Best Network Practices for DSL Deployment


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A business case whitepaper presenting the Phylogy value proposition for wireline carriers wanting to optimize DSL services and expand new DSL service areas while reducing their CAPEX compared to traditional DSL deployment option

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Best Network Practices for DSL Deployment

  1. 1. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSL A Solution Whitepaper The TripleStream® Line Conditioner accelerates attainment of ARPU & ROI goals of those wireline carriers caught between the exorbitant cost of FTTH and the frustration of inadequate VDSL2 performance. Many carriers are concerned that cost-effective service delivery options for IPTV are simply not available today. Phylogy offers an important alternative, proven capable of bridging premium services to subscribers beyond the reach of todays VDSL2 deployments while avoiding the high cost of fiber. When TripleStream® is deployed as a standard-practice network engineering method for conditioning the access loop, it can triple aggregate bandwidth capacity across xDSL distribution areas at one-third less cost than present methods of operation (ref pg. 35). Phylogy Corporate Offices 2350 Mission College Boulevard Suite 400 Santa Clara, CA 95054 866-PHYLOGY (866-749-5649) email: physales@phylogy.comTripleStream Line Conditioner September 2009 Page 1 of 36
  2. 2. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLTable of Contents_____________________________________________________________Executive Summary pg 3I. The Challenge pg 4II. The Solution pg 5III. Technology Brief pg 6IV. How TLC Line Conditioning Works pg 8V. Service Applications Across the Network pg 11 Leveraging Remote Terminal Assets to Extend Service Revenues pg 12 Extending Revenue Services from the Central Office pg 13 Deploying New RT-Fed Subscriber Service Areas pg 14VI. Installing TLC Nodes into the Network Flexible Speed-Splice Options pg 16 Deploying TLCs Into Existing Aerial Splice Cases pg 17 Access to Buried Plants Using Standard-Practice Procedures pg 18 Upgrading Existing Splice Pedestals pg 19 Co-Locating with Existing Cross-Connect Cabinets pg 19 Adding New TLC Cabinets to the Network pg 20 Design Rules for Placing TLC Nodes in the Loop pg 21 Utilizing Existing Network Splice Points for Optimal TLC Placement pg 21VII. TripleStream® Line Conditioner Products Line Cards pg 22 Line Card Testing pg 23 Enclosures pg 24VIII. Planning Options for Maximizing xDSL Network Performance Capacity, Transport Efficiency, and Equipment Utilization pg 25 Scaling Extended Reach into Expanded Distribution Area pg 27 Comparing Aggregate Bandwidth Augmentation Across a DA pg 28 Key Advantages for the Carrier pg 30IX. TLC Network Management Strategy pg 31X. An itemized cost-comparison business case pg 32XI. About Phylogy pg 35XII. Acronym Reference pg 36TripleStream Line Conditioner September 2009 Page 2 of 36
  3. 3. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLExecutive SummaryTelcos, equipment suppliers, and chipmakers originally expected VDSL2 distribution areas to reach4.5 to 5 kft for 25 Mbps IPTV services. But the telco industry has discovered over the past couple ofyears that variables in the access network have made that goal unrealistic, and HDTV-quality reachhas been dialed back 30% within the last 18 months based on real-world experience in the accessplant. This reach rollback has then driven IPTV deployment costs higher and has left “customerswilling to pay” either under-served or un-served.While the majority of US IPTV service is currently deployed via ADSL2+ to serve SDTV out to 8 kft,many telcos also deployed DSLAM RTs using VDSL2 to serve HDTV IPTV based on a 4-½kft designrule. Having now dialed back that design rule to a field-proven realistic 3 to 3.5 kft, these RTs areshelved with excess VDSL2 ports that cannot reach their anticipated service range.This excess VDSL2 Performance ShortfallDSLAM capacity,now underutilized,represents astrandedinvestment that cannever realize theoriginal ROI goalswithout a change instrategy.The other fallbacksolution to theVDLS2 shortfall –pair bonding – hasalso uniformlyproven to be a non-performeraccording to majorUS carriers, citing a shortage of spare pairs in the network hindering mass deployment. In addition,the added crosstalk can cause the aggregate demultiplexed bandwidth from a bonded pair to be lessthan 70% of the anticipated.Alternatively, carriers who eschewed VDSL2 for ADSL2+ are limited to Standard Definition-only IPTVofferings, leaving them vulnerable to cable and satellite competition, and short of their revenue goalsfor HDTV subscribers. HD has now penetrated over 40% of American homes, and the prospect of anxDSL access network limited to SDTV will never deliver the revenues and ROI that are mandatory for21st Century telco business models.Carriers are now faced with having to further deploy un-planned additional RT investments to make upfor this shortfall in VDSL2 performance. They must match cable competition, meet the demand forHDTV, and to achieve their revenue targets for ARPU (Average Revenue Per User) approaching $100for bundled triple play services.Phylogy is solving this challenge with a rapidly-deployed, affordable, and comprehensive networkingimprovement solution that directly improves the carriers’ ability to more profitably compete for premiumservice subscribers.TripleStream Line Conditioner September 2009 Page 3 of 36
  4. 4. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLI. The Challenge● Millions of telco subscribers have low DSL performance or are out-of-range;● Existing DSL service limitations can not effectively compete against cable;● Telco’s are missing their ARPU goals for premium services including IPTVThe number of unserved & underserved DSL subscribers are higher than expected usingpresent DSL methods, capping the ability to economically expand revenues and making thepenetration of new market share more costly than anticipated. Expanding service to theseunreached areas is taking too long, often not being able to deliver the HDTV qualitysubscribers are demanding, and leaving telcos unprepared to compete aggressively againstcable.Finally the expansion of DSL service using present methods of operation (PMO) is toocomplicated. This unnecessary complexity in network engineering and installation increasesthe cost of xDSL extension up to 30% higher than required using line conditioning, thuslimiting the revenue, ROI, and market share goals of telcos worldwide.The presence of strong premium-market demand (e.g., IPTV subscribers willing to pay forquality HDTV service) is well documented. But telcos are lagging in their ability to grasp thismarket because they are needlessly struggling with sub-optimal xDSL network performance. IPTV’s share of the overall pay-TV subscriber base will grow from 3% in 2008 to 14% in 2013 at the expense of cable TV’s share, which will decline from 76% to 61% over the same period, according to a new forecast by Pyramid Research ( “IPTV operators continue to make strong strides in gaining pay-TV market share,” comments Özgür Aytar, Senior Research Manager, Broadband & Media. “Pyramid Research estimatesthat IPTV will drive a global total of 9m net subscriber additions in 2008, 40% of which will come from Asia-Pacific region.” IPTV subscriptions to grow 64 percent in 2008: Gartner September 25, 2008 LONDON (Reuters) - Worldwide subscriptions to Internet-based television platforms are on track to reach 19.6 million subscribers in 2008, a 64 percent increase, according to analysts at Gartner. Revenue from worldwide Internet protocol television is forecast to reach $4.5 billion, up 93.5 percent from a year earlier, with Western Europe boasting the largest number of IPTV subscribers and North America the largest market for IPTV revenue. It forecast that 1.1 percent of households worldwide would be using IPTV in 2008, and expects that to rise to 2.8 percent by 2012.25% of U.S. Households Have at Least One HDTV Set: Survey April 24, 2008Los Angeles - A new survey of U.S. consumers found that 25% of U.S. households, or 28 million, now have at least oneHDTV set, and that 5.5 million households purchased an HDTV set for the first time during the 2007/2008 holiday andSuper Bowl season. Conducted by Frank N. Magid Associates, the survey additionally found that some 3 million homesadded a second HDTV set during this same time frame, making for a total of nearly 10 million multiple HDTV set homes.TripleStream Line Conditioner September 2009 Page 4 of 36
  5. 5. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLII. The SolutionPhylogy is delivering a proven technology that maximizes the rate and reach of DSLAMs andmodems. This paper demonstrates how TripleStream Line Conditioning (TLC) is:● A more economical, efficient, and faster technology option than adding costly new RT / DSLAMs for extending reach and bandwidth;● A seamless access loop technology that is fully compliant with existing telco operations and all DSL standards; and● A fully planned deployment solution delivering rapid installation that makes TLC the fastest time- to-market asset with fastest time to payback of any xDSL expansion option.Conditioning the LoopWhen TripleStream® is deployed as part of standardized network design & engineeringpractice, it can triple aggregate bandwidth capacity across xDSL distribution areas at one-third less cost than present methods of operation ($353 vs. $533 per subscriber line – seesection X). Thus we are suggesting that TLC offers the wireline carrier an optimal designpractice for engineering maximum ROI from all existing and planned xDSL network assets. OPTMAL DESIGN PRACTICE for ENGINEERING xDSL NETWORKS PRESENT xDSL TripleStr eam EXPANSION METHODS (PMO) “BEST PRACTICE” SLOW DEPLOYMENT ACCELERATE DEPLOYMENT 800% TO DELIVER12 to 18-month delay to plan and deploy RT DSLAMs FASTEST TIME-TO-PAYBACK versus six weeks for Line Conditioners HIGH COST New RT / DSLAMs require power, new fiber back- REDUCE DEPLOYMENT COSTS 34% hauls, civil engineering, pedestals and new copper legs for re-homing LOW BANDWIDTH INCREASE AVAILABLE BANDWIDTH Even new DSLAMs are not capable of delivering IN THE ACCESS LOOP UP TO 300% maximum DSL bandwidth across CSA LOW ASSET UTILIZATION FULLY LEVERAGE ALL EXISTING DSL ASSETSRT DSLAMs not fully loaded due to reach limitations TO MAXIMIZE BANDWIDTH CAPACITY & ROI - DSL Network is Under-UtilizedTripleStream Line Conditioner September 2009 Page 5 of 36
  6. 6. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLTripleStream® Line Conditioning (TLC) is a non-disruptive, fully-compatible xDSL technologyproven effective at leveraging the performance of all of todays xDSL chipsets and networks.Line Conditioning bridges the gaps in xDSL performance to help the wireline carrier meettheir core business goals:● Fully realize VDSL2’s promised performance to approach original design rules;● Improve the efficiency and utilization of existing DSLAMs housed in RTs;● Enhance legacy ADSL installations to approach the performance of ADSL2+;● Leverage CO-fed xDSL plants to serve 35% deeper into the CSA and help minimize the need for costly RT installations; andApplying this ubiquitous line conditioning method across the entire xDSL service spectrumshows that provides a substantial revenue impact, resulting in improved service availabilityfor all four revenue classes:● Data-Only (256Kb – 1.5Mb)● Hi-Speed Data + VoIP (3 – 7Mb)● IPTV for Standard Def (8 – 15Mb)● IPTV for Hi-Def (16 – 30 Mbps)TripleStream Line Conditioner September 2009 Page 6 of 36
  7. 7. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLIII. Technology Brief on the TripleStream ® Line Conditioner (TLC ® ) Phylogy’s ability to improve xDSL reach and bandwidth is achieved using a simple line-insertion device which auto-calibrates, requiring no field or EMS setup. TLCs are installed using a familiar speed-splice process fully described in section VI. All TLC configurations are line-powered via the POTS 48 volts requiring no external powersupplies. As a ruggedized, field-proven solution, all Phylogy products offer water-proofed,fully-weatherized enclosures requiring no active cooling.● The TripleStream Line Conditioner is a 4.5” by 7.5” dual-port circuit board using analog components and a patented process;● The circuit grooms the DSL carrier signal to reduce noise, and conditionally amplify it;● TLC operates in synchronization with the xDSL chipsets in the DSLAM and modem to learn the exact loop make-up on a line-by-line basis and then auto-calibrates itself to match each line’s characteristics to provide optimal enhancement on a line-by-line basis;● TLC is transparant to layer 2 and layer 3 techniques, making it compatible with future xDSL coding and compression methods● TLC only uses 250 mW per line (1/4 watt)As a true plug-&-play technology, the TripleStream® solution is simple and fast to install:● TLC is spliced into a service pair approximately mid-loop between the DSLAM and farthest CPE. For our multi-line enclosure solutions, optimal performance is achieved by identifying convenient access points to feeder cables which are midway between the DSLAM and the subscribers’ CPE. Documentation and placement calculators are provided to aid optimal deployment.● Cabinets for high-volume deployment include cable splicing junction bays and integral cross- connect blocks● Installation is accomplished with standard craft practices. No additional skills, tools, or training are needed.● TLC automatically tunes its internal circuitry to compensate for plant quality, cable gauge, and cable length● The voice signal is passed through untreated, maintaining lifeline service even during power outageTripleStream Line Conditioner September 2009 Page 7 of 36
  8. 8. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLIV. “Conditioning the Loop” How TLC Line Conditioning WorksOptmizing the Power / Spectral Density (PSD) EnvelopeOperating in concert with all xDSL chipsets used in DSLAMsand modems, TLCs effectively shape the power / spectraldensity envelope to increase bandwidth rates across a longer-reach of the copper medium. Envelope shaping uses adynamically tuned circuit and low-power amplificationconsuming at most only a quarter watt.Better than Brute-Force Amplification of the DSL CarrierDistinctly superior to all other line conditioning approaches which use a brute-force signalamplification method, the Phylogy approach significantly improves SNR. Other methodsactually increase signal noise as they increase signal power, adding more crosstalk withinbinder groups and thus degrading SNR. Because Phylogy avoids power-hungryamplification, our line conditioning circuits draws only a 1/4 watt compared to the 6wattsconsumed by competing options. This minimal power draw then provides several keyadvantages:► The TLC circuit operates using only the 48v POTS life-line power► No external power supplies are required► No added CAPEX to provide external 120V power► No significant heat generation means no added cooling requirements are needed► The lack of external power and active cooling, plus our dual-port configuration, enables high-density cabinet deployment.Improving Bit-Loading Across the PSD Mask,TLCs Selectively Boost PSD Profiles Yields up to 8Mbps GainSince the higher frequencies in the copper spectrum are most susceptible to noise andattenuation, PSD bit-loading favors use of the lower spectra. Yet Phylogy has developed aproven shema to effectively extend bit-loading across these higher frequencies. Phylogyoperates in tandem with all xDSL chipsets to exploit these PSD physics:► DSL chipsets sense the length and condition of each subscriber service pair and then tunes the gain of its line driver amplifier to optimize gain for that lines length and resistance profile.► DSL chipsets always profile each subscriber line during initialization by communicating with the subscriber modem. But with a TLC inserted midpoint into this circuit, the DSL chipset in the DSLAM now senses the TLC as the modem.TripleStream Line Conditioner September 2009 Page 8 of 36
  9. 9. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSL► During re-initialization, the DSL chipset now characterizes a conditioned service pair as being only half as long as the original modems distance.► Now the line driver in the DSLAMs chipset lowers its gain for that line, sending out a cleaner, lower-noise signal.► Additionally, the bit-loading algorithm in each DSL chipset now profiles that service pair as a cleaner line and correspondingly loads more data into the higher spectra of the copper medium.Sending a Higher-Spectrum Signal Farther than DSL Chipsets CanWith additional data now re-mapped into higher PSD bins, Phylogy successfully extends thereach of the 2-to-4Mhz bins four ways:1) PSD shaping induced by TLCs results in DSL carrier noise being up to 6dB lower when it arrives at the TLC node2) TLCs then apply additional active noise cancellation using common-node rejection to notch-filter RF interference3) Full-spectrum amplification is then applied using variable DC gain. During initialization, TLCs profile the carrier amplitude received form the DSLAM and apply DC gain to compensate for line loss, optimized on a line-by line basis4) Selective spectrum amplification is finally applied to further boost the higher frequency PSD bins. Using peaking equalization, the TLC boosts gain on those data-rich PSD bins in the 2-to-4Mhz range of the copper medium.Typical Reach Extension Delivered by TLCs over 26AWG CopperBelow is shown four real-world measurements of in-service DLS extension using TLCs in a26AWG access loop.TripleStream Line Conditioner September 2009 Page 9 of 36
  10. 10. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLSummary Performance Gain for VDSL2Combining the cleaner signal transport, higher bit-loading, and intelligent power boost features ofTLC, the chart at right plots the 10Mbps bandwidth gain the TLC delivers at 5Kft of reach. Wherethe VDSL2 performance for HDTV services falls below 25 Mbps at 3.5Kft, the TLC performanceassures subscriber satisfaction for HD IPTV services 50% deeper into the distribution area.TripleStream Line Conditioner September 2009 Page 10 of 36
  11. 11. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLV. Service Applications Across the NetworkExtending IP Service TiersThe primary application of TripleStream® Line Conditioning (TLC) is to optimize access networkperformance. All classes of revenue services are extended deeper into the distribution area,reaching both the unserved and under-served subscriber. To achieve this objective, TLCtechnology applies to all xDSL broadband applications within the access network:● Brings new service to unserved or “dead zone” distribution areas (DAs)● Boosts reach and bandwidth in existing “underserved” data-only ADSL and ADSL2+ service areas● Extends service areas for existing ADSL2+ IPTV installations (standard definition SDTV)● Extends the service area for existing VDSL2 IPTV service areas (high definition HDTV)● Lowers the deployment costs up to 30% for new VDSL2 IPTV service areas (high definition HDTV)Conditioning the Loop - Two Application OptionsBy providing highly scalable and flexible options for deploying the TLC solution (see sectionVI), Phylogy enables two primarily different yet highly complementary service applications:● “Quick-Turn Provisioning” supports on-demand installation of small line-count TLC nodes to boost bandwidth for underserved individual subscribers. Fast, cheap, and easy to deploy, these band-aid installations let you opportunistically protect your subscriber base against competitive erosion and provide revenue-enhancing service upgrades for time-sensitive special projects.● “Standard-practice network conditioning” engineers the access network using line conditioning across the CSA to support higher aggregate bandwidth capacity and higher efficiency of all xDSL assets. Described as “Best Practices Network Engineering” in Section VIII, this method significantly improves both network performance and utilization of existing xDSL assets including DSLAMs, remote terminals, fiber backhauls, and CO switchports.TripleStream Line Conditioner September 2009 Page 11 of 36
  12. 12. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSL How TLC Extends IP Service TiersA) Leveraging Remote TerminalAssets to Extend IP Service TiersTLCs extend all IP service tiers deeper intothe DA, providing up to 300% more aggregatebandwidth capacity for the underserved andunserved areas (ref pg. 29). Diagrams (right)show the logical migration of existing xDSLservice tiers to a higer revenue-generatingcapacity using TLCs.Chart 1)Typical RT/DSLAM installation supporting fivetiers of IP services:• HDTV-grade IPTV over VDSL2• SDTV-grade IPTV over ADSL2+ or VDSL2• Under-served, VoIP & data-only• Under-served, data-only over ADSL2+• Unserved areas in the DSL “dead zone”Chart 2)Opportunity to upgrade each tier to the nexthigher revenue catagory, based on theextended bandwidth rates that TLC provides.Chart 3)Installation of four 50-line TLC cabinets andthe subsequent boost in bandwidth that eachone delivers to support the rapid upgrade ofall service tiers.Since present DSL methods create larger-than-expected dead zones, Phylogy makesthe penetration of these unserved and under-served markets easier, faster, and cheaperthan using the traditional approach of addingmore RT/DSLAMs.Chart 4)Additional bandwidth for each service zone.The revenue increases made possible by theTLC service expansion are significant,effectively doubling the service area for eachservice tier. Yet these revenue gains areachieved with no CAPEX spending toupgrade the existing xDSL infrastructure.With TripleStream, existing RT, backhaul, andDSLAM are better-utilized to generate ahigher return on this legacy investment.TripleStream Line Conditioner September 2009 Page 12 of 36
  13. 13. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLB) Extending Revenue Services from the Central OfficeFor carriersworldwide, and forseveral in NorthAmerica, xDSLserved from thecentral office (CO)is common practice.Emerging marketsare especiallyinterested in addingor augmenting theirbroadbandinfrastructurewithout usingremote terminals(RTs).The obvious economy of adding new subscribers and upgrading existing ones without thecost of new RTs, backhauls, and DSLAMs is a compelling application for TLCs.Since TripleStream Line Conditioning applies to all xDSL broadband applications, it is thelogical choice for extending and accelerating the broad-scale deployment and augmentationof broadband services across the access network without reliance on costly RTinfrastructures.● Extending ADSL2+ data service by 3 to 5 kft, bringing new service to unserved dead zones;● Boosting VDSL2 IPTV bandwidth (at 6 Kft reach) from 10 Mbps traditional up to 20 Mbps conditioned to enable High Definition TV service; and● Extending service area for 25 Mbps IPTV (Hi-Def) from 2.7Kft traditional out to 4 Kft conditioned.TripleStream Line Conditioner September 2009 Page 13 of 36
  14. 14. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLThe Subscriber Service Area (CSA) map below illustrates both the extension andaugmentation of broadband applications enabled by a CO-fed TLC network architecture. Augmenting CO-Fed Service Tiers Using TLC without New RT / DSLAMSBy comparing installation requirements for a CO-fed TLC network versus a new remoteDSLAM, the cost savings are clearly obvious (and are tallied in section XI). But perhapsmore important for some carriers is the ability to rapidly capture new subscribers with TLC’shuge time-to-market advantage of weeks versus months.TripleStream Line Conditioner September 2009 Page 14 of 36
  15. 15. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLC) Deploying New RT-Fed TLCs Reduce Dependence on RT / DSLAMsSubscriber Service Areas 1)Shown at right is a comparisonof the network infrastructurerequired to provide HDTVservice at 26 Mbps to 740 newsubscribers.Step 1)The new customer service area(CSA) that is currently beyondthe service reach of existing RT/ DSLAMs.Step 2)The traditional method (PMO)of service extension requiringdeployment of three new RT /DSLAMS serving a 768-line 2)CSA.Step 3)The use of four 96-slot TLCcabinets plus one new RT /DSLAM serving the same 768-line DA.● Using DSLAMs without line conditioning limits the reach of VDSL2 service for HDTV to 3.5 kft or less, requiring three new RTs with pads, cabinets, power, backhaul and 280-port DSLAMs to serve the new 740-subscriber area. 3)● By adding four 192-line TLC cabinets, a single 768-line DSLAM can service the entire CSA.● A cost-itemized comparison including hardware and labor is provided in section X, entitled “Business Case for TLC”TripleStream Line Conditioner September 2009 Page 15 of 36
  16. 16. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLVI. Installing TLC Nodes into the Network Using “Speed Splice” SolutionsOne-Day Installation Turns Up 100+ HomesPhylogy offers a fully-documented field installation planwith scalable options to accelerate xDSL expansion for anyaccess network configuration. Abundantly detailed tomatch specific needs, this full suite of speed-splice optionsmakes TLC the fastest time-to-market and fastest time topayback of any xDSL expansion option. One to 192 lines per TLC enclosure Full Range of FlexibleSpeed-Splicing OptionsTLC line cards are deployed using Phylogy’s speed-splice enclosures which range fromsingle-line packages to 192 line metal cabinets. All enclosures are simply spliced into thetelco cable, using industry-standard splice modules. These simple snap-fit connections –such as 3M’s™ “MS²™” splice modules – are all that are required to install the necessarysignal and power connections to Phylogy’s TripleStream Line Conditioners.TripleStream Line Conditioner September 2009 Page 16 of 36
  17. 17. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLA) Deploying 1, 5 and 20-Line TLCs Into Existing Aerial Splice CasesFor small applications serving a few households, TLCs can be conveniently mountedadjacent to aerial splice junctions. Pole-mounted options include:● Single-line metal enclosures Pole-Mounted Options Support● 5-slot or 10-slot weatherized polycarbonate 1 to 30 Ports of Line Conditioning housings featuring bolt-on brackets● Metal or polycarbonate pedestal closures containing either or both of the 5-slot and 10- slot housings.These pole-mount options can be quickly hand-spliced using traditional Scotchlok™ splicemodules. Where existing “MS²™” splice modulesare available in the aerial splice case, the 5-slotand 10-slot enclosures can also be supplied withquick-connect MS² pigtails.Phylogy’s new dual-port TLC line cards enablesdouble the enclosure capacity for improvedeconomy. For example, the 10-slot case can beupgraded to serve 20 subscribers with no changeto the enclosure itself. Phylogy Pedestal Option for 5- to 30-Port Aerial Splice Applications Charles CPLS PedLock shownTripleStream Line Conditioner September 2009 Page 17 of 36
  18. 18. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLB) Rapid Access to Buried Plants Using Existing Splice Pedestals and Standard-Practice Quick-Splice Procedures By definition, splice points are broadly available across all distribution areas. These Typical Quick-Connect Splicing provide easily-accessible junction points for Feature Found in Most Splice speed-splicing TLCs wherever needed. Since Pedestals Used in Buried Plant the splicing tools and skill set are part of every telco’s standard-practice procedures, insertion of TLCs is a rapid, low-cost process requiring no new training or tools. Splice pedestals are a standard network component used for underground installations. Shown at left the pedestal cover removed to reveal a cable splice junction (2). Most often these cable splices are performed using splice modules such as 3M’s™ “MS²™” splice modules which provide rapid quick-connect 1) installation. These MS² splice modules are used as standard- practice procedure for buried plant because they 2) provide flexible network planning and expansion options for adding new subscribers to existing cable grids. The sequence at left demonstrates the speed- splice process. Starting with (2) an existing MS² is shown. In (3), this splice block has been separated, and in (4) a new MS² junction 3) serving the TLC is being snap-fitted onto the subscribers’ existing service cable. Not shown is the second TLC splice made similarly to the DSLAM serving cable. All TLCs can be ordered with pre-installed MS² or any other desired type of splice junction to support speed-splicing. Once this simple splice block is mated, all required electrical connections have been made in a 4) single quick-connect operation.TripleStream Line Conditioner September 2009 Page 18 of 36
  19. 19. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLC) Upgrading Existing Splice PedestalsFor buried plants, the telco benefits from the quick installation offered by Phylogy’s TLC.Five to 30 lines can be upgraded in a few hours via the speed splice operation shown below.Higher capacity options are shown on the next page for conditioning up to 192 lines.Shown below is the sequence used for adding a 5 – to 30 line TLC enclosure to an existingsplice pedestal. This speed splicing procedure uses the industry-standard splice juctionssuch as 3M’s MS². Image 1) The existing splice juctiion, ready for upgrade. Image 2) MS²junction has been separated. (NOTE: bridging connectors are used during this step to avoidservice interruption, but are not shown.) Image 3) Five-line TLC unit preconfigured withintegrated support frame and MS² pigtails dropped over the base of an existing splicepedestal. Both a 5 and 10-line unit will fit into the pedestal to condition 30 pairs using ourdual-port lince cards. Sequence for Upgrading an Existing Splice Pedestal Supporting 5 to 30 PortsOnce the TLC is quick-spliced between the DSLAM cable and the subscribers’ feeder cable, theunit can be closed up and secured. No other engineering, provisioning or power supply work isrequired, and all necessary electrical connections are made within the simple MS² junction.Splicing onto Existing Cross-Connect CabinetsOur weatherized polycarbonate housings can also be bolted onto or placed inside existingcross-connect cabinets. Flexible Options for Inserting 5 to 96 Ports of Line Conditioning Using Existing Cross Connect CabinetsTripleStream Line Conditioner September 2009 Page 19 of 36
  20. 20. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLD) Adding New TLC Cabinets to the NetworkThe six-step diagram below itemizes the installation process for speed-splicing a new 24 to192-port Phylogy cabinet. Step 1) The original splice pedestal with its buried cable. Step 2)shows the original MS² splice juction exposed and the new concrete pad and Phylogy cabinetinstalled. Step 3) shows the original splice block separated. Step 4) shows a pre-connectorized 20-foot cable tail trenched between the pedestal and new cabinet. Typicallythis 20’ cable would be laid prior to the concrete pad being set and would thread through acenter hole in a precast pad.Step 5) illustrates the quick-connect crimping process used to join both: a) inside the pedestal - the main cable junction and the pigtail junction to the TLC cabinet b) inside the cabinet - The cabinet rack can ship with MS² slice junctions supplied (or any other preferred standard splice juction) for quick connect to the 20” pigtail cable.Co-Locating New Phylogy Cabinets serving 24 to 192 Ports of Line ConditioningTripleStream Line Conditioner September 2009 Page 20 of 36
  21. 21. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLE) Design Rules for Placing TLC Nodes in the Loop for Optimal PerformanceIn applications where the copper loopuses a uniform wire gauge, TLCs can be Inserting the TLC half the distanceplaced mid-span between the DSLAM and between the DSLAM and the CPEthe subscriber’s CPE. This mid-way for VDSL2 Installationslocation is flexible within plus or minusone thousand feet, and delivers themaximum boost in bandwidth for thosesubscribers.A second method is also used when thecopper transport uses mixed wire gaugesor has excessive line disturbers likebridge taps or coils. These conditionsresult in a non-linear line resistance. Thusthe physical length location method inOption 1 will not optimally site the TLCnode. In this case, the planner shouldcalculate the loop mid-point according toloop resistance rather than distance. Tosimplify placement planning for preciselylocating optimal TLC positioning, Phylogysupplies easy-to-use planning charts.F) Utilizing Existing Network Splice Points for Optimal TLC PlacementAs we have shown, all multi-line TLC Matching TLC Insertion Pointsenclosures can be installed through to Existing Speed-Splice Pointsa familiar quick-splice procedure.Shown below is a “to-scale” diagramof an underground plant having thetypical placement of splice pedestalsevery 600 to 800 feet.Notice that the broad availability ofthese existing splice pedestalsprovides more-than-adequatelocations for easily inserting TLCnodes consistent with the optimalarchitecture design rules describedpreviously. No difficult trenching ormanual splicing would be requiredfor deploying TLC nodes in theiroptimal position in this type of buriedplant.TripleStream Line Conditioner September 2009 Page 21 of 36
  22. 22. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLVII. TripleStream® Line Conditioner ProductsA ) L i n e C a r d ConfigurationsPhylogy offers a family of standards-based TripleStreamLine Cards to support the full-range of applications. Theseoptions provide for flexible allocation of bandwidthallocations, allowing a telco to customize service levels tosubscriber plans.Phylogy’s “Triple Play” models maximize data rate on shortloops while “Extended Reach” models maximize reach onlong loops as shown below.Phylogy’s line cards can easily be added individually or replaced by the telco to matchsubscriber demand. This flexible, one-hour, on-demand deployment capability has no impacton neighboring line cards or copper pairs.Subscriber turn-up is automatic, taking only minutes to perform. The TLC’s self-calibrationcompletes in conjunction with DSLAM and modem’s normal DSL training phase. Shown at left, VDSL2 line cards are available in dual-port configurations to double service densities and reduce costs in advanced networks.TripleStream Line Conditioner September 2009 Page 22 of 36
  23. 23. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLB) Line Card Quality and ReliabilityTripleStream has been tested on multipleDSLAMs and modems around the world,proven in hundreds of real-world applicationsto certify its high product reliability:• TLC designs are engineered to assure performance in the harshest environments;• Components are Military-grade and Industrial-grade;• All products are designed, manufactured, and tested to meet the needs of worldwide markets: FCC emissions immunity test; GR-1089 Lightning/Overstress tests; Accelerated Life Testing; Temp cycle testing (-40 to +65C); ISO9000 manufacturing assures quality control; and CE and RoHS models available.TripleStream Line Conditioner September 2009 Page 23 of 36
  24. 24. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLC) Enclosures: 5-to-20 line Hubs and 24-to-192 line CabinetsTripleStream™ Enclosure Solutions are designed to provide ease of deployment andmanagement of TripleStream™ Line Conditioners. Once the enclosure is spliced into themain telco cable, Line Conditioners are added by plugging them into the enclosure’sassigned card slots. All card-slot shelves provide plug-&-play docking of line cards into thebackplane which is pre-connectorized to the cross-connect block.Should a carrier or reseller wish to use their preferred supplier for cabinet enclosures insteadof these Phylogy models, Phylogy will license the reference designs for all backplanes andcard chassis.Shipped from the factory fully tested and ready for deployment, Phylogy enclosures areavailable in capacities ranging from 5 to 192 ports, configurable by the telco in the field.Individual line conditioner cards are also available for order.The 5, 10, and 24-slot models are available in weather-hardened lockable polycarbonateenclosures. When populated with the new dual-port line cards, these cabinets will provideline conditioning for 10, 20, and 48 subscribers. Phylogy’s 48- and 96-slot models aremanufactured in heavy-gauge steel and high-density cross connect fields are provided tofacilitate rapid installation and maintenance. These 48 and 96-slot models will alsoaccommodate the new dual-port line cards to provide 96 and 192 port capacities. All modelsalso incorporate an “in” and “out” stub box to provide a weatherized enclosure for cablesplice protection.TripleStream Line Conditioner September 2009 Page 24 of 36
  25. 25. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLVIII. Planning Options that Maximize Network UtilizationA) Revenue Capacity, Transport Efficiency, and Equipment UtilizationTripleStream can be readily standardized Deploying VDSL2 Service Areas:as a “best-practices” network engineering The Planning Challengearchitecture to maximize both thebandwidth capacity and the bandwidthtransport efficiency of any existing xDSLnetwork. The TLC solution achieves thisvalue-add by serving as a bandwidthbooster on a line by line basis, and thendelivering higher aggregate bandwidthacross the DSLAM and its backhaul. TheTLC method achieves higher equipmentutilization across the entire accessnetwork including switchports and fiberbackhauls – delaying the need to expandthose assets even as subscriberbandwidth increases.Why current VDSL2access networks are underutilizedAs defined in the Executive Summary, original VDSL2 specs and resulting DSLAM designrules were intended to reach more subscribers with higher bandwidth. Yet telcos havereluctantly dialed back HDTV-quality reach by 30% to 50% due to lower actual performance.This rollback has driven IPTV deployment costs higher and have left “subscribers willing topay” either underserved or unserved. Phylogy’s TLC provides a means for the carrier to re-establish a more profitable network architecture which enables: Deploying VDSL2 Service Areas:● Higher DSLAM and Remote Present Method of Operation (PMO) Terminal (RT) utilization;● Higher transport efficiencies across fiber backhauls; and● More efficient utilization of switchports.Shown here is a diagram of threesecond-tier DSLAMs with their fiberbackhauls branching off from a tier1DSLAM. This tiered architecture hasbecome standard practice for extendingxDSL service deeper into unserved andunderserved markets – and it is thesesecond-tier RTs that suffer lowerequipment utilization due to their limitedVDSL2 reach for HDTV services.These second-tier DSLAMs essentiallyprovide reach extension and bandwidthaggregation for the Tier1 DSLAMs.TripleStream Line Conditioner September 2009 Page 25 of 36
  26. 26. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLBandwidth AggregationReach extension and bandwidth augmentation are achieved more quickly and economically byusing TLCs instead of deploying Tier 2 DSLAMs.● Underutilized DSLAMs Present Method of Operation (PMO) with empty slots: RT infrastructure and RT cost is fixed for civil engineering, planning, power and cabinets. Fewer ports served per capital outlay decreases cost efficiency; and● Underutilized Backhaul: new tier 2 DSLAMs serve to aggregate bandwidth for the tier 1 DSLAM, but the GigE fiber serving the tier 2 DSLAMs runs mostly empty due to the VDSL2 service limitations of that DSLAM.The bottom chart shows replacement of Tier2 DSLAMs with TLCs to deliver better utilization ofthe Tier1 RT / DSLAM assets at lower overall cost, and with much faster time to market. ThusDSL assets become more fully utilized when leveraged with TLC:● TLC aggregates A Better Way to Engineer xDSL Access Loops bandwidth for the Tier 1 DSLAM backhaul while eliminating need for inefficient Tier 2 fiber optics● Original Tier1 DSLAMs are better utilized as their slots are filled with additional xDSL line cards to feed the new TLC distribution area● ROI on the existing Tier1 RT infrastructure goes up while CAPEX cost of Tier2 RT / DSLAMs is eliminated by using the simpler TLC option.TripleStream Line Conditioner September 2009 Page 26 of 36
  27. 27. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLB) Scaling Extended Reach into Expanded Distribution AreaNow lets examine expansion of thenetwork area. The ability to A Better Way to Engineer xDSL Access Loopseconomically scale the TLCsolution is an important advantagesupporting a “Best Practices”network deployment.These two diagrams quantify howa 2.7 kft extension of VDSL2 reachtranslates into service expansionacross an entire CSA.The TLC linear extensioneffectively applies to a radial area πcalculation using R2 to observeservice area gain. While thegeometry of real-world DAs do notfit a perfect circle, and effectivereach is reduced by indirect wiringpaths, these comparisons providea useful view of the scalingcapability of TLCs.The DA covered by CO-fed VDSL2with a 3.5 kft reach is 38,484,600square feet. The DA covered byTier1 DSLAMs serving VDSL2another 3.5 kft equals 153,938,400sq ft minus the original CO-fedarea, delivering a RT-fed DA of115,453,800 sq. ft.Next, for the area traditionallyserved by Tier 2 DSLAMs, wecalculate the DA provided by a TLCextension of 2.7 kft for VDSL2 at25 Mbps. This TLC-fed DAdelivers an area of 295,593,144sq. ft. Subtracting the Tier1DSLAM area and the CO-fed areayields a TLC-fed DA of103,170,144 sq. ft. which is 89%of the service area covered byTier1 RT / DSLAMs.Finally this TLC-fed DA can bedeployed in a tenth of the time and 1/3 less cost than that required by RT / DSLAMs. Webelieve these figures validate the TripleStream Line Conditioning method as the “best-practice” xDSL architecture for delivering maximum network utilization, best CAPEX value,fastest time-to-payback, and the best subscriber acquisition value for wireline carriers.TripleStream Line Conditioner September 2009 Page 27 of 36
  28. 28. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLC) Comparing Aggregate Bandwidth Augmentation Across a DATripleStream deployment increases aggregate bandwidth across an entire Distribution Areato add significant revenue-generating value to the existing plant.Below is a comparison between the aggregate bandwidth supplied by using a traditional RT-fed DSLAM versus the same RT / DSLAM augmented with TLC. The upper half of thisdiagram shows the bandwidth delivered to each service tier by the CO-fed and RT-fed DAs.The “Best Practice” bottom half shows the bandwidth upgrade delivered for each service tierby TLC augmentation. The blue circles quantify the net gain delivered to each service tier.As an example, the 18 Mbps “PMO” subscriber is upgraded to a 25 Mbps service. This7 Mbps gain could support multiple SD video streams or one HD video stream, and a morerobust Internet experience.TLCs can boost the aggregate bandwidth across all these extended service tiers by 300%over the amount delivered by the original RT-fed DA. If one assumes a single subscriber ineach of the six extended service tiers, the aggregate bandwidth gain possible across all sixextended tiers totals 75 Mbps. This aggregate capacity represents a 300% increase in thebillable bandwidth available from TLC “Best Practices” network engineering.TripleStream Line Conditioner September 2009 Page 28 of 36
  29. 29. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLD) Key Advantages for the CarrierPhylogy’s ability to accelerate a telco’s attainment of ARPU & ROIgoals is based on delivering a synergy of accelerated rate, reach, andrevenues. An itemized business case analysis follows in the nextsection, but a summary of the TLC cost advantage is listed below.More than a band-aid for marginal service areas, TripleStream® LineConditioning is the most viable option available for improving bandwidth across the entireDSL network. Because it delivers the best ROI – and the fastest time-to-payback – amongxDSL options for service extension, line conditioning can be adopted as a standardized“best-practice” network engineering strategy across all access loops serving broadbandtoday.Conditioning the LoopWhen TripleStream® is deployed as part of standardized network design & engineeringpractice, it can triple aggregate bandwidth capacity across xDSL distribution areas at one-third less cost than present methods of operation ($353 vs. $533 per subscriber line). Thuswe are suggesting that TLC offers the wireline carrier an optimal design practice forengineering maximum ROI from all existing and planned xDSL network assets.TripleStream Line Conditioner September 2009 Page 29 of 36
  30. 30. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSL BEST PRACTICE for xDSL NETWORKS: “CONDITIONING THE LOOP” PRESENT xDSL METHODS - PMO TLC “BEST PRACTICE” SLOW DEPLOYMENT - 12 to 18 month delay to plan and ACCELERATE DEPLOYMENT 800% deploy RT DSLAMs versus six weeks for TLC HIGH COST - New RT / DSLAMs require power, back-hauls, REDUCE DEPLOYMENT COSTS civil engineering, pedestals and new copper LOW BANDWIDTH – even new DSLAMs are not capable of INCREASE AVAILABLE BANDDWIDTH delivering maximum DSL bandwidth across CSA IN THE ACCESS LOOP UP TO 300% LOW UTILIZATION - RT DSLAMs not fully loaded due to reach DSL INVESTMENTS FULLY LEVERAGED limitations - DSL Network is Under Utilized TO MAXIMIZE ROITripleStream Line Conditioning offers the fastest and lowest-cost architecture for extendingDSL services. Rather than adding more costly RT / DSLAMs to extend reach and rate,augmenting both existing and new DSLAMs is the more economical, efficient, and fastersolution for satisfying both unserved and underserved broadband markets: ● Fastest time-to-payback of any xDSL extension option Installs in days vs. months to add new revenue streams quickly; Does not require permitting or civil engineering; Requires no IT OPEX, training or headcount; Highly flexible for on-demand installation to capture subscriber demand opportunistically; and Immediate ROI from new subscribers when installed on-demand. ● Extends All IP Service Tiers Deeper, adding up to 300% more aggregate bandwidth in underserved and unserved areas Defends service areas against competition, minimizes churn, boosts customer loyalty; Improves utilization of backhaul capacities Delays cost of adding second and third-tier DSLAMs ● Maximizes Return on all the installed xDSL Assets Fully standardized and productized for broad-scale deployment as a standardized xDSL architecture; Leverages the embedded copper base and existing RT / DSLAM investments to improve the ROI from legacy assets; Can double revenues per RT/DSLAM Minimize the need for costly FTTN Installations; Simplified xDSL installation cuts CAPEX cost of service extension up to 34 percent.TripleStream Line Conditioner September 2009 Page 30 of 36
  31. 31. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLIX. TLC Network Management StrategyA) Protecting Lifeline POTS IntegrityEach Triple Stream line card contains a bypass splitter so that the POTS (voice) traffic is alwaysavailable, even if the Triple Stream port fails. For diagnosing physical line discontinuity, theTripleStream modules contain a “loop around” feature to allow normal mechanized loop testingsuch as MLT and 4Tel.B) TLC Node Management Using “Standard Operating Procedures”Phylogy has formulated a method for managing TLC network nodes which is founded onsimplicity and lowest-operating-cost strategies. To engineer the TLC advantage of self-powering,which eliminates complexity and costs, it was designed to operate within a ¼ watt limitation.Thus the TLC circuit design is extremely efficient and provides no active element managementinterface.TLC operates as a Passive Device in the NetworkMuch like splice blocks and line coils are passive devices, the TLC line card operates passivelywithin the network. It is completely transparent to both signals and active network componentslike DSLAMs and CPE modems. The operational status of the TLC is easily monitored andalarmed using DSLAM management tools the carrier currently uses. The presence or loss ofxDSL signal, and transmit rates of TLC-enabled lines are all shown via the existing ElementManagement Systems (EMS).Monitoring the 48V POTS PowerThe presence of the standardPOTS ring voltage is monitoredusing the telco’s standardoperating procedures.Monitoring Line-by-Line xDSLCircuits via Existing EMSAny disruption of xDSL service –whether at the DSLAM or at thesubscriber modem isimmediately alarmed andidentified line-by-line using thetelco’s existing EMS tools. If aTLC line card fails, these alarms will indicate this outage but POTS will not be interruped.Appropriate response is the standard copper maintenance practice.TLC’s Standardized Quick-Swap FeatureCross-connect fields are integral for all installations using the TLC metal cabinets. Standardoperating procedure includes one or two spare line cards pre-installed into these cabinets. Thusrecovery from a failed line card requires only a swap of the jumper block on the cross-connect tomigrate the subscriber to an operational TLC line card.C) Advantages of the TLC Management Strategy ● Power-conservative, no added power equipment; ● No EMS training or new software required; ● No added IT investment or complex operations integration effort required; ● No operational impact outside of existing standard procedures; ● Makes installation and operation of TLC transparant to present methods of operation; and ● Fully compliant alarm and monitoring of active xDSL performance.TripleStream Line Conditioner September 2009 Page 31 of 36
  32. 32. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLX. An itemized cost-comparison business caseThis cost comparison was generated from a real world deployment in a 4 kft by 6 kftcustomer service area (CSA) originally fed from a 198-line RT.The objective is toextend IPTVservice capable ofdelivering 25 Mbpshigh-definition IPTVbeyond the existing3.5 kft distributionarea (DA) of theoriginal RT /DSLAM.This CSA serves456 homes in anupscaleneighborhood withan anticipated takerate of 65% for HDIPTV. The goal isto provide 300 newVDSL2 serviceports serving 25Mbps each.This CSA wasoriginally suppliedby four coppercable legsextending from theoriginal RT. Theunderserved areabeyond the originalHD-IPTV reach isshown below inyellow.TripleStream Line Conditioner September 2009 Page 32 of 36
  33. 33. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLPresent methods of service extension would require the installation of two new RT /DSLAMs, each serving 25 Mbps out to 3.5 kft as shown below. The actual installation usingTLC augmentation used only one new RT / DSLAM plus twelve, 25-line TLC units.The four copper legsextending from theoriginal RT/ DSLAM areshown by the orangelines above. Shown inred below are the 100-pair cables that must beeither:● Terminated and re- homed to the new DSLAMs● New copper legs installed to bridge the new DSLAMs to the existing cable runs These new legs are required to shorten the loop length in the DA to meet the 3.5 kft VDSL2 design rule.A key factor of TLC’s low installation costs is the lower labor and cable cost required to re-home copper legs to new DSLAMs.The cost significance ofthis re-homingrequirement is two-fold.1) The addition of new100-pair copper legshas risen 300-to-400%as the price of copperhas climbed.2) The labor required tore-home the fourexisting 100-pair legs isa significant cost. Bothof these costs aretypically not fullyunderstood oraccurately tabulatedwhen considering newRT installations.TripleStream Line Conditioner September 2009 Page 33 of 36
  34. 34. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLPMO CostsIn the chart below, the line-item costs for present methods of operation (PMO) are tabulatedat right.Two new RT / DSLAMsrequire two new fiberbackhauls andextensive copper re-homing.Both of these DSLAMsalso require a newswitchport to beinstalled back at theCO switch.The total cost of laborand materials for thisPMO installation is$151,000.TLC CostsShown below is the actual labor and materials cost required to install only one newRT / DSLAM along with the appropriate TLC. The new DSLAM was provisioned with 153VDSL2 ports while the original RT/ DSLAM was expanded with 130 additional VDSL2 ports.New fiber backhaul is required, and the reduction in copper re-homing costs yields a $50kcost savings.When the total cost of the PMO installation is divided by the number of new subscribersserved, the PMO cost is $533 per subscriber versus only $353 for the TLC architecture. This$180 per subscriber saving yields a faster time-to-payback with TLCs than present methodsof operation.TripleStream Line Conditioner September 2009 Page 34 of 36
  35. 35. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSL XI. About PhylogyThe genesis of Phylogy began in 2003 when two senior designengineers were developing signal regeneration technology forvideo applications over copper. Employing line boostingmodules at both the origination & destination terminals, theyrealized that a single mid-line solution at half the cost couldprovide similar advantages for xDSL optimization. Together, Mr. Luis Larzabal, now Phylogy’s Chief Technology Officer and Mr. Edward Ponganis, now Chief Product Development Officer, initiated a classic Silicon Valley technology incubator in their garage where they observed incredible results at the breadboard level. Small-scale private investments then moved this concept stage into early prototyping focused on developing a low-power solution that could operate on the POTS 48 volt supply commonly used in telco networks. The next few years were spent refining the circuitry, reducing power consumption, and designing weatherized packaging and circuitry refinement, and a leading RBOC provided early guidance & product recommendations for optimizing TLC to serve their emerging ADSL applications. Phylogy was incorporated in 2004 and the following year attracted professional management to lead the company and raise more than $12M for R&D, product commercialization and marketing. Phylogy recorded their first sales to IOCs serving long-reach rural subscribers with ADSL.TripleStream® was then optimized for ADSL2+ and large scalevolume production of TripleStream® Line Conditioners rampedup in late 2006 in response to growing demand for extendedIPTV service reach among IOCs.VDSL2 development began in 2007 with finalengineering focused on delivering the QoS improvementrequired by leading telcos.Finally, in support of the VDSL2 program, Phylogy iscurrently cost-reducing the high-density cabinets thatwill make large-scale VDSL2 deployments the mostcost-effective for IPTV service extension.TripleStream Line Conditioner September 2009 Page 35 of 36
  36. 36. Phylogy Solution Whitepaper: Line Conditioning for Accelerated xDSLXII. Definition of AcronymsADSL Asynchronous Digital Subscriber Line, the most common DSLADSL2 Next Generation ADSL with longer reachADSL2+ Current Generation of ADSL with longest reachARPU Average Revenue per User, average of all telco subscribers’ monthly paymentsAWG Average Wire Gauge, thickness of the copper wireCAPEX Capital Expenditure, all costs related to hardware & installationCO Central Office, location of most telco equipment as compared to the RTCO-fed Services being supplied directly from the CO instead of from an RTCPE Customer Premises Equipment, the DSL modem in the subscribers’ homeCSA Customer Service Area, the entire subscriber area served by a telcoDA Distribution Area, the service area fed from a DSLAM based in CO or RTDSL Digital Subscriber Line, common term for all xDSLDSLAM Digital Subscriber Line Access Multiplexor, equipment that supplies DSLEMS Element Management SystemFTTH Fiber to the Home, more costly option to xDSL over existing copper wireFTTN Fiber to the Node, hybrid option uses both fiber & existing copper wireHD-IPTV High Definition IPTV, requires 6 to 8 Mbps of bandwidthHDTV High Definition Television, requires 6 to 8 Mbps of bandwidthIPTV Internet Protocol Television, TV supplied via telco’s using xDSLIT Information Technology, computer & software support hardware & servicesKft One Thousand FeetMbps Megabits per Second, standard measure of bandwidth capacityMS² Trademarked name of standard splice block made by 3M CompanyNEXT / FEXT “Near End” and “Far End” Crosstalk, noise that reduces DSL bandwidthOPEX Operating Expenditure, all costs related to ongoing operation & maintenancePMO Present Method of OperationPSD Power / Spectrum Density, map showing signal power of any DSL linePSD MASK Power / Spectrum Density, map showing signal power of any DSL lineROI Return on Investment, measure of profitability from an investmentRT Remote Terminal, a field cabinet containing telco electronic equipmentRT / DSLAM DSLAM equipment located in the field instead of the CORT-fed Services provided from an RT versus provided from the COSD-IPTV Standard Definition IPTV, requires 2 to 4 Mbps of bandwidthSDTV Standard Definition Television – requires 2 to 4 Mbps of bandwidthSNR Signal to Noise Ratio, higher SNR equals cleaner signal & higher bandwidthTLC TripleStream Line ConditionerVDSL2 Video Digital Subscriber Line, highest bandwidth version of DSL for videoxDSL Digital Subscriber Line, technical term referring to all possible types of DSL Phylogy Corporate Offices 2350 Mission College Boulevard Suite 400 Santa Clara, CA 95054 866-PHYLOGY (866-749-5649) email: physales@phylogy.comTripleStream Line Conditioner September 2009 Page 36 of 36