Drivers for FTTx
Why fiber
Fiber feeds everything
Flavors of FTTX
Nuts and bolts – the components
Installation techniques
Network design configurations
Machines & Tool
FTTx Roll out /Delivery Mechanism
Outside Plant Fiber Optic Cable
Fibre entering in Building design
Aerial Cable Construction Tool
Spicing Machines & Other Tools
Passive infrastructure of FTTH networks: an overviewLuc De Heyn
Presentation of the FTTH Council webinar on September 2014. A general introduction to FTTH passive infrastructure and a view on the latest trends.
Speaker: Raf Meersman, CEO of Comsof
More info on planning & design of FTTH infrastructure: http://www.fiberplanit.com
These are sample slides taken from my 4 days long "GPON-FTTx" training course. This course has over 380 slides and it is a great source of learning about various topics related to GPON & FTTx. There are tons of exercises and real-world examples provided in teaching material.
Presented by Mark Boxer & Jeff Bush of OFS
Agenda:
• Why Fiber?
• Fiber Feeds Everything
• Nuts and Bolts -The Components
• Installation Techniques
• Network Architectures and Planning
Zyxel’s Fiber Access solution provides versatile fiber connectivity for service providers according to the deployment requirements. Service providers can highly optimize and integrate various FTTx applications with the freedom to deploy services easily on GPON, GEPON, Active Fiber solutions with OLT, ONU/ONT and active fiber gateways.
Fibre optic FTTH FTTX network design, engineering and planning solutions,van den Dool Dick
Fibre optic FTTH FTTX network software solutions to design, engineer & plan FTTH / FTTX networks cost optimized automatically. Shows the required input, design phase and output to Autocad etc.
Drivers for FTTx
Why fiber
Fiber feeds everything
Flavors of FTTX
Nuts and bolts – the components
Installation techniques
Network design configurations
Machines & Tool
FTTx Roll out /Delivery Mechanism
Outside Plant Fiber Optic Cable
Fibre entering in Building design
Aerial Cable Construction Tool
Spicing Machines & Other Tools
Passive infrastructure of FTTH networks: an overviewLuc De Heyn
Presentation of the FTTH Council webinar on September 2014. A general introduction to FTTH passive infrastructure and a view on the latest trends.
Speaker: Raf Meersman, CEO of Comsof
More info on planning & design of FTTH infrastructure: http://www.fiberplanit.com
These are sample slides taken from my 4 days long "GPON-FTTx" training course. This course has over 380 slides and it is a great source of learning about various topics related to GPON & FTTx. There are tons of exercises and real-world examples provided in teaching material.
Presented by Mark Boxer & Jeff Bush of OFS
Agenda:
• Why Fiber?
• Fiber Feeds Everything
• Nuts and Bolts -The Components
• Installation Techniques
• Network Architectures and Planning
Zyxel’s Fiber Access solution provides versatile fiber connectivity for service providers according to the deployment requirements. Service providers can highly optimize and integrate various FTTx applications with the freedom to deploy services easily on GPON, GEPON, Active Fiber solutions with OLT, ONU/ONT and active fiber gateways.
Fibre optic FTTH FTTX network design, engineering and planning solutions,van den Dool Dick
Fibre optic FTTH FTTX network software solutions to design, engineer & plan FTTH / FTTX networks cost optimized automatically. Shows the required input, design phase and output to Autocad etc.
Real Fibre optic FTTH FTTX network design, engineering & planning software fo...van den Dool Dick
ITS-NetDesign™
Our Fibre optic FTTH / FTTX network design, engineering & planning software for Autocad® is an important member of our suite of software solutions & planning tools.
Simply: design, engineer & plan FTTH / FTTX optical fibre networks.
Advanced modelling of P2P & GPON networks.
Real network design & engineering software for Autocad®.
Faster and more flexible than any GIS.
Software details, engine, installation, usage, customization, examples, LISP programming
The AS-Built document of fiber optic project is very vital to the success of the project as it is one of the major document to be handed over to the Fiber maintenance team, hence the level of accuracy is expected to be higher than the proposed route drawing.
Real Fibre optic FTTH FTTX network design, engineering & planning software fo...van den Dool Dick
ITS-NetDesign™
Our Fibre optic FTTH / FTTX network design, engineering & planning software for Autocad® is an important member of our suite of software solutions & planning tools.
Simply: design, engineer & plan FTTH / FTTX optical fibre networks.
Advanced modelling of P2P & GPON networks.
Real network design & engineering software for Autocad®.
Faster and more flexible than any GIS.
Software details, engine, installation, usage, customization, examples, LISP programming
The AS-Built document of fiber optic project is very vital to the success of the project as it is one of the major document to be handed over to the Fiber maintenance team, hence the level of accuracy is expected to be higher than the proposed route drawing.
During past years Nestor Cables has morphed from a traditional cable manufacturer into a modern solution provider - nowadays we aim to deliver whole packages to serve as a complete solutions to our customers’ needs. Our solutions have been developed with decades of experience in cable technologies and in close cooperation with our customers. In this brochure we introduce six solutions: Fibre to the Antenna, Fibre to the Home, Fibre Optic Cables in Windmill Farms, Mobile Optical Cable Units, Nestor Cables Security System N-Sec and Microduct cabling solution.
Loose tube vs. tight-buffered fiber optic cableTeresa Huang
Selecting the right type of fiber optic cable boils down to the applications and the installation. This post will introduce and compare two fiber optic cable types based on different cable constructions—loose-tube and tight-buffered fiber optic cable.
Fiber optics and how optical communication takes place.Details regarding how signalling,routing and switching occurs in optical network .A little detail about various equipments used in optical communication.
10 STAGES OF FIBER OPTICS PROJECT IMPLEMENTATIONimtfiber
HOW TO CARRY OUT SUCCESSFUL FIBER OPTIC PROJECT STAGE BY STAGE. THE OUTSIDE PLANT PROJECT OF FIBER OPTICS CABLING TECHNIQUES WHICH INCLUDE PROJECT PLANNING TO PROJECT EXECUTION
We are providing FTTH (Fiber To The Home) using GPON technology based on customer requirements. In new projects, in order to attract more subscribers and satisfy their Ethernet+VoIP+CATV triple play service demand, fiber to the home network is the most suitable solution for cable operators GEPON system consists of an OLT (Optical Line Terminal) located in the operator's central office and an ONU (Optical Network Unit) located at customer premises for FTTH connections.
We are providing FTTH (Fiber To The Home) using GPON technology based on customer requirement. In new projects, in order to attract more subscribers and satisfy their Ethernet+VoIP+CATV triple play service demand, fiber to the home network is the most suitable solution for cable operators GEPON system consists of an OLT (Optical Line Terminal) located in the operators central office and an ONU (Optical Network Unit) located at customer premises for FTTH connections.
Presented at the Economic Development Conference in Ontario, CA, on October 25 2018, by John George.
Learn about FTTX, 5G, Rollable Ribbon, ADSS, Micro-cables, InvisiLight ® Solutions, and Slimbox® Solutions.
FTTH Network A Future-Proof Solution for Access Network ApplicationSun Telecom
Demand for high bandwidth services by end users continues to grow rapidly. To meet current and future demand for services, such as internet TV, 4K/8K video, online gaming, VR/AR, and IoT, operators are deploying FTTH (Fiber-to-the-Home) to the consumer’s home or business. It provides low latency, high reliability, and high-speed internet connections. This article provides some information about FTTH.
Fiber optics in-buildings infrastructure paper - OEA- LebanonKSU
This review paper discusses the benefits of fibre broadband and considerations for real estate developers in Lebanon; it compares different FTTx network architectures, the standardization of building network elements, the need for local legislations and describes typical FTTH deployments worldwide.
UCI EDGE project to address the large incumbent, Comcast, and their direction going forward to take advantage of disrupting technologies - mobile, FTTH, DOCSIS 3.1.
KEYNOTE PRESENTATION "WiFi -The Real 4G"
Brough Turner Founder -netBlazr.com
Wireless is at a tipping point and WiFi leads the way. LTE and WiMAX are relative laggards, as innovation shows up in WiFi first. This session will look at current WiFi deployments, current and future opportunities, and illustrate why we are the tipping point of Broadband Wireless.
FTTx FTTH EPON Triple-play Solutions
Ethernet + VoIP + CATV Total Solutions
SUN Telecom’s SUN-GE9100 series OLT featured with high reliability, flexible, easy maintain.
It can support 8 GEPON PON ports and connect 512 remote ONU mostly (by 1:64 splitter),
and provides 8 GE optical/electrical uplink interfaces. SUN-GE9100 OLT is an idea device applied
to FTTB/FTTP/FTTH access solutions.
Introduction to suburban broadband optionsGreg Whelan
Communities want broadband choices, people want high speed access at reasonable prices. This presentation, uses the historic seaport of Newburyport, Massachusetts to illustrate the likely options, challenges and issues facing communities across the nation.
As presented at the 4G Wireless Evolution conference in Miami, January 22, 2010.
WiFI has been at the heart of the change to OFDM and MIMO solutions. It is not suprising that WiFi is a hotbed of innovation in today’s marketplace. This discussion looks at the current and future opportunities associated with WIFI and the implications for new kinds of deployment and adaptation by the LTE and WiMAX community.
Unveiling the Secrets How Does Generative AI Work.pdfSam H
At its core, generative artificial intelligence relies on the concept of generative models, which serve as engines that churn out entirely new data resembling their training data. It is like a sculptor who has studied so many forms found in nature and then uses this knowledge to create sculptures from his imagination that have never been seen before anywhere else. If taken to cyberspace, gans work almost the same way.
Affordable Stationery Printing Services in Jaipur | Navpack n PrintNavpack & Print
Looking for professional printing services in Jaipur? Navpack n Print offers high-quality and affordable stationery printing for all your business needs. Stand out with custom stationery designs and fast turnaround times. Contact us today for a quote!
Discover the innovative and creative projects that highlight my journey throu...dylandmeas
Discover the innovative and creative projects that highlight my journey through Full Sail University. Below, you’ll find a collection of my work showcasing my skills and expertise in digital marketing, event planning, and media production.
As a business owner in Delaware, staying on top of your tax obligations is paramount, especially with the annual deadline for Delaware Franchise Tax looming on March 1. One such obligation is the annual Delaware Franchise Tax, which serves as a crucial requirement for maintaining your company’s legal standing within the state. While the prospect of handling tax matters may seem daunting, rest assured that the process can be straightforward with the right guidance. In this comprehensive guide, we’ll walk you through the steps of filing your Delaware Franchise Tax and provide insights to help you navigate the process effectively.
Skye Residences | Extended Stay Residences Near Toronto Airportmarketingjdass
Experience unparalleled EXTENDED STAY and comfort at Skye Residences located just minutes from Toronto Airport. Discover sophisticated accommodations tailored for discerning travelers.
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The world of search engine optimization (SEO) is buzzing with discussions after Google confirmed that around 2,500 leaked internal documents related to its Search feature are indeed authentic. The revelation has sparked significant concerns within the SEO community. The leaked documents were initially reported by SEO experts Rand Fishkin and Mike King, igniting widespread analysis and discourse. For More Info:- https://news.arihantwebtech.com/search-disrupted-googles-leaked-documents-rock-the-seo-world/
Explore our most comprehensive guide on lookback analysis at SafePaaS, covering access governance and how it can transform modern ERP audits. Browse now!
Attending a job Interview for B1 and B2 Englsih learnersErika906060
It is a sample of an interview for a business english class for pre-intermediate and intermediate english students with emphasis on the speking ability.
[Note: This is a partial preview. To download this presentation, visit:
https://www.oeconsulting.com.sg/training-presentations]
Sustainability has become an increasingly critical topic as the world recognizes the need to protect our planet and its resources for future generations. Sustainability means meeting our current needs without compromising the ability of future generations to meet theirs. It involves long-term planning and consideration of the consequences of our actions. The goal is to create strategies that ensure the long-term viability of People, Planet, and Profit.
Leading companies such as Nike, Toyota, and Siemens are prioritizing sustainable innovation in their business models, setting an example for others to follow. In this Sustainability training presentation, you will learn key concepts, principles, and practices of sustainability applicable across industries. This training aims to create awareness and educate employees, senior executives, consultants, and other key stakeholders, including investors, policymakers, and supply chain partners, on the importance and implementation of sustainability.
LEARNING OBJECTIVES
1. Develop a comprehensive understanding of the fundamental principles and concepts that form the foundation of sustainability within corporate environments.
2. Explore the sustainability implementation model, focusing on effective measures and reporting strategies to track and communicate sustainability efforts.
3. Identify and define best practices and critical success factors essential for achieving sustainability goals within organizations.
CONTENTS
1. Introduction and Key Concepts of Sustainability
2. Principles and Practices of Sustainability
3. Measures and Reporting in Sustainability
4. Sustainability Implementation & Best Practices
To download the complete presentation, visit: https://www.oeconsulting.com.sg/training-presentations
Enterprise Excellence is Inclusive Excellence.pdfKaiNexus
Enterprise excellence and inclusive excellence are closely linked, and real-world challenges have shown that both are essential to the success of any organization. To achieve enterprise excellence, organizations must focus on improving their operations and processes while creating an inclusive environment that engages everyone. In this interactive session, the facilitator will highlight commonly established business practices and how they limit our ability to engage everyone every day. More importantly, though, participants will likely gain increased awareness of what we can do differently to maximize enterprise excellence through deliberate inclusion.
What is Enterprise Excellence?
Enterprise Excellence is a holistic approach that's aimed at achieving world-class performance across all aspects of the organization.
What might I learn?
A way to engage all in creating Inclusive Excellence. Lessons from the US military and their parallels to the story of Harry Potter. How belt systems and CI teams can destroy inclusive practices. How leadership language invites people to the party. There are three things leaders can do to engage everyone every day: maximizing psychological safety to create environments where folks learn, contribute, and challenge the status quo.
Who might benefit? Anyone and everyone leading folks from the shop floor to top floor.
Dr. William Harvey is a seasoned Operations Leader with extensive experience in chemical processing, manufacturing, and operations management. At Michelman, he currently oversees multiple sites, leading teams in strategic planning and coaching/practicing continuous improvement. William is set to start his eighth year of teaching at the University of Cincinnati where he teaches marketing, finance, and management. William holds various certifications in change management, quality, leadership, operational excellence, team building, and DiSC, among others.
1. FTTH/FTTP/FTTC/FTTx
Current Status of Fiber To The User
Created By Jim Hayes, VDV Academy
For The Fiber Optic Association
Presented at The NECA Show, Boston, 2006
Fiber Optic
1
2. What is FTTx?
• FTTH: fiber to the home
• FTTP: fiber to the
premises
• FTTC: fiber to the curb
• FTTN: Fiber to the node
• FTTx: for those who can’t
decide what to call it or
are referring to all
varieties!
Fiber Optic
2
3. What is FTTx?
• Mostly a telco issue
– Telcos have many aging
cable plants
– CATV companies have
HFC networks in place
– Competitive carriers now
install own fiber
– Telcos fighting for
exclusive rights
Fiber Optic
3
4. Who Competes With Telcos
In Implementing FTTx?
•
•
•
•
•
Municipalities
Utilities
CLECs
Private companies
Battleground for telcos
and CATV companies
Fiber Optic
4
5. Where is the fiber?
• Where is the bulk of telephone cabling?
– 10% is long distance
– 10% is local loop (metropolitan)
– 80% is subscriber loop
• Long distance and local loop are
virtually all fiber
• Is FTTx just completing the system?
Fiber Optic
5
6. Why FTTx? Why Now?
• Telcos are suffering with aging copper
cable plants
• Telcos are losing broadband customers to
CATV and landline customers to cell
phones and VoIP
• New services are becoming available to
enhance revenue - and customers
demand them
• Regulations changed sharing issues
• New technology (PON) and cheaper
components makes FTTx cheaper
Fiber Optic
6
7. Why FTTx? Why Now?
• Many telcos are realizing that
the alternatives to FTTx are
inadequate for future bandwidth
needs:
– DSL won’t have the bandwidth
– Wireless won’t have the bandwidth
– BPL won’t have the bandwidth
• Eventually they will have to go
FTTx, so why put off the
inevitable?
Fiber Optic
7
8. Who Wants FTTx?
• Homeowners: for high speed Internet
access and video downloads
• Home Builders: FTTx adds value (and
profit) to their homes
• Hardware Providers
• Service Providers: IPTV, HDTV, video
on demand
Fiber Optic
8
9. FTTx is gaining momentum
• US: 6 million
homes passed
(Jan, ‘06)
• 1,000,000
connected
• Still a drop in the
bucket!
• Data from Render,
Vanderslice and
Associates, 2006
Fiber Optic
9
10. What’s In It For Contractors?
• Contractors are doing FTTx installs for
Verizon and others
• While few electrical contractors do
residential electrical, homes with
structured cabling offer double the work
and potential profit!
• FTTx will affect the commercial fiber
market - fiber is cheaper!
Fiber Optic
10
12. FTTx Architectures
• Home run - fiber from CO to every
home
• Active star - local switch then fiber to
every home
• Passive optical network (PON) - use
splitter near customer share fiber to CO
• WDM PON - PON but with each
customer having a specified wavelength
• All based on standard SM fiber
Fiber Optic
12
21. FTTx Is Driving
Residential Cabling
• Driven by FTTH, building
codes, customer demand
and builder profits
• More diverse than
commercial cabling
–
–
–
–
–
Internet
CATV coax
Home theater
Intercom
Security
• TIA 570A+
Fiber Optic
21
22. The FOA Supports FTTx
• New certification for
FTTx techs
• Training program
and reference
materials for FOAapproved schools
• Helping recruit FTTx
techs
Fiber Optic
22
23. For more information, contact:
The Fiber Optic Association, Inc.
1119 S Mission Road #355, Fallbrook, CA 92028
Tel: 1-760-451-3655 Fax: 1-781-207-2421
www.thefoa.org
info@ thefoa.org
Fiber Optic
23
Interestingly, this topic has many acronyms to define it:
FTTH: fiber to the home - bringing fiber all the way to the home of the subscriber
FTTP: fiber to the premises - samd thing, different term, also encompasses businesses
FTTC: fiber to the curb (with wire into the home)
FTTN: Fiber to the node (with wire into the home)
FTTx: to refer to all types or for those who can’t decide what to call it!
Fiber to the home or fiber to the premises are the same thing, although “premises” was probably chosen to indicate the user could be a business as well as a household.
Anyway, the idea is to bring fiber to the end user and offer high bandwidth services not available otherwise.
For the purposes of this presentation, we will use FTTH for FTTH or FTTP
FTTH is mostly a telco issue
Telcos have many aging cable plants that cannot support DSL but it is too expensive to replace old copper with new copper just for POTS (plain old telephone service.) However, the aging copper is expensive to maintain. Some analysts also claim that FTTH maintenance costs are so much lower than keeping the current copper network going provides up to 2/3 of the financial benefits of FTTH - much greater than the revenue enhancements!
CATV companies have HFC networks in place and have the ability to bring gigabit signals to the home, although some are looking at replacing the coax drop to the home with fiber.
Competitive carriers now install their own fiber since FCC rules have changed and they cannot be assured of access to competitive carriers cable plants.
Telcos are fighting for exclusive rights where others, such as municipalities or utilities are trying to install FTTH, even if the telcos are not immediately planning on running FTTH themselves.
Besides the telcos, several other groups are attempting to install FTTH.
Municipalities: Some of the first FTTH systems were installed by cities - progressive ones like Palo Alto did it at the request of their high-tech citizens, some did it to entice businesses to move there, like Anaheim, some did it (or are trying to) because they were not pleased with the service of telcos or CATV companies. The latter often found the telcos or CATV companies to be formidable opponents who did not always play fair! Most municipal FTTx projects use rights of way available to the city through city-owned utilities.
Utilities: Owning rights of way to the home convinced some utilities to try FTTH or FTTC. Ethernet over power lines is becoming a option for power companies who can use power lines for the final connection to the home. FTTx is even becoming real for rural customers through rural electrical cooperatives.
CLECs (Competitive Local Exchange Carriers) install their own networks and can then sell connections to anyone they pass, but mostly focus on businesses which spend much more money on communications than households.
Private companies: There are private companies that will build municipal FTTH networks under an agreement with the city, similar to CATV agreements. In addition, some contractors building large subdivisions or apartments are installing FTTH with the assumption that they can connect with telecommunications companies for services to resell.
FTTH is a considered a battleground by telcos and CATV companies: Whenever a city or private company proposes to install FTTH, they can expect to have to deal with the legal, advertising and technical staff of the current telco or CATV company. Cities have found themselves in court or in battles where they are outspent by 100 to 1 in advertising in an attempt by the local telcos and CATV companies to defeat competitive systems.
Photo: James Hettrick, Loma Linda, CA, which runs its own FTTH network.
Where is the bulk of telephone cabling? It may not be where you think!
Only 10% is in long distance networks, which were the first links converted to fiber - years ago.
Another 10% is local loop (metropolitan) connecting central offices and switches - now mostly converted to fiber too.
Fully 80% of all telco cabling is subscriber loop - the “last mile” that connects the end user to the system.
After 20 years of fiber optic installations, virtually all long distance and local loop connections are already fiber. Only the “last mile” is still copper, and much of it is very old and incapable of carrying modern high bandwidth digital signals.
Is FTTH just completing the system to make it all fiber?
We recognize five changes in the current telco environment that are affecting attitudes toward FTTH:
Telcos are losing broadband customers to CATV
Telcos are losing landline customers to cell phones and VoIP
New services are becoming available
Fiber optic components are getting less expensive
Regulations changed sharing issues
New Technology makes FTTH cheaper - comparable in cost to copper solutions, lower in cost per bandwidth and with lower operating expenses.
We’ll look at each of these in more detail. Read on…
Many telcos are realizing that the alternatives to FTTH are inadequate for future bandwidth needs:
DSL won’t have the bandwidth over most installed copper
Wireless won’t have the bandwidth, and the spectrum may not be affordable
BPL (broadband over power lines) won’t have the bandwidth
If the alternatives do not offer the bandwidth, they cannot be cost effective.
Many are realizing that eventually they will have to go FTTH, so why put off the inevitable?
In California, AAA advertises “Someday, you’ll break down and join AAA.” Maybe that should be adapted to be the motto of FTTH!
Who Wants FTTx?
Homeowners: for high speed Internet access and video downloads
Home Builders
FTTx adds value to their homes
FTTx provides a reason to provide structured cabling inside the home
These two reasons can add $7,500 to $15,000 to the value of a home!
Hardware Providers who want to sell equipment to build the networks and install in the homes as well as structured cabling companies who participate in a market that is about $2500 per home!
Service Providers: IPTV, HDTV, video on demand, etc. Those who want to offer video services are most happy with FTTx as nothing provides the same bandwidth!
FTTH is gaining momentum
RVA estimates that one million homes were connected with fiber, as of September, 2006 of 6 million homes passed, still a very small number compared to the 100 million or so subscriber lines. Verizon estimates 5,000,000 new FTTH connections for the year.
It should be noted that the US is not a leader in FTTx deployments. Approximately 80% of all worldwide FTTx connections are in Japan as of mid-2006 and China and Korea are actively developing FTTx programs. Europe, where DSL works over most of their short urban lines, is not aggressively pursuing FTTx.
However the pace is increasing, with operating companies hiring personnel for FTTx installations at a growing rate, indicating a strong commitment to FTTx.
What’s In It ForContractors?
Contractors are doing FTTx installs for Verizon and others in many parts of the country.
While few electrical contractors do residential electrical, homes with structured cabling offer double the work and potential profit! There is about $2500 in structured cabling in a new home in CA. Contractors can increase their revenue by doing hardware installs too.
FTTx will affect the commercial fiber market - fiber is cheaper! Bosses being asked for budget for an upgrade to expensive new copper cabling will wonder why they are installing more copper when the phone companies are using fiber!
One estimate by Optical Solutions shows this breakdown on the cost of a FTTH network. Cost decisions are interactive. For example, one wonders if the splitters and WDMs are worth the savings in fiber, but adding more fiber would increase installation and thereby construction costs, so it is assumed that they do indeed save costs. Once cannot overemphasize the importance of labor costs - it is the dominant factor - and anything that reduces labor, like preterminated cabling, deserves consideration.
FTTH Architectures
Home run - fiber from CO to every home, offers the most flexibility but at the highest cost as no electronics are shared. A good solution for small developments or rural connections.
Active star - local switch then fiber to every home, highly flexible, but simply moves the electronics closer to the home, saving only a small amount in cabling costs. Think of it as fiber to the curb with the curb to home on fiber too.
Passive optical network (PON) - use splitter near customer share fiber to CO. Not only does it share fiber, it shares electronics, using one transmitter at the CO for up to 32 homes, greatly reducing connection costs. Basic PON architectures are widely used because they are usually the least expensive way of implementing FTTH.
WDM PON - PON but with each customer or location having a specified wavelength. Again highly flexible, but more expensive and harder to manage.
All FTTH networks are based on standard SM fiber(ITU G.652), also called dispersion unshifted or non-dispersion shifted fiber. The only fiber option normally considered is to use low-water vapor fiber that removes the water peak at 1400 nm.
A home run architecture uses a direct fiber run from the CO to the customer. Each is a full duplex optical link, making this generally more expensive from the standpoint of fiber and electronics requirements. It is used in some small systems, like gated communities, sometimes with 2 fibers, one digital for Internet and VoIP, the other for analog CATV.
Some people refer to this as a P2P or point-to-point network.
An active star network uses fiber from the central node (CO) to a local active node carrying multiplexed signals to be distributed to all the customers. At the active node, (electronic) switching occurs for each customer and connects to a dedicated optical link to the premises. This may be a more expensive network due to the electronics and powering required, as the node requires uninterruptible local power if support of services like 911 are required, or cheaper for small networks that do not need the size or capability of a PON network. Each system needs to be considered carefully in light of all options.
The passive optical network (PON) uses optical couplers, both wavelength division multiplexers and simpler splitter/combiners, to allow connection of many customers over only one fiber from the CO - like broadcasting TV or radio over air waves. Thus a few fibers can support many customers, typically up to 32 customers on one fiber from the CO to the local splitter.
A PON using wavelength division multiplexing (WDM) can be used two ways: It can provide every customer with a dedicated wavelength, greatly expanding bandwidth to any one customer, but a a much greater cost.
A more popular option is to use WDM to send multiple services, usually voice data and video, as well as upstream signals, over a single fiber, as shown in the slides following.
Upstream data from multiple subscribers is time-division multiplexed so each subscriber has a time window to send data back to the system.
Some people refer to this as a P2MP or point-to-multipoint network.
An alternative to FTTH/P is “fiber to the curb.” FTTC brings fiber to the neighborhood and installs a local switch usually in or near a current pedestal. The fiber replaces the copper from the pedestal to the CO, using only the short copper run from the pedestal to the customer premises to make the final connection. Using DSL over these short lengths of copper allows higher bandwidth than a direct CO connection, allowing more flexibility in services offered. A new Ethernet standard for Ethernet in the first mile (802.3ah) is possible for use here with higher capability than current DSL. In addition, if sufficient fibers are installed from the CO to the pedestal at the time of a FTTC upgrade, the system can be converted to a FTTH PON system at a later date by running drop cables to each customer.
Equipment is available for this system that places a local switch near a previous pedestal that is only a copper connection point. A new fiber is brought to the pedestal and the CO to pedestal connection is moved to fiber. The subscriber is then connected to the new fiber switch. In some systems, the power for the fiber switch is sent from the CO over the old copper phone cable.
Here is the architecture being used by Verizon for triple play services.
First the acronyms:
EDFA = erbium doped fiber amplifier
WDM = wavelength division multiplexing
FDF = fiber distribution frame
FDH = fiber distribution hub
ONT = optical network terminal
OLT = optical line terminal
The concept is to use WDM ( wavelength division multiplexing) to send bi-directional signals at different wavelengths on only one fiber. Current systems use:
1490 nm for TDM (time division multiplexed) digital voice and data from the CO to the home
1310 nm for TDM (time division multiplexed) digital voice and data from the home to the CO
1550 nm for analog video to the home
Downstream, each home has a digital address and only receives information specifically addressed to it. Upstream, it has a TDM time slot for sending data back to the system. This ensures each home receives only the data specific for its usage.
Signals are distributed to a neighborhood on one fiber, then split with a passive coupler in the FDH to individual fibers going to each house.
If sufficient fibers are already in place, the video can be sent on a separate fiber, so each home is connected with two fibers. While this means WDM is not needed, a second set of splitters is needed in addition to the additional fibers.
Supposedly Verizon, AT&T (SBC and Bellsouth) have agreed to make this single fiber version a standard architecture.
FDH - fiber distribution hub in a pedestal
PON networks have some unique needs for components, like this FDH - fiber distribution hub. Here a pedestal has inputs and outputs for feeder and distribution cables, shelves for splitters and a patch panel to allow flexibility in terminations. In ways, it is like a passive copper pedestal, as PONs do not require power in the pedestal.
Splice Closures
FTTx applications often need special splice closures, for example to allow a distribution cable to split out fibers for individual homes and continue to another drop point.
In this splice closure end-cap, each port can accommodate a feeder cable in and out, plus three ports for numerous drop cables. Also each port can be accessed without disturbing previously installed cables.
The closure on the right allows for four weatherproof connections to preterminated drop cables using weatherized fiber optic connectors. Some FTTH installations are using preterminated cable assemblies with closures such as this instead of field termination or splicing, with claims that it saves time and may be more cost effective. As we said earlier, each network needs an individual analysis to determine the most cost-effective solution.
ONT - Optical Network Terminal
Optical network terminals generally mount on the outside of the customer premises and provide voice, data and video feed to the home. Larger units are used for businesses and apartments. Sometimes, ONTs are installed indoors and some look similar to a cable modem or router.
ONTs can be connected to the network by splicing or connectors, but connectors are generally favored for their simplification of testing and troubleshooting. Connectors may be spliced on drop cables or prepolished/splice connectors can be used on the cables. Many vendors are developing preterminated cable assemblies with weatherproof connectors as the simplified installation can save costs over field termination.
ONTs contain transmitters and receivers for the optical fiber connections and electronics to drive phone, Internet and TV connections in the home. Thus each ONT needs powering at the home. Powering ONTs is an issue, since customers expect phone service to not be interrupted by power outages, a consequence of over a century of phones being powered from the central office. Now most ONTs are powered from the customer’s AC power and include an uninterruptible power supply to maintain service during power outages.