2-10). This TIA docu- focused on the transmission performance of the end-to-end ment is, at the time of this writing, in Draft 7.0. cabling link independent of the number of connections or An important reason for the new cabling systems is ➤ 30 ■ July 2007 ■ Cabling Installation & Maintenance www.cable-install.com C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 33. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F From copper to fiber, General Cable has a 10 Gigabit Ethernet solution for you. We’re proud to ® offer high-quality I want options. and ® cables that support 10 Gig, and can be customized to fit any network, including: • Backbone to horizontal drop • Outside plant to inside your data center • 37m to over 30km With more than 100 years of wire and cable experience, General Cable has the resources, product offerings and applications support you can depend on. General Cable has the solutions. Delivering Solutions that Keep You Connected (800) 424-5666 www.generalcable.com C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 34. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F that Category 6 cabling may not satisfy the between-chan- day network operations than cabling with merely good (say, nel performance (alien crosstalk performance), especial- 5 dB) margins? We believe the answer is, “No.” The distinc- ly for longer links. TSB-155 states that Category 6 “should” tion is not noticeable. It is true that a reasonable margin of a perform satisfactorily for links up to 37 meters long; it may few dB above the minimum requirements protects network well work up to 55 meters, and it may need some mitigation traffic from spurious and random EMI events that undoubt- if you want to run 10GBase-T over Category 6 links longer edly occur. Also, remember that the dB scale is not a linear than 55 meters. scale. For example, a worst-case alien crosstalk margin of In a real-world installation, the alien crosstalk performance 6 dB means that at the worst-performing frequency, the mea- of installed Category 6 cabling depends on many factors. The sured alien crosstalk signal is half of the allowable signal level for alien crosstalk. Do cabling systems with very good margins (15 dB or Considering unshielded more) perform better in everyday network operations In the selection process between than cabling with merely good (say, 5 dB) margins? We unshielded and a variety of screened and shielded cabling options, UTP believe the answer is, “No.” remains the more economical sys- tem. Installation contractors in the best advice we can give: Test alien crosstalk performance of North American market are familiar with unshielded ca- installed Category 6 cabling before deploying 10GBase-T. If ble types. Category 6A UTP may, however, bring a few new the links pass the requirements specified in TSB-155, they are challenges. ready to support 10GBase-T. One design goal for the Cate- Many of the Category 6A UTP implementations have big- gory 6A system states that it shall satisfy the alien crosstalk ger outside diameters, and the density in patch panels has performance for 10GBase-T for a full 100-meter horizon- decreased. The increased outside diameter (OD) creates a tal channel. greater distance between wire pairs in adjacent links, thereby reducing the between-channel signal coupling. A bigger OD Starting from scratch for the cabling does, however, affect the fill rate in ducts and A new cabling installation should be treated as a long-term pathways. An increase in the OD of 0.1 inch, from 0.25 inch investment. Electronic devices are typically replaced several to 0.35 inch, represents an increase in fi ll volume of 21%. It times within the lifespan of the cabling system. Replac- also affects the ease of handling and bending of cable bun- ing a cabling system is a much more disruptive and costly dles. If you select a UTP Category 6A cable with an increased project than exchanging network devices like switches and outside diameter, pathway layout, duct sizes, and cable sus- routers. You should, therefore, consider the best cabling pension should be designed to accommodate the OD param- system for the time horizon of your investment. In a new eter of the cable. data center design, this decision should favor a Category 6A Alien near-end crosstalk (NEXT) is susceptible to the per- cabling system. formance of the cabling near ends of the link, most noticeably As mentioned earlier, shielded cabling types are getting in patch cords, patch panels, and the wire management in the much attention in the Category 6A market. The standards racks. To alleviate or mitigate alien crosstalk problems in UTP do not favor UTP over STP construction. Instead, as was installations, the Category 6A patch panels support less den- explained earlier, the standards set performance limits sity and trade off that density for alien crosstalk performance for the in-channel transmission capability as well as for the by allowing more space between jacks in the panel. between-channel capability. Alien NEXT for UTP cabling can also be improved by We have witnessed the testing of many UTP cabling adjusting the practices of bundling in the wire management installations that fully meet the requirements spelled of the racks. Allowing more free flow between the cables and out in the proposed Category 6A standard. Th e shield- placing wraps or hook-and-loop ties a few feet apart, rather ing in the screened cable types offer better electromagnetic than a few inches apart, will help. Also, smaller bundles are interference (EMI) performance and diminishes the sig- more manageable and will require less time to conduct the nal coupling between wire pairs in adjacent cabling links. A alien crosstalk tests. shielded cabling installation, if properly installed, should offer better margins for the alien crosstalk tests. Shielded/screened options This raises an interesting question: Do cabling systems with It is important to note that there are several different varieties very good margins (15 dB or more) perform better in every- of shielded cabling, and that a series of new acronyms has ➤ 32 ■ July 2007 ■ Cabling Installation & Maintenance www.cable-install.com C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 35. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F PROVEN EXPERIENCE IN SCREENED AND SHIELDED CABLING 10Gb/s SCREENED AND SHIELDED SYSTEMS SINCE 1999 OVER A MILLION SCREENED AND SHIELDED PORTS INSTALLED SUPPORT BUILT ON GLOBAL EXPERIENCE By now you know the benefits of screened and shielded cabling - superior 10Gb/s performance, elimination of alien crosstalk, reduced cable diameters, less restrictive installation practices and more. But what about the company behind the products? Siemon has produced and installed 10Gb/s screened and shielded cabling systems since 1999. And now, as they gain popularity, you can count on Siemon’s industry-leading experience and support to help you install a superior 10Gb/s cabling solution...In the end, experience counts. CONNECTING THE WORLD TO A HIGHER STANDARD W W W . S I E M O N . C O M _________________________ C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 36. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F emerged to describe the different cable types. In the most com- other codes enforced by local jurisdictions. mon construction type, the wire pairs are fully covered with In the field, you can verify that the ground potential meets a metal foil. This construction used to be called FTP (foiled the difference requirement before you connect the other end. twisted-pair) or ScTP (screened twisted-pair) but is now often Connect the shield at one end, then measure the alternating- referred to as F/UTP (foiled/unshielded twisted-pair) or S/UTP current voltage between the shield and the ground connection (screened/unshielded twisted-pair). An alternate construction at the other end using a digital voltmeter that covers a band- provides a foil around each individual wire pair. And the Cat- width of 100 kHz or better. egory 7 cable construction provides a foil around each wire The performance in or near the patch panels plays a sig- pair, then a foil around the four foil-screened wire pairs and nificant role in maintaining the effectiveness and protection lastly, a braided screen woven of thin wire around that out- delivered by a shielded cable. Installation workmanship and side foil. This cable construction is also called SSTP (shielded experience play a big role in the quality of the installed sys- screened twisted-pair). The flexibility and manageability of tem. Field certification verifies that the desired quality has SSTP is much less than that of UTP. been delivered. The foil screen or shielding is effective in preventing high- Shielded cabling may also require additional testing in frequency signal interference between wire pairs in adjacent Power over Ethernet (PoE) applications because the shielding cables. Good cable balance offers great immunity from inter- tends to retain heat within the cable, which increases return loss ference caused by lower-frequency signals. To obtain these and reduces cable life. The proposed 802.3at standard, which benefits from screens, you must follow a number of very increases the maximum PoE power from 13 watts to 30 watts, important installation practices. The key concerns are the makes this issue more critical. 802.3at will set maximum shield must fully surround the wire pairs in the cable from temperature limits for unshielded cabling but does not yet end to end, and must provide proper grounding. address shielded cabling. The shield must be kept intact over the entire length of the Because PoE is not often used within data centers, the use cable, and must fully surround the cable and connecting hard- of shielded cabling in the data center sidesteps this potential ware. If the shield is, for example, formed into a pigtail over problem. If PoE is run over shielded cabling, the cable should the last inch of the cable, it will reduce the protection against be tested periodically for return loss to assess whether any EMI and alien crosstalk. In addition, avoid splitting the shield thermal damage may have occurred. at sharp bends in the cable. The shield is typically a ribbon of aluminum foil that is wrapped around the cable. If the cable is Shielding against aliens bent at too sharp of a radius, the shield may separate, thereby The IEEE 10GBase-T standard includes requirements for reducing the effectiveness of the shield and its ability to pro- cabling; the TIA TSB-155 and ISO TR 24750 documents tect against alien crosstalk. incorporate these requirements. The new cabling standards The shield must be grounded on both ends of the link. It is under development—Category 6A and Class EA—aim to deliver often said that a shield is 90% effective when it is grounded a future-ready cabling system that supports the full at one end of the link. Such a shield continues to protect the 100-meter channel requirements for 10GBase-T. These new wire pairs against many external high-frequency disturbances, standards also aim to support possible future developments. but an open-ended shield may allow resonances at certain We can predict that alien crosstalk performance is going to be frequencies. A resonance creates the chance that the signals part of any future high-speed network application. Because of the couple into the data wire pairs, creating a significant alien emphasis on alien crosstalk, screened/shielded cabling types crosstalk disturbance at those individual frequencies. Field are gaining attention in the market. Properly installed shield- certification may record very low margins for alien crosstalk ing enhances EMI performance in general and alien crosstalk at those frequencies. performance in particular. Because the shield should be terminated to ground at both Certification testing has always been an important part of ends, it is critical that the ground potential at both ends is cabling deployment. It becomes a very important step if you approximately the same to avoid any ground-loop currents. are interested in deploying 10GBase-T over installed twisted- The TIA-607 standard on grounding and bonding allows a pair cabling. Certification of new Augmented cabling systems, maximum difference in ground potential of 1 Vrms (Volt root whether constructed with unshielded or shielded components, mean square) between the two ends. This rule requires that delivers the assurance that the cable system is ready to sup- the telecommunications system is grounded throughout in port 10GBase-T and beyond. In-channel testing should be compliance with the TIA-607 standard and that the electrical performed on 100% of the links, and alien crosstalk test- system in the building is correctly grounded and fully com- ing should be performed on a selected number of disturbed plies with rules spelled out in the National Electrical Code and cables in the cabling installation. 34 ■ July 2007 ■ Cabling Installation & Maintenance www.cable-install.com C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 37. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F CABLING SYSTEMS MANUFACTURING AND DISTRIBUTION cabling systems Modular Plugs Patch Cords Copper Cables Patch Panels Fiber Optic Cables Optical Connectors Cross Connection Cable Trays Installation Accessories Access Floor Cabinets and Racks Tools EXCELLENT QUALITY, REASONABLE PRICE, FAST DELIVERY Hyperline Systems 2212 Gladwin Crescent, unit C7, Ottawa, Ontario, K1B 5N1, Canada Phone: 1-613-736-8500, toll-free: 1-866-63-HYPER (1-866-634-9737), fax: 1-613-736-9752 www.hyperline.com C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 38. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F P R E - T E R M I N AT E D , PRE-TESTED, PRE-ANYONE ELSE. PROVEN PERFORMANCE. PROVEN RELIABILITY. RAPIDNET. When it comes to pre-terminated network cabling solutions, HellermannTyton is the leader. Pioneering the first Category 6 pre-terminated network cabling system, HellermannTyton has, for years, delivered successful RapidNet installations across the globe – including leading US data centers in government, financial, healthcare, educational and enterprise applications. RapidNet is available in copper and fiber modular configurations and offers the time tested performance and reliability required for system critical applications. Assuring on-time project completion in the most demanding circumstances, RapidNet has been verified to reduce installation time by 85% over traditional methods. RapidNet has been proven in the field, now let us prove to you how RapidNet can enhance your business. Go online for more information and register for your free “Proven in the Field” t-shirt, www.hellermann.tyton.com/cm1 phone: [80 0] 822 4352 email: info@htamericas.com w w w. h e l l e r m a n n .t y t o n . c o m /c m1 ____________________ C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 39. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F www.cable-install.com data center Products and technologies meeting myriad challenges T he technological food chain that is the data center yields chal- lenges at every turn. Over the past Latest innovations aim to alleviate problems associated with cable management, power consumption, security and, oh- several months, we have detailed by-the-way, signal transmission. on these pages the myriad consid- erations that go into planning, deploying, and admin- automated access control and monitoring. Managed istering networks and their structured cabling systems with soft ware via Ethernet connection, the system elim- within data centers. High-density networks using blade inates keys by assigning each user with access codes servers present concerns that include cable manage- or proximity cards to open ment, power use, and potentially cabinet security. specific cabinets, while And that is just the proverbial tip of the iceberg. maintaining a detailed On a monthly basis, we try to show you glimpses of data log of access attempts, the “bottom of the iceberg” for professionals tasked with configuration changes, administering data center cabling systems. This month, and modifications to we take a look at some of the most recently introduced cabinet handles. Com- products and technologies that focus specifically on ponents include a com- data center transmission and administration. munications module, electronic lock upgrade High capacity fiber manager kit, electronic lock module, keypad module, and The company’s FiberGuide fiber management system proximity card reader. Each Electronic Locking now includes a 24 x 4-inch system, doubling the network System is customized to meet specific data center capacity of typical 12-inch systems. requirements. FiberGuide is designed to protect CHATSWORTH PRODUCTS and route optical-fiber patch cords, www.chatsworth.com multi-fiber cable assemblies, and intra-facility fiber cable to and Web-enabled power control from fiber splice enclosures, dis- The iBootBar remote power distribution and manage- tribution frames, and fiber-optic ment solution lets you reboot or power-control remote terminal devices. It also is built to ensure that a 2-inch telecom equipment via an IP network using and Internet minimum bend radius is maintained throughout. browser. It provides control of eight A/C power outlets, ADC www.adc.com Cabinet security system The Electronic Locking System for the company’s and each can be turned on, off, or cycled for power-on line of cabinets is an IP-addressable locking solution reset. A serial port or optional internal modem (sup- designed to increase data center security by providing ports data and voice) provides out-of-band access when PATRICK MCLAUGHLIN is chief editor and STEVE SMITH is executive the network is unavailable. Supporting Telnet, SNMP, editor of Cabling Installation & Maintenance. SMTP, and SSL security, iBootBar can be configured ➤ www.cable-install.com Cabling Installation & Maintenance ■ July 2007 ■ 37 C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 40. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F to monitor networked equipment and tor, enabling longer reach, thinner cable will automatically reboot the equipment interconnects, and reducing kilowatts in in the event of a system freeze. the data center. Combining a four-chan- DATAPROBE nel equalizer with integrated higher layer www.dataprobe.com functionality designed to ensure full com- pliance with the QSFP specification, the Data center power reducer technology eliminates the need to con- QLx4000 Lane Extender ICs are em- vert to fiber-optics. These Lane Extend- bedded in an ultra-small QSFP (quad ers come in a 4 x 7-mm package, and can small-form-factor pluggable) connec- be integrated in any cable shell, line card, or backplane. Fully embeddable units fea- ture 240 mW power dissipation and 10 to 34 Gbits/sec bandwidth range. QUELLAN INC. www.quellan.com 10-Gbit/sec patch cord These 10-Gbit/sec-capable, RJ-45-style patch cords feature a proprietary color- coded snap-on clip that can be added or removed while the plug is inserted or dis- engaged, allowing improved flexibility in patch field identification and manage- ment. The 10G 6A F/UTP MC cords in- clude an ultra-slim boot designed for tight side-stackability in high density patching environments, such as blade servers. The boot provides integrated “cantilevered” latch protection that limits snagging when removing cords and allows the latch to be operated from further back on the plug. The plug also features an enhanced strain relief boot designed to ensure proper bend radius, flexibility, and boot retention. Coupled with the company’s patented cross-pair metallic isolator and 360-de- gree crimp, the plug maintains cable pair geometry and eliminates deformation. As part of a 10G 6A F/UTP end-to-end channel, these MC cords meet or exceed all 10GBase-T standard requirements, including alien crosstalk parameters. _________________ SIEMON www.siemon.com 38 ■ July 2007 ■ Cabling Installation & Maintenance www.cable-install.com C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 41. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F Built with your system in mind. UFS from Cablofil is a wire mesh tray system for www.cablofil.com 800-658-4641 underfloor cable management that’s adaptable to any 8319 State Route 4 installation. It’s self-supporting so it won’t void the warranty Mascoutah, IL 62258 USA of your floor and 2’ tray sections can be installed through a single floor opening. Multiple height supports are available in kits, making UFS easy to order and install. And UFS integrates with our 10’ tray — an industry first. UNDER FLOOR CABLE MANAGEMENT MADE EASY. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 42. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F wireless www.cable-install.com WLAN goes fat to thin and back again A s the wireless LAN (WLAN) industry looks ahead to the high speeds promised by the IEEE 802.11n protocol When the industry moved to centralized wireless solutions with switch-based controllers, many thought the war and the growing expectation for more between “fat” and “thin” was over. But critical applications to successfully run over wireless, the architectures now it appears the battle is still on. are evolving. Legacy Wi-Fi networks aimed at the enterprise mar- traditional WAPs were first used for critical vertical ketplace included autonomous “fat” wireless access applications, such as inventory management, and were points (WAPs) that didn’t offer adequate management, a huge benefit to several types of businesses. security, and roaming capabil- As the number of WAPs increased, ities. Later, centralized systems however, they became increasingly used “thin” WAPs and moved the difficult and time-consuming to intelligence and security policies to manage. Manual configuration a main switch-based controller to of each WAP was often required get around the challenges experi- to set power level, channel, and enced with legacy systems. security policies. In addition, many But the war between “fat” and encountered security breach- “thin” may not be over. Some in the es due to fi rst-generation secu- industry are discovering that the rity standards that proved to be centralized controller approach easily broken. may not be the best architecture to “The security issue with traditional handle the ever-increasing number fat WAPs wasn’t so much based on of Wi-Fi users, demand for faster the architecture and the fact that wireless speeds, and emerging the intelligence resided in the WAP, Wi-Fi applications. but more because the security stan- Is it possible that wireless LAN dards were not robust at that time,” technology is coming full circle says Frans Versluis, senior manager with intelligence being put back of wireless marketing for ADC into the WAP? (www.adc.com). In addition to __________ Ortronics’ centralized wireless system features security and management issues, Losing the fat the very small Wi-Jack WAP that works in con- the process of having to re-authen- The first autonomous WAPs were junction with an Aruba Networks’ controller. ticate with each WAP when roam- stand-alone devices with routing ing provided limited mobility. capabilities able to handle everything from network To solve the management, security, and mobility processing and radio-frequency (RF) communica- issues, a centralized management approach was needed tion to authentication and encryption. Many of these to perform signal and channel adjustments and set BETSY ZIOBRON is a freelance writer and regular contributor to Cabling security and roaming policies from one central location. Installation & Maintenance. She can be reached at: bziobron@comcast.net Maintenance. Functionality and intelligence was moved from the ➤ 40 ■ July 2007 ■ Cabling Installation & Maintenance www.cable-install.com C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 43. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F SHIELDED Leviton makes it easy. The highest level of security: Leviton’s Shielded Solution. Our Rockwell Encompass™ Approved products secure critical data in sensitive environments including Government, Department of Defense, and Healthcare. Our Shielded Solution improves isolation of data signals. This protects your information by reducing signal emissions from inside your network and reducing Electromagnetic (EMI) and Radio Frequency Interference (RFI) from outside your network. Cat 6 connectors are IEEE 802.3an compliant when used with approved cable suppliers. For more information call, 800.922.6229 or visit www.leviton.com. LEVITON’S SHIELDED CONNECTIVITY SOLUTION Rockwell Encompass™ Approved Features 1RU 24-port patch panel No 110 punch-down tool required Used in conjunction with STP cabling Durable connector housing Protects against EMI & RFI leviton.com :: 800.922.6229 :: FAX 425.483.5270 ISO 9001:2000 registered quality manufacturer :: © 2007 Leviton Manufacturing Co., Inc C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 44. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F WAP to a centralized WLAN controller, which is essentially is transmitted wirelessly from the client to the WAP and then a switch responsible for WAP configuration and administer- over the structured cabling system to the controller. ing security policies while also routing data packets from and Panduit teamed up with Cisco Systems in late 2005 to deliver to the WAPs. the Panduit Wireless Connection Solution, a combination of “In the past, the mentality in the enterprise was that wire- Cisco’s WAPs, controllers, and antennas, and Panduit’s WAP less would be used for isolated locations, with a few WAPs to “Most people are underwhelmed with the performance cover open areas and conference rooms,” says Bob Elliot, product of Wi-Fi networks and would rather connect to the development manager at Panduit (www.panduit.com). “Distributed ____________ wired network. Users are wanting to do more than just systems with intelligent WAPs worked well for that. When cus- e-mail and browsing over the wireless LAN, and putting tomers began looking for ways to use wireless technology through- more intelligence at the edge actually improves speed.” out the entire enterprise, the model changed to having several tens or even hundreds of WAPs. enclosures, PoE patch panels, and connectivity. The system That’s when customers realized that programming WAPs is available with either distributed (fat) or centralized (thin) from one centralized controller made more sense.” WAPs to suit various types of deployment. “Customers are now talking wired and wireless in the same Getting into thin sentence,” says Panduit’s Elliot. “You can’t separate the two, Vendors such as Cisco (www.cisco.com) and Aruba Networks which is why Panduit now offers both wireless and wired (www.arubanetworks.com) led the way with solutions.” centralized controller-based systems, and This year, Belden (www.belden.com) many cabling and connectivity vendors entered the wireless networking either jumped on board with their own arena with even “thinner” WAPs. offerings or teamed up with Cisco The Belden Wireless Solution fea- and Aruba. Ortronics/Legrand tures what is known as chan- (www.ortronics.com), for ex- ______________ nel blanket technology, which ample, was the fi rst structured is deployed using edge switch cabling company to market a architecture (see figure, “Four- centralized wireless system (in radio WAP topology, page 44). late 2004) when they teamed up Th is setup prevents having to with Aruba Networks (see pho- send packets back along the to, page 40). The Ortronics so- structured cabling to a central- lution includes their own Power ized controller, which ironically over Ethernet (PoE) injectors and is considered one of the key dual-band/dual-radio Wi-Jack benefits of moving back to fat WAPs that work in conjunction with WAPs (see figure, “Connecting Aruba Networks’ controllers. WAPs without centralized controller”, “The Aruba controller manages each Wi-Jack page 44). by downloading the configuration to the WAP,” explains ADC’s WFX Wi-Fi In this scenario, the WAPs are so Tony Walker, wireless marketing manager for Ortronics/ Array features an simple that they do not even require Legrand. “Users can automatically manage the number of embedded control- a MAC or IP address, and they are users, power levels, and the coverage area based on defined ler with integrated directly connected to the edge switch that thresholds. If a WAP goes out of service, the controller recog- 802.11b/g and makes all packet routing and security nizes that, because every 30 nanoseconds, it’s communicating 802.11a WAPs in decisions while delivering PoE to the with the WAP—and if it doesn’t get a response, it automatically one device. WAPs. The Belden technology allows powers up the surrounding WAPs to cover the area.” each WAP to operate on the same chan- According to Walker, the Wi-Jack WAPs are connected nel to create channel blankets with no co-channel interfer- through the structured cabling system so that the data stream ence or latency, as opposed to the more common method 42 ■ July 2007 ■ Cabling Installation & Maintenance www.cable-install.com C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 45. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F of individual Wi-Fi cells. The company says this scenario on the network. And if I’m transferring a file to a person using allows for easily increasing the density of WAPs to provide the same WAP on the same network, it makes sense for the more capacity. data stream to bypass the structured cabling and controller by “In our wireless solution, the WAPs basically become going to the WAP and then directly to the other person. Th is just antennas, similar to An intelligent “fat” array a distributed antenna system,” explains Brad • 12 60˚ sectors provide 100% A12 Listening only RF overlap for redundancy A1 ABG1 A1 Meeks, director of wire- A1 and failover 1 0 A2 less marketing for Belden. = ABG4 ABG3 + + A9 A8 A4 A3 • One non-overlapping channel per sector “Association between the A6 A5 A7 ABG2 • High-gain antenna system for client and the network never increased range occurs at the WAP, but at the edge switch.” ADC’s WFX-3900 Array is an intelligent “fat” WAP that features an embedded controller with four 802.11b/g Meeks adds, “Depending and twelve 802.11a integrated WAPs to provide a maximum of 864 Mbits/sec of throughput for a larger area. on the density, a client may be communicating with two or three WAPs at any given time. is why some vendors are moving some processing intelligence When the client sends data, it is the edge switch that decides in back out to the WAP.” real time on a packet-by-packet basis which WAP the packet is received from. The switch bases that decision on sev- Coming around again eral parameters, including interference, number of users, Trapeze Networks (www.trapezenetworks.com) is one com- and capacity.” pany contributing to this trend. Their Smart Mobile WLAN Belden’s solution includes two-radio WAPs to provide two architecture features WAPs that can perform encryption, separate channel blankets that can be set up as two sepa- enforce policy, and forward data, depending on application rate networks—ideal for specifying one channel for voice and needs. According to the company, this offloads some of the another for data. Later this year, the company will introduce a controller’s responsibility, leaving it free to enforce more four-radio WAP, PoE extender, and management console soft- stringent policies and enable fast, seamless identity-based ware for monitoring and configuring each edge switch. roaming. Recent industry buzz has focused on moving intelligence ADC’s WFX Enterprise Wi-Fi Solution is an example of a back into the WAP to either eliminate or reduce the use of a cabling and connectivity vendor supporting the idea of in- telligence in the WAP Third-generation WAP architecture (see figure, “An in- Independent access points WLAN switch WLAN array First generation: 1998-2001 Second generation: 2001-2005 Third generation: 2006-future telligent ‘fat’ array,” above). ADC’s WFX Wi-Fi Array com- bines an embedded controller and up to 16 WAPs in a single device to provide higher capacity over a larger coverage area— • “Fat” access points • “Thin” access points with • Array controller and • 802.11b dominant centralized switch integrated access points up to 864 Mbits/sec • Lacked centralized management • Addressed management and • Capacity and coverage maximized according to the com- security issues • Fewer devices, cost effective and simple pany (see photo page • Complicated and expensive 42, and figure “Third- ADC’s WLAN Array is a third generation device that puts the intelligence back into the WAP yet integrates several sector- generation WAP ized antennas to increase signal range and capacity. architecture,” left). “The controller re- switch-based controller. While still a proponent of centralized sides within the array, has one MAC address, and acts as systems for their features and capacity through dense deploy- a switch with up to 2-Gbit switching capability,” explains ment, Ortronics’ Walker is noticing the same trend: “If you ADC’s Versluis. “We still take advantage of centralized capabil- have a controller managing 48 WAPs, that’s a lot of congestion ities by providing an out-of-band management platform ➤ www.cable-install.com Cabling Installation & Maintenance ■ July 2007 ■ 43 C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 46. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F that allows users to push out pro- files, radio settings, and security “As we move to the higher speeds offered by 802.11n information to each array.” and running more mission critical applications over Wi-Fi, Comparable to the differ- ence between a light bulb and do we really want to be backhauling all that traffic over a f lashlight, instead of using omni-directional antennas the LAN to a centralized controller?” that distribute signal equally in all directions, ADC’s WFX arrays feature sectorized os in the array.” According to Versluis, eliminating the antennas that focus signal in one direction over a longer controller an packing more radios into one device reduces distance. costs and simplifies deployment because there are significant- “A person sitting at 2 o’clock from the array would con- ly fewer devices required. nect through one of the array’s radios while someone at A new company, Aerohive Networks (www.aerohive.com), _____________ 6 o’clock would connect to another,” explains Versluis. recently put even more intelligence back into the WAP with “Anyone that stays within that 125,000-square-foot space the introduction of the “cooperative control” HiveAPs that never hits the wired network or has to worry about roam- act as switches and share information with each other over ing because the embedded controller manages all the radi- both wired and wireless media, completely eliminating the use of a switch-based control- ler (see photo, and figure, Connecting WAPs without centralized controller HiveAP cooperative control,” Cell-based system core architecture Channel blanket edge architecture page 46). In this solution, the company says, each individual LAN backbone Core ethernet LAN backbone HiveAP features cooperative switch control soft ware that provides Edge ethernet enterprise-class roaming, RF switch Edge ethernet Patch cable management, mesh networking, switch Patch cables WLAN L2 best-path forwarding, security, switch with PoE PoE injector WLAN switch IP1 and quality of service at the net- IP4 MAC4 MAC1 works’ edge. Direct Category 5e cable Direct Category 5e cable 3 Switch ports “Routers have information 3 PoE ports about the best route they can 3 IP addresses AP IP1 AP IP2 AP IP3 AP AP AP take for transmitting data; MAC1 MAC2 MAC3 Source: Belden we do that with our WAPs,” explains Stephen Philip, senior The Belden Wireless Solution connects very simple WAPs directly to an edge switch to eliminate the use of a director of marketing for Aero- centralized controller residing in the core network. hive Networks. “We can con- nect as many HiveAPs to the Four-radio WAP topology wired network as we like, and these WAPs also mesh together Channel blankets to communicate wirelessly as Channel 1 well. Th is allows cooperative with increased throughput RF control and automatic chan- Channel 6 nel selection between WAPs in with increased throughput the same hive, as well as the Channel 11 ability to intelligently pass with increased throughput user credentials from one WAP Rogue access point detection to neighboring WAPs for seam- less roaming.” Source: Belden The company also offers a By having WAPs all on the same channel, Belden’s 4-radio WAPs create four separate channel blankets that HiveManager appliance to pro- can act as individual networks with no co-channel interference or roaming latency. vide a single management ➤ 44 ■ July 2007 ■ Cabling Installation & Maintenance www.cable-install.com C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 47. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F Introducing Tri-Porter ™ (voice/data/video) The first triple-play tester that DSL-safe telephone test set network tester tone generator cable tester/verifier tone detector/cable finder coax mapper replaces 6 traditional testers. Tri-Porter™ is the ultimate “Triple Play” solution with over 50 separate features and capabilities that will make your job of assuring customers’ cabling systems easier than ever before. It combines a world-class speakerphone butt set with a full ethernet network tester that has active network negotiation capabilities, as well as line testing at 100Mbits to qualify VoIP. The video/coax tests include a unique tone generation technology that will let you trace signals thru splitters, traps and filters to find the other end of a cable link. It further detects RF energy and measures signal strength Tri-Porter™ (IVT600) includes a handy carrying case, along with of cable runs. Tri-Porter™ handles a full range of physical the 20-piece wiremapping sets, wiring tests for the fast, efficient delivery of IP-based voice, for remote discovery of telephone, data and video services for either the home or small office. network and coax cables. The perfect 21st century tool for 21st century needs. www.test-um.com C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 48. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F interface for config- uration, updates, and device Aerohive’s HiveAPs act as but are optimistic that the monitoring. switches and share infor- wireless LAN industry “The key difference between our system and a mation with one another will not move back to fat centralized control- ler-based system is that our over both wired and wire- WAPs. “It’s more difficult HiveManager is not a switch; it is only used to con- less media. to do a dense deployment figure the wireless net- work,” says Philip. “You can with fat WAPs, and the then turn it off, and the wireless network centralized model offers still functions because the capacity and ease of the WAPs move the management that cus- packets and make the tomers are looking decisions on who is for,” says Ortron- allowed where. In con- i c s / L e g r a n d ’s trast, if you turn off a Walker. “Howev- switch-based controller, the er, a year ago, the wireless LAN is down.” discussion was over and everybody was on board with Battle still on centralized solutions. Now, some people are In the the war between “fat” and “thin,” questioning if they really need all they’re buying with many solutions seem to lie somewhere be- tween like a centralized solution, or if maybe there’s something in Belden’s solution that features thin WAPs, yet eliminates the between.” use of a centralized controller by connecting WAPs directly to an edge switch. Cost, of course, continues to be a key issue Back to being fat? in this battle, and the idea that thin WAPs with switch-based Walker adds, “While I foresee some segmentation in the mar- controllers are cheaper may be a misconception. ket where fat WAPs may be ideal for customers that care more “Thin WAPs have always been thought to be cheaper, but about coverage and less about capacity, I don’t foresee the in- today’s equivalent autonomous and thin WAPs are dustry moving back to fat WAPs.” essentially the same price, and the controller is still very But ADC’s Versluis disagrees: “Others are now doing what expensive,” says Aerohive’s Philip. “The idea that we would we’ve been advocating for a long time. We don’t believe in have a major cost reduction at the WAP by moving the intel- sending every packet back along the wired network when ligence to a centralized switch didn’t really eventuate.” people are communicating wirelessly, which is why we’re Proponents of centralized systems see the recent trends not a proponent of putting the switch anywhere but at the edge.” HiveAP cooperative control Versluis continues, “Most people are under- whelmed with the performance of Wi-Fi net- Wired LAN works and would rather connect to the wired network. Users are wanting to do more than just e-mail and browsing over the wireless LAN, and putting more intelligence at the edge actually im- proves speed.” Aerohives’ Philip concludes, “There are many dis- Wireless LAN advantages to a controller-based approach. First of all, the controller is a single point of failure for the wireless LAN, and it’s an extremely expensive de- vice. Adding extra controllers for redundancy, and Wired connection Layer 2 Ethernet switch having one controller for each branch office that HiveAP Wireless connection Cooperative Layer 3 Ethernet switch only requires a few WAPs is extremely cost-pro- control signaling Source: Aerohive hibitive. And as we move to the higher speeds of- fered by 802.11n and running more mission critical Aerohive’s WLAN system is based on what the company calls cooperative-control applications over Wi-Fi, do we really want to be technology, which the company says provides enterprise-class roaming, RF manage- backhauling all that traffic over the LAN to a cen- ment, mesh networking, best-path forwarding, security, and quality of service. tralized controller?” 46 ■ July 2007 ■ Cabling Installation & Maintenance www.cable-install.com C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 49. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F Utilizing Fiber Optics with Data Center Copper Electronics WEBCAST Are your cable trays about to collapse from copper cable over- load? Learn how you can save more space in your data center’s 7 200 cable trays by moving from copper cabling to fiber-optic cabling T 1, GUS EGISTRATION webcast while utilizing your current copper equipment infrastructure. AU REE R This webcast will show you how you can reduce the space you F com/ tall. need for cabling by 93% and lower your cooling costs. bleingins NOW! ww.ca N UP Join Corning Cable Systems and Transition Networks to learn w SIG about integrating fiber optics into your data center while leverag- ing your copper electronics. The two industry leaders have joined to develop the highest-density Gigabit Ethernet media conversion solution available today with the scalability, reliability and rapid deployment advantages of plug & play universal systems. Date: August 1, 2007, Time: 1:00 p.m. EDT Moderated by: Patrick McLaughlin, Chief Editor, Cabling Installation & Maintenance Sponsored by: _________ Photo Credit: BigStockPhoto.com C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 50. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F MicroScanner 2. Envision cable verification raised to a higher power. Introducing MicroScanner2 – a revolutionary way to verify voice/data/video cabling and services. It streamlines verification testing by displaying key results – wiremap, pair lengths, cable ID and distance to fault – all on one bright oversized screen. Plus, its built-in RJ11, RJ45, and coax ports test virtually any low- voltage cable with no need for adapters. With all this plus 10/100/1000 Ethernet, POTS, and PoE service detection, it’s clear this is one high- powered tester that’s going to streamline your voice/data/video testing in a blink of an eye. Take a virtual demo today. Visit www.flukenetworks.com/SeeMicroScanner2 and find out how you can win one for yourself. MicroScanner2 C a b l e Ve r i f i e r N E T W O R K S U P E R V I S I O N ©2007 Fluke Corporation. All rights reserved. 02114 C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 51. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F Compiled by Steve Smith Anixter lab integrates networking, security A 4,000-square-foot lab designed to educate, demonstrate, and eval- uate networking and security infra- Leatherwood, senior vice president of marketing for Anixter Enterprise structure products has been unveiled Cabling and Security at telecom distributor Anixter’s (www. ___ Solutions. anixter.com) corporate headquarters in The ISL will be staffed Glenview, IL. by professionals who are The UL-certified Infrastructure Solu- experienced in a variety tions Lab (ISL) replaces separate network- of technologies. Custom- ing and security labs with an integrated ers can evaluate a variety facility designed to reflect actual use of networking and securi- of the latest technologies being used in ty infrastructure solutions the field. Anixter says the lab employs in a “real world” environ- current security and networking “best ment so that they can Anixter’s Infrastructure Solutions Lab lets users evaluate numer- practices,” and highlights standards and select the systems that ous networking and security infrastructure solutions in a “real technologies being deployed in actual will best suit their needs. world” demonstration/evaluation environment before choosing a networking and security installations. Specifically, Anixter system for their specific needs. The facility also features enterprise says, the lab will dem- cabling and security solutions available onstrate networking and security prod- ucation and evaluation areas, the lab from the company’s key manufacturer ucts running over a single IP network, will build on “industry firsts” uncov- partners. the amount of bandwidth an IP camera ered by previous Anixter labs, includ- “The fact that we present solutions in or other device will take up on a partic- ing defining performance levels for UTP a vendor-neutral environment means ular network, and the impact that en- cabling, developing non-destructive that customers can make critical busi- vironmental effects will have on overall patch cord testing, and simulating ac- ness decisions based on real-world test- cabling performance. tual network applications over copper ing and unbiased analysis,” says Steve With separate demonstration, ed- and fiber cabling. Big Blue digging deep for Big Green data center purge R edirecting $1 billion per year across tiative targets IBM’s own eight million ters within the next three years without its businesses worldwide, IBM square feet of data centers in six conti- increasing power consumption or its car- (www.IBM.com) has unveiled a data nents, as well as clients around the world. bon footprint. center energy-reduction plan that could Through the project, IBM expects to dou- But rather than doubling the size of its achieve 42% energy savings for “Big Blue” ble the computing capacity of its data cen- data centers by building out new space, and its clients. IBM expects the initiative will For an average 25,000-square-foot help save more than five bil- data center, the company says, the proj- lion kilowatt hours of energy ect’s anticipated savings could equate to per year. as much as 7,439 tons of carbon emis- “Many data centers have now sions per year. reached full capacity, limiting a Dubbed “Project Big Green,” the ini- firm’s ability to grow and make necessary capital investments,” IBM’s Project Big Green initiative aims to explains Mike Daniels, senior achieve a 42% energy savings for a typical vice president of IBM Global 25,000-square-foot data center. Technology Services. “We are ➤ www.cable-install.com Cabling Installation & Maintenance ■ July 2007 ■ 49 C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 52. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F Flexible racks meet military media center specs T hirty-eight Stantron Broadcast Rack equipment racks from APWMayville (www.stantronracks.com) were recently installed at the Soldiers Media Center in Arlington, VA, which produces numer- ous news and public affairs programs for military personnel around the world. The Center distributes its information through the American Forces Network via IP and satellite, and to public access cable television. The flexible Stantron racks house vid- eo and audio routers, satellite receivers, Avid server components, patching, cam- era control and switching electronics, and a variety of recording, playback, and duplication equipment. Installed by Pro- Flexibility in the design of Stantron racks from APWMayville enabled a smooth installation at the fessional Products Inc. of Gaithersburg, Soldiers Media Center in Arlington, VA, where 36 customized units house everything from video MD, 26 of the racks were deployed in the routers and satellite receivers to camera control and switching electronics. main broadcast technical core, six in the IT portion of the technical core, three in accommodate servers and data routing id rear doors that are designed to create the studio control room (pictured), and equipment, was another bonus.” environmental security—moving cool air three in the video dub room. APWMayville delivered the racks with through the racks to maintain an ideal “The integration of a patchbay solid side panels for the end of each rack operating environment for the Media cabling system, as requested by Soldiers row, copper bus ground bars, and sol- Center’s active equipment. Media Center, places extreme impor- tance on cable management through- out the technical core,” explains Steve Wireless Gigabit Ethernet on-the-fly Losquadro, director of project manage- ment for Professional Products. “The 36- inch depth of the Stantron racks, along N ew technology in BridgeWave Communications’ (www.bridgewave.com) line of 100-Mbits/sec wireless links now let you upgrade in the field to Gigabit Eth- ernet simply by activating a web-enabled software key. with customized two-inch wooden fur- Both the FE80U and FE80XU point-to-point bridges, when at Gigabit Ethernet ring strips that were a special customer speeds, include the company’s proprietary AdaptRate technolo- request, afforded our integrations team gy that switches capacity from Gigabit Ethernet to 100 Mbits/ with the flexibility and room to properly sec transmission to provide continuous operation, even dur- run cables inside and between racks, ing intense downpours. and ensure that the equipment could be “It’s now possible to extend network capacity to full Gigabit properly cooled, maintained, and re-en- Ethernet bandwidth without time-consuming and expen- gineered after we left the site.” sive hardware upgrades,” says Gregg Levin, Bridge- The furring strips were secured into Wave’s senior vice president and chief marketing officer. BridgeWave’s FE80U and notches on the sides of the racks and, The bridge technology, Levin adds, “enables enterprise FE80XU point-to-point Losquadro says, “this provided the users to start out with highly economical 100-Mbits/sec bridges now incorporate two-inch gap between each rack in the capacity and then upgrade to full Gigabit Ethernet rates software-based technology technical core that helped us meet our as bandwidth needs grow.” that enables an upgrade integration challenges.” Designed as a “future-proof” alternative to traditional from 100-Mbits/sec Added Jim Hatcher, Professional Prod- 100-Mbits/sec, 18 to 38-GHz links, the point-to-point network capacity to full ucts CTO, “the ability to use these racks bridge technology can provide unlimited frequency re-use Gigabit Ethernet bandwidth in the IT portion of the technical core, in the 80-GHz licensed spectrum. as needs grow. which typically uses specialized racks to 50 ■ July 2007 ■ Cabling Installation & Maintenance www.cable-install.com C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 53. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F Data Center Management & Administration WEBCAST 7 200 11, RATION st Many legacy data centers can be held up as cases in point of JULY E REGIST m/webca how not to manage and administer structured cabling. Whether the environment is a data center’s LAN or its SAN, improper E FR .co install OW! administration can have adverse effects ranging from the leing w.cab N UP N inability to trace a circuit, to impeding airflow, to making moves/ ww adds/changes an unnecessarily long process. This webcast, SIG produced by Cabling Installation & Maintenance, provides a look at the industry standards, best practices, and technological developments that are helping data center managers improve the manner in which they administer their cabling plants. Presentation 1: Importance of proper cable management in the data center, from circuit tracing to airflow impedance, and copper/fiber choices related to management. Presentation 2: Technologies built for management – a technology- focused rather than brand-focused look at some of the products that have been developed specifically for cable management in the data center. Presentation 3: The TIA-606A addendum covering data centers – The 606A standard did not consider data centers, and the 942 standard did not consider administration. The two worlds are getting together in the form of an addendum to 606A. Date: July 11, 2007 Time: 1:00 p.m. EDT Moderated by: Patrick McLaughlin, Chief Editor, Cabling Installation & Maintenance Sponsored by: _________ Photo credit: BigStockPhoto.com C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 54. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F Big Green initiative that can reduce cabling costs; ing system. continued from page 49 • Virtualize IT infrastructures, such as “Relief from the energy crisis can’t be providing clients the IBM action plan to emerging hybrid systems that feature achieved through incremental improve- make their data centers fully utilized and special purpose processors designed ments,” says Bill Zeitler, senior vice pres- energy efficient.” to improve performance and reduce ident of IBM System and Technology Specifically, Project Big Green will in- energy consumption; Group. “Bold ideas and actionable plans volve a five-step approach to data center energy savings: “Relief from the energy crisis can’t be achieved • Evaluate existing facilities with en- ergy assessment, virtual 3-D power through incremental improvements.” management, and thermal analytics— including identifying and resolving • Seize control with power manage- are needed to deal with this issue.” existing/potential heat-related issues ment soft ware, such as provision- Project Big Green includes a new glob- that could create outages; ing soft ware that can reduce 80% of al “green team” of more than 850 energy- • Plan, build or update to an ener- power consumption on servers by efficiency architects from across IBM. gy-efficient data center, includ- putting them on standby mode when The company also plans to launch a ing a free online self-assessment of not needed; Web-enabled clearinghouse, the Ener- data center energy use, the op- • Exploit liquid cooling solutions gy Efficiency Incentive Finder, which tion of a pre-configured 500 or both inside and outside of the data will include details about incentives 1,000-square-foot data center with center, including IBM’s patented and programs that are available from energy-efficient technology, and “stored cooling” technology designed local utility companies, governments, a solution for improving air flow to significantly increase the efficiency and other participating agencies around under the data center raised floor of the data center’s end-to-end cool- the world. Short runs… DURHAM, NH—The University of New Hampshire Interoperability RICHARDSON, TX—A Web-based printing program for producing Lab (UNH IOL; (www.iol.unh.edu) recently conducted multi-vendor telecommunications system labels has been unveiled by 10GBase-T interoperability for Fulcrum Microsystems, Solarflare CommScope (www.commscope.com) that enables SYSTIMAX Communications, and Teranetics. Solarflare and Teranetics BusinessPartners to create professional product labels for demonstrated their independent 10GBase-T PHY implementation specific installations. The customized solution replaces the static using different systems at either end of the link. Tests were repeated templates available on the company’s website, and provides multiple times over a 55-meter, two-connector topology of Category two ways to create labels. The software supports labeling on a 6 cabling to show support for legacy installed cabling. A network number of SYSTIMAX products, including M2000/M3000 panels, throughput and latency benchmark showed that the link sustained PATCHMAX PS panels, LE and L faceplates, and VisiPatch/ a throughout of 10-Gbits/sec. The tests used two different switch VisiPatch 360 panels. designs from Fulcrum Microsystems (www.fulcrummicro.com). ______________ SACRAMENTO, CA—Low-power semiconductor transceiver Mike Zeile, vice president of marketing at Fulcrum, says, “These developer KeyEye Communications (www.keyeye.net) and copper two switch reference designs will provide OEM customers with transceiver manufacturer Methode Electronics (www.methode.com) quick-to-market [Ethernet] platforms that have the assurance of will jointly develop 10-Gigabit Ethernet copper MSA pluggable interoperability.” modules compatible with the short-reach, lower-power mode of SALT LAKE CITY, UT—Silex Technologies (www.silexamerica. the IEEE 802.3an 10GBase-T standard. The companies say the com) has unveiled Multicast Video Distribution System (MVDS), a __ modules will help data center managers significantly reduce cost wired/wireless video distribution system designed for the digital and power consumption resulting from a growing array of sign industry. MVDS’ digital multicast technology and an advanced 10-Gigabit servers and switches. compression algorithm lets it support large numbers of displays WATERTOWN, CT—Siemon’s (www.siemon.com) EMEA (Europe, at long distances with no image degradation. Designed for airport Middle East and Africa) manufacturing operations and logistics arrival/departure areas, trade shows, retail advertising, classrooms, center’s Quality Management System in Brno, Czech Republic, and emergency information displays, the MVDS technology can has been certified ISO9001:2000. The Brno facility will serve as connect using industry-standard Ethernet cabling and hardware, or Siemon’s pan-EMEA logistics hub, housing stock and acting as the via 802.11a wireless networking. Silex says its technology eliminates key distribution center for the company’s markets. In addition, the the need to use more expensive analog splitters and repeaters. facility houses IT cabling component manufacturing operations. 52 ■ July 2007 ■ Cabling Installation & Maintenance www.cable-install.com C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 55. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F Cat 6A solution undergoes 10-GbE traffic test E thernet Load Modules from perfor- livery and measure the performance of mance test systems developer Ixia these application-aware devices with tra- (www.ixia.com) were used at a demon- ditional test gear. To test these intelligent cabling system delivered to an end user.” Configurations were pre-configured, hot-staged, and pre-tested at the Ixia lab stration at Interop this spring to per- network devices effectively, real applica- in Calabasas, CA, and included two four- form “real” data plane traffic connector NetClear GTX chan- generation and analysis of the 15-meter, four-connector channel configuration nel configurations consisting of Berk-Tek (www.berktek.com) one 15-meter and one 100-meter and Ortronics/Legrand (www. ____ channel running live 10GBase-T _________ NetClear GTX ortronics.com) B traffic. NetClear GTX cabling A Augmented Category 6 UTP components consisted of the C channel solution. Analysis LANmark-10G Category 6A E D results showed frame rates cable from Berk-Tek and the Source: Berk-Tek/Ortronics and characterized data packets Clarity 10G patch panel, patch being sent. The NetClear/Ixia test included two four-con- cords, and TracJack workstation mod- “Today’s network components are in- nector NetClear GTX channel configurations ules from Ortronics/Legrand. creasingly aware of packet sequences that consisting of one 15-meter channel (shown) In addition to the Interop demonstra- now require cabling systems combined and one 100-meter channel running live tion, the Data Communications Com- with more sophisticated active equip- 10GBase-T traffic. petence Center for Nexans, located ment, higher up in the protocol stack, in Berk-Tek’s New Holland, PA facility, which is critical for efficiently qualifying tion traffic needs to be created.” is using two 10GBase-T load module 10GBase-T,” says Nelson Nurga, princi- The Interop demonstration, says Todd boards for ongoing further analytics of pal technologist with Ixia. “As a result, it Harpel, director of marketing for Berk- physical layer component capabilities has become increasingly difficult to test Tek, measured “the real-life impact of net- resulting from increased network speeds effectively for end-to-end network de- work degradation on the qualify of the and bandwidth. Short runs… OAKBROOK TERRACE, IL—A recent Web poll of more than 1,100 signals. According to Actiontec, the MegaPlug technology enables technology professionals, conducted by the Computing Technology throughput speeds that are more than twice that of previous Industry Association (CompTIA; __________ finds that www.comptia.org), generation HomePlug technology solutions, at least double that of security technologies and solutions will have the greatest impact on 802.11g wireless connectivity, and approaching Ethernet cabling organizations in 2007. A year ago, security ranked second in the levels. CompTIA poll. Wireless data applications finished second in this CORNING, NY—A $300 million facility expansion is planned for year’s poll, followed by convergence solutions such as VoIP. “The Corning Inc.’s (www.corning.com) Sullivan Park Research and __________ proliferation of devices that are now connected to networks, and the Development campus. “We have set some aggressive goals for increasing mobility of customers and workers, have pushed security accelerated innovation, including an anticipated doubling of new to top-of-mind for everyone, from the technician monitoring the business-generating technologies per decade,” says Joseph Miller, network to the business owners and operators whose livelihood can executive vice president and CTO, in announcing the expansion. be at risk in the event of a security catastrophe,” says John Venator, “Ensuring that we have modern, flexible laboratory space conducive CompTIA president and CEO. to the development of a healthy pipeline of innovative technologies SUNNYVALE, CA—A powerline networking technology, MegaPlug across diverse fields is critical to our success.” AV 200 Mbps Ethernet Adapter Kit, is based on the HomePlug AV BRICK, NJ—North American Video (www.navcctv.com) has been standard for distributing large entertainment and data files around awarded a $100,000 security installation contract from the Prince the home without the need of Ethernet cabling. Developer Actiontec George’s County Public Schools in Maryland. The agreement Electronics (www.actiontec.com) says the adapters can be used to includes design and implementation of a state-of-the-art video connect computers, set-top boxes and other devices for high-speed surveillance system for the state’s second largest school system multimedia file transfer over existing home electrical wiring. The and its 134,000 students. North American Video designs, installs, technology features two Ethernet adapters that can be used to build and offers training for security systems for applications ranging from a new home network or to extend an existing network to areas of banking to retail. the home that are difficult to reach via Ethernet cabling or wireless www.cable-install.com Cabling Installation & Maintenance ■ July 2007 ■ 53 C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 56. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F New Products Compiled by Steve Smith Indoor/outdoor fiber hubs capacity. The cabinet is built to accept The OmniReach Indoor Fiber Distribu- cables through openings located on the tion Hub FDH 3000i is designed to orga- top and bottom, while T-shaped cable nize and administer fiber-optic cables and guides and cable management spools passive optical splitters for such installa- align with each RMU, dividing and tions as multi-dwelling units. Providing ty against defects from manufacturing organizing cables as they enter and exit a cross-connect and interconnect inter- and workmanship, the LSZH cables can the rack-mount space. face for optical transmission signals at the be custom ordered to length and for spe- CHATSWORTH PRODUCTS cific installation requirements. www.chatsworth.com CABLES TO GO www.cablestogo.com Enterprise access point MAP-625 enterprise-class wireless ac- Passive cooling cabinet cess points provide a centrally managed N-Series TeraFrame network cabinets WLAN solution that enable migration are engineered to solve thermal prob- from legacy standards to 802.11n with- MDU, the 3000i features a front-facing lems, such as network switches with side- out upgrades, architectural changes, or cross-connect configuration designed for to-side airflow located in a hot aisle/cold additional peripheral equipment. Fea- fiber management and able to accommo- aisle layout that run the risk of re-con- turing dual radios, the MAP-625 is date a range of fiber counts as well as sup- suming hot exhaust air, causing elevated designed to provide 802.11n clients with porting factory-installed pigtails, fanouts equipment intake temperatures that lead and splitters. These cabinets can be wall- to failure. The company’s CPI Passive rack-, or floor-mounted. Cooling solutions technology manages Providing a connection between fiber- high-density switches while maximiz- optic cables and passive optical splitters in the outside plant, the OmniReach FDH 3000S fiber distribu- tion hub can be mounted to support more than four times the performance aerial, direct-buried, of typical WLANs while simultaneously and underground ap- supporting legacy 802.11a/b/g devices at plications. The hub their full speeds. connects feeder and COLUBRIS NETWORKS distribution cables via www.colubris.com optical splitters in FTTx networks, and is especially suited for rural and brownfield Compact OSP enclosure deployments. Designed for high-density telecommu- ADC nications equipment, such as 3G UMTS www.adc.com equipment and batteries, the 50B Com- pact Enclosure for outside plant mea- LSZH patch cables sures 15 inches wide by 25 inches tall and Duplex 62.5/125-µm and 50/125-µm multimode LSZH (low-smoke zero-hal- ogen) fiber-optic patch cables are now ing the data center’s energy efficiency. available in more than 60 standard con- Available in 10 heights and 11 depths, the figurations. These cables are designed for N-Series cabinets can manage 48 Catego- harsh environments, particularly where ry 6A UTP cables per RMU (rack-mount space is at a premium, such as high-end units), and are designed to simplify server rooms, aircraft , and ships/sub- installation and maintenance while pro- marines. Covered by a lifetime warran- viding maximum cable management 54 ■ July 2007 ■ Cabling Installation & Maintenance www.cable-install.com C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 57. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F New Products 33 inches deep, with 6U of 19-inch rack 23-gauge solid copper and a precision space. The enclosure can mount to pad, 100-Ω dielectric. Featuring a double- pole or wall, and features hinged, tam- jacket design, the cable’s inner jacket is per-proof doors that can lift off for easier designed to maintain critical spacing of mounting. Other features include gray or the twisted-pair elements, while the outer beige powder-coat paint finish, integrated TPE jacket offers additional strength, back-up battery module, and alarms to mover; HT-300 three-speed under-floor durability, diameter, and abrasion resis- detect high temperature and intrusion. air mover; HT-500 thermostatically Sealed for maximum protection, the controlled under-floor air mover; and 50B Compact Enclosure is designed for HT-700 thermostatically controlled over- GR-487, Zone 4 compliance. head air mover. COMMSCOPE DEGREE CONTROLS www.commscope.com www.fi xmydatacentercooling.com tance. The minimized pair skew (or delay) allows for red, green, and blue video com- Hot spot zapper Heavy-duty AV cable ponents to remain in sync for optimal HotSpotr, billed as an easy-to-install Designed for transmission of component picture quality and video distribution. system for cooling data center hot spots, analog video in a twisted-pair format GEPCO INTERNATIONAL supplies cool air to hot racks and then ex- without hardware delay compensation, www.gepco.com hausts the hot air directly to the CRAC the LSK04HD heavy-duty, ultra-low skew (computer room air conditioner). Each UTP cable provides a consistent pair lay Two-in-one blower unit is designed to eliminate hot spots with a maximum time-delay differential The Fibreflow Fusion blower can blow in up to three racks. Models include: of 2 ns (per 100 m) between any two pairs. fiber counts of 1 to 96 (typically requires HT-100 always-on under-f loor air Each pair in the cable is constructed from two machines to cover this range). It ➤ If Higher Ed Is Your Market, ACUTA Has Events for You! Reach decision makers responsible for voice, data and video services on campuses from coast to coast at ACUTA events. July 29–Aug. 2, 2007 October 14–17, 2007 January 27–30, 2008 April 6–9, 2008 36th Annual Conference Fall Seminars Winter Seminars Spring Seminars & Exhibition Minneapolis, MN Anaheim, CA St. Louis, MO Hollywood, FL Contact ACUTA to Connect with Higher Ed! Amy Burton, Mgr. Corporate Relations/Marketing 859/278-3338 www.acuta.org/ex-spon www.cable-install.com Cabling Installation & Maintenance ■ July 2007 ■ 55 C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 58. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F Product Focus: fiber-optic polishing equipment Portable polisher for field termination Long-life polishing fixture, film The Rev system for processing fiber- dards. According to the company, Built for long life and designed for use with ST, optic connectors features a patented newly terminated connectors can be SC, and FC connectors with 2.5-mm ferrules, connector holding mechanism that polished to singlemode geometries the Model 45-342 polishing fixture features a is optically aligned and calibrated in less than two minutes. Damaged precision-manufactured center hole diameter connectors on cabling, patch cords, to assure the ferrule is kept perpendicular to OTDR launch boxes, and test equip- the polishing surface. In addition, a grooved ment interfaces can be recovered face is designed to enhance polishing effi - and retro-polished to their original ciency and optimal connector specifications. Lightweight and por- performance. The compa- table, powered by either a 9-volt bat- ny has also introduced tery or AC adapter, the Rev is built a line of aluminum ox- for inclusion in field termination kits. ide polishing films for Interchangeable workholder fixtures ceramic, stainless support all industry-standard UPS/ steel, plastic and APC connectors, MIL-SPEC termini, composite ferrules. and custom components. As an A single sheet typically alternative to mechanical cleaving yields a range of 10 to 20 devices, Rev can also polish bare connectors when used in the recommended fibers to superior flatness and sur- three-step process of 0.5-µm, 3-µm, and face finish in preparation for fusion- 12-µm films. Films are available in quantities splicing activities. of 20 per sleeve in 3 x 6-inch sizes. to achieve maximum performance KRELL TECHNOLOGIES IDEAL INDUSTRIES and compliance with Telcordia stan- www.krelltech.com www.idealindustries.com is fitted with a radial force-setting Gell-free loose tube device, a blocking device, and an elec- The NanoCore line of gell-free, loose tube tronic speed and distance counter. In- optical-fiber cables includes a 12 to 24 fiber-optic strand zip cord, a single-jacket construction built to accommodate from 2 to 12 strands, and a dual-jacket con- struction that can ac- commodate up to 72 strands. (Where more than 12 strands are properties, is a key element of the com- present, they are sep- cluded with the blower are control and pany’s new fiber-optic cleaning kit. Also arated by a colored air treatment, set of air hoses, tools, included are a cleaning card and cleaning binder into 12-strand lubricating oil, and spare parts. cube, both of which are designed to pro- bundles.) Designed to EMTELLE US vide cleaning and wiping surfaces that work with MT, MTP/ www.emtelle.com are safe to fiber end faces. In addition, the MPO, and other small-form-function kit includes two sizes of swabs for clean- connectors, NanoCore cables offer high- Fiber cleaner ing inside fiber ports. er fiber strand counts in smaller diameter A fiber-optic solvent, which uses a plastic- FLUKE NETWORKS cables, and can be installed in most ple- safe solver designed for superior cleaning www.flukenetworks.com num environments. Available construc- 56 ■ July 2007 ■ Cabling Installation & Maintenance www.cable-install.com C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 59. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F New Products tions include 8.3-µm singlemode and imal depth in front of the panel. The 62.5/50-µm multimode, including fiber recess depth (3-inches from installation for 10-Gigabit Ethernet applications. point) provides room for proper patch HITACHI CABLE MANCHESTER cord bend radius. Built for standard www.hcm.hitachi.com 19-inch racks and cabinets, the recessed L-Plug with snagless boot is available for panels are offered in the company’s Uni- Fiber-optic fueled camera RJ-45 Category 5e, and soon to be avail- versal and QuickPort styles, in 1RU Built-in 10-bit digital fiber-optic trans- able for Category 6. It has a cable rating 2-port, 2RU 48-port, and 2RU 72-port ceivers are now available with the Super- of up to 350 MHz, and features gold con- configurations. Dome series of indoor/outdoor analog tacts with UL 94V-0. LEVITON VOICE & DATA PTZ dome cameras. The fiber interface WESTEK ELECTRONICS www.levitonvoicedata.com is designed to provide exceptional light- www.westek.com ening immunity for outdoor security Power over Ethernet midspan A one-port, gigabit Power over Eth- Recessed patch panels ernet (PoE) midspan (PD-7001G) These recessed patch panels provide is built to main- expanded options for applications where tain existing PoE the back rail is positioned close to the standard param- rear doors, or in applications with min- eters with dou- ble the power, supporting a min- imum of 30 watts installations, and exceptional resistance at the port output. This unit is suitable to electrical interference for industrial/ for such applications as security cam- harsh environment interior installations. era installations, gigabit video phones, The V1700M multimode version offers a WiMAX transmitters, or 802.11n transmission distance of up to 2.7 miles, access points. The PD-7001G is designed while the V1700S singlemode version to generate safe power over Category 5 offers a transmission distance of up to cabling, providing maximum power by 18.6 miles. (Singlemode versions sup- using a 55-volt output. The unit includes ➤ porting longer distances are available.) These cameras offer 480 TVL, high-res- olution, DSP imaging in color, with 18x and 22x, day/night operation with 23x, bulletin boards and image stabilized 26x and 35x optical zoom. The fiber-optic transceiver sup- ports switch-selectable interfaces, such 10Gig Testing as Manchester/Biphase, RS-422, and White Paper RS-485 (two- and four-wire). INFINOVA Learn about the testing challenges for 10Gig www.infinova.com Ethernet over copper cabling and see how new installation and testing Snag-free plug guidelines help combat The patented Snagless L-plug has been Alien Crosstalk. engineered to protect the modular jack Download our white paper today at lever from snagging surrounding cables www.flukenetworks.com/10Gig or equipment, rendering the connector unbreakable. It is designed to stay tightly and securely in port and, according to the company, is as easy to lock and un- _________ NETWORKSUPERVISION ©2006. Fluke Corporation. lock as a traditional L-plug. Snagless www.cable-install.com Cabling Installation & Maintenance ■ July 2007 ■ 57 C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 60. C Previous PageContents Zoom In A 7 Installation Maintenance Zoom Out Front Cover Search Issue B Next Page EMaGS F New Products an interlocking feature that lets you scale feet when used with a passive balun Curved patch panels deployments by linking multiple one- at the receiver (up to 6,000 feet when used Clarity curved patch panels for the com- port midspan units as new devices are with an active balun). It consumes less pany’s Clarity 6 and 5E connectivity tech- added to the network, and an internal than 0.7 watts, deriving power from the nology feature a patent-pending recessed AC/DC converter. CCTV camera. design that helps direct patch cords to MICROSEMI CORP. MUXLAB vertical rack or cabinet management, and www.microsemi.com www.muxlab.com CCTV balun IP video software The Active CCTV Transmitter Balun pro- XProtect Corporate IP video soft ware is vides enhanced video performance for a designed for large, multi-site and mul- single CCTV video channel via Category 5 tiple server installations requiring 24/7 UTP cable. When installed inside a dome surveillance. The distributed server serves as an alternative for installations architecture allows unlimited recording with limited rack space for horizontal and arching of video, while client access management. Available in 24-port (1U) provides live view, playback, and video and 48-port (2U) configurations, these evidence export with smart search and ETL-tested patch panels are verified to analysis. The soft ware supports a wide TIA Category 6 and 5e component spec- range of network cameras and encoders, ifications, include rear cable management while the open platform includes appli- and full labeling capabilities, and fea- cation program interfaces (API) for inte- ture universal 568-A/B wiring as well as camera or camera back box, the balun gration with third-party systems. 110 termination practices. features manual gain compensation to MILESTONE SYSTEMS ORTRONICS/LEGRAND support distances from 500 to 3,000 www.milestonesys.com www.ortronics.com • UPC/APC/MIL Rev ™ Extend T1/E1 over: Connectors Micro Polisher • Telcordia Compliant • Ideal for Field Kits, Ethernet hot products Cable Repair IP/Ethernet • AC/Battery Operation Fiber Miles of Fiber Wire Up to Several Miles of 2-pair Wire www.textender.com 800-432-2638 krell technologies Data Comm for Business, Inc. www.krelltech.com ■ 732-617-7091 58 ■ July 2007 ■ Cabling Installation & Maintenance www.cable-install.com C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 61. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F hot products Now you have a cost effective new compression tool for use with a wide variety of connectors including most 59, 6, 7 and 11 “F” connectors and many RCA and IEC connectors. Compact and sturdy, the CT2 has spring-loaded handles with a push button lock and is designed for easy use in tight spaces. No special adjustments, no adapters… just reliable performance day after day. For more info visit www.ripley-tools.com or call 860-635-2200 today. Visit Booth #1435 at the SCTE Cable-Tec Expo _____________ 46 Nooks Hill Road, Cromwell, CT 06416 USA the Industry’s Centralized Management Channel PowerDsine Cost Effective Solutions Fully IEEE 802.3af Standard Compliant 3006 POE Easy plug-and-play installation Automatic detection and protection Connecting of non-standard Ethernet terminals Saves time and reduces installation the organizations costs that develop Part#: 33-POE-PD3006 Powers all major wireless LAN access points and IP phones cabling technology Scalable solution 6/12-port product and those that Z Dualband Antenna Material: UL 94-V0 PC/ABS Size: 1.75” high Cable: 16” Plenum use it. Rated RG-58/U PL Connector Options: RPTNC(Male) or RPSMA(Male) Mounting Method: Through hole 15/16 dia (0.94) 78-14 UNF Plastic Hex Nut Part#: 34-ZDUAL-KIT-RPTNCM Gain: 2.4GHz—4dBi (802.11b/g) Part#: 34-ZDUAL-KIT-RPSMAM Gain: 4.9-5.8GHz—4dBi ((802.11a) www.cable-install.com Visit www.oberonwireless.com Call 1-877-867-2312 for details. www.cable-install.com Cabling Installation & Maintenance ■ July 2007 ■ 59 C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 62. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F INDEX OF ADVERTISERS COMPANY PAGE PHONE WEB Acuta 55 859-278-3338 www.acuta.org/home.cfm Chief Editor / Patrick McLaughlin Senior Vice President/Group Publishing Director (603) 891-9222 • patrick@pennwell.com ADC insert www.adc.com Mark Finkelstein Tel: (603) 891-9133; fax: (603) 891-9297 Executive Editor / Steve Smith Agilent Technologies 5 800-829-4444 www.agilent.com/find/wirescope mark@pennwell.com (603) 891-9139 • stevesm@pennwell.com ext 5465 Associate Publisher/National Sales Manager Senior Editor / Matt Vincent Belden/CDT C3 800-BELDEN-1 www.belden.com Ed Murphy (603) 891-9262 • mattv@pennwell.com PennWell Corp./ATD CableManagement Solutions Inc. 4 800-308-6788 www.snaketray.com 98 Spit Brook Road Circulation Manager / Michelle Blake Nashua, NH 03062-5737 (603) 891-9360 • michellb@pennwell.com Cables To Go 26 800-361-0471 www.quiktron.com Tel: (603) 891-9260; fax: (603) 891-9245 edm@pennwell.com Mylchreest Art Director / Kelli Cablofil Inc. 39 www.cablofil.com Online Sales Manager Hipp Lead Illustrator / Chris Corning Cable Systems C2 800-743-2671 www.corning.com/cablesystems Shaun Shen Tel: (916) 419-1481 Senior Vice President/Group Publishing Director Daimler Chrysler Vans 12-13 800-4ADODGE www.dodge.com/sprinter sshen@pennwell.com Mark Finkelstein (603) 891-9133 • mark@pennwell.com Datacom for Business 58 800-432-2638 www.textender.com Reprint Sales Diane Troyer Associate Publisher/National Sales Manager Diamond Ground Products 59 805-493-3837 www.diamondground.com Tel: Murphy Ed (603) 891-9385; fax: (603) 891-9245 dianet@pennwell.com (603) 891-9260 • edm@pennwell.com Dymo Corporation 27 www.rhinolabeling.com List Rental / Bob Dromgoole Fluke Inc. 1 www.flukenetworks.com/seehow (603) 891-9128 • bobd@pennwell.com CABLING INSTALLATION & MAINTENANCE EXECUTIVE AND EDITORIAL OFFICES Fluke Inc. 48 www.flukenetworks.com/ INTERNATIONAL SALES PennWell ATD SeeMicroSCanner2 Australia/New Zealand / Glenn Clarke 98 Spit Brook Road Fax: +61 NH 03062-5737 Nashua, 3 9 568 4955 Fluke Inc. 57 www.flukenetworks.com/10Gig glennclarke@build.com.au Tel: (603) 891-0123, fax: (603) 891-9245 Internet: www.cable-install.com General Cable Company 31 800-424-5666 www.generalcable.com France, the Netherlands, Belgium, Andora, Greece, Spain, Portugal, Western Switzerland / Luis Matutano Hellermann Tyton 36 800-822-4352 www.hellerman.tyton.com Tel: +33 1 39 66 16INQUIRIES: 1 39 23 84 18 SUBSCRIPTION 87; fax: +33 luism@pennwell.com change your format to print or digital, For subscriptions or to Hyperline Systems Canada 35 866-63-hyper www.hyperlinesystems.com please go to: www.cim-subscribe.com. Subscriptions outside Austria, Eastern Europe, the USA are available in digital format only. Germany, Northern Switzerland / Holger Gerisch Krell Technologies 58 732-617-7091 www.krelltech.com Tel: +49 8801-302430; fax: +49 8801 913220 holgerg@pennwell.com Leviton Telcom 41 800-922-6229 www.levitonvoicedata.com India / Rajan Sharma Live Wire & Cable 57 888-897-6008 www.live w-c.com Tel: +91 11 686 1113; fax: +91 11 686 1112 rajan@interadsindia.com Micro Plastics 20 www.microplastics.com CORPORATE OFFICERS Israel / Dan Aronovic Tel: +972 9 899 5813 Lauinger Chairman / Frank T. Mohawk 14 800-422-9961 www.mohawk-cable.com aronovic@actcom.co.il President and Chief Executive Officer / Robert F. Biolchini Oberon Inc. 59 814-867-2312 www.oberonwireless.com Italy / Vittorio Rossi Prudente Tel: +39 0 49 87 Officer fax: +39 0Wilmoth 98 Chief Financial 87 584; / Mark C. 49 66 04 OFS Optics (Optical Fiber Division) 11 www.ofsoptics.com/fiber prudente@aviationweek.com ADVANCED TECHNOLOGY DIVISION Russia / Anton Antoniuk Optical Cable Corp. 2 540-265-0690 www.occifiber.com Tel: +7 095 234 5678; fax: +7 095 234 5665 Senior Executive Assistant Ortronics Inc. 24 800-934-5432 www.ortronics.com anton@ccc.ru Carol Woodward U.K.(603) 891-9112, fax: (603) 891-9287 Tel: & Scandinavia / Amanda Loftus Paladin Tools 38 800-272-8665 www.paladin-tools.com carolw@pennwell.com Tel: +44 0 1793 862111; fax: +44 0 1793 862110 amandal@pennwell.com Panduit Corp. 10 800-777-3300 www.panduit.com/p922 VP Audience Development / Gloria S. Adams Asia Sales Manager / Adonis Mak Panduit Corp. C4 800-777-3300 www.panduit.com/net23 Tel: +852 2 838 6298; fax: +852 2 838 2766 ATD PUBLISHING SERVICES DEPARTMENTS adonism@actintl.com.hk Pulizzi Engineering Inc. 21 977-pulizzi www.pulizzi.com Art Director / Meg Fuschetti Japan / Manami Konishi Tel: +81 3 5771 8886; fax: +81 3 5771 8887 Ripley Tools 59 860-635-2200 www.ripley-tools.com manami.konishi@ex-press.jp Rodriguez Production Director / Mari (603) 891-9193 • marir@pennwell.com Siemon Company 33 www.siemon.com Korea / Paek Kwon Tel: +82 2 420 1293 or 1213; Manager2/ 420 1294 Marketing Communication fax: +82 Kristen Jones Test-Um/JDSU 7, 45 805-383-1500 www.test-um.com pkwon@kescor.co.kr (603) 891-9425 • kristenj@pennwell.com Singapore,Manager / Indonesia, Thailand Ad Traffic Malaysia, Lacy Ward Transition Networks 17 800-526-9267 www.transition.com Grace 832-9268 • lward@pennwell.com (918) Leung Tel: +65 6 836 2272; fax: +65 6 735 9653 Tyco Electronics 28 www.tycoelectronics.com gleung@publicitas.com Tyco Electronics Corp. 19 800-553-0938 www.ampnetconnecy.com Taiwan / Anita Chen Tel: +886 IN8751 USA fax: +886 2 8751 8861 NO. 126813153 PRINTED 2 THE 5162; GST Uniprise 8 up.commscope.com/designguide anita_chen@globalitmedia.com Publications Mail Agreement Number 40052420 The index of Advertiser’s is published as a service. The publisher does not assume any liability for errors or omissions. 60 ■ July 2007 ■ Cabling Installation & Maintenance www.cable-install.com C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue Next Page EMaGS B F
- 63. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F Get Peace of Mind with Belden Fiber Solutions ® The Fast, Easy, Belden has been involved in the develop- Belden developed the FiberExpress Affordable ment of optical fiber components since Solution to assure the smooth operation and Reliable 1972—evolving to its present status as an of your network and to provide for Way to Fiber international supplier of high quality, cost- efficient network management—while effective optical fiber cabling systems. continually reducing your total cost of ownership and preparing your The Belden FiberExpress® Solution is the system for the future. culmination of the company’s experience in the optical fiber arena, offering users For more information a complete, high-performance, end-to- on fiber solutions from end cabling system that supports both Belden call 1.800.BELDEN.1 centralized and fiber-to-the-desk (FTTD) topologies, as well as in-building or www.belden.com campus backbone cabling configurations. The Belden FiberExpress Solution is, however, much more than an assemblage of top-performing products. It represents a whole new approach to the methodology of optical fiber cabling, i.e., FiberExpress systems are unique in their ability to offer both superior performance and a more cost effective, faster and less complex installation process than traditional optical fiber cabling systems. © 2007, Belden Inc. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F
- 64. C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F PANDUIT ® QUICKNET ™ Cabling Systems deliver optimum performance and speed of deployment for scalable, high-density applications. QUICKNET ™ Cable Assemblies and Modular Cassettes are pre-terminated and pre-tested to deliver consistent, reliable performance resulting in significantly less installation time than traditional field terminations. These end-to-end cabling systems improve flexibility, minimize waste and optimize cable management in up to 48 ports per rack space. QUICKNET ™ Copper Cabling System: ■ Pre-terminated cable assemblies are customized for PANDUIT is a Global Leader Category 6 and Category 6A performance levels, cable Providing Innovative End-To-End flame rating, end configurations and lengths from 10 to 295 feet Network Connectivity Solutions ■ Modular patch panels include a high-density angled version that that Enable the Deployment quadruples rack density when used with vertical cable managers of Technology. QUICKNET ™ Fiber Optic Cabling System: ■ Copper Cabling Systems ■ Pre-terminated cassettes for singlemode, multimode, and ■ Fiber Cabling Systems 10 Gb/s systems deliver verified low loss, allowing for greater network design flexibility and longer reach network segments ■ Outlets ■ Application specific trunk, interconnect, and hydra cable ■ Raceway Systems assemblies are 100% tested to assure verified optical ■ Zone Cabling Systems performance for improved network integrity ■ Network Management and PANDUIT provides the leadership, innovation, and quality necessary PoE Systems to ensure the performance, reliability, and interoperability of an ■ Fiber Routing Systems integrated network. Invest in a trouble-free, high performance ■ Racks and Cable Management infrastructure for the lowest total cost of ownership. ■ Network Grounding Systems ■ Network Identification Systems ■ Network Cable Ties and Accessories PANDUIT is a Solutions Enabler Partner for IP Communications within the Cisco Technology Developer Program. Visit us at www.panduit.com/net23 Contact Customer Service by email: cs@panduit.com or by phone: 800-777-3300 and reference ad # net23 C Previous Page A Installation 7Maintenance Contents Zoom In Zoom Out Front Cover Search Issue B Next Page EMaGS F