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High Level Telecom Architecture

Fiber To The Home (FTTH) Shared fiber Optical Network Terminal (ONT) converts light to analog voice and Ethernet data Consumer responsible for battery What if consumers don’t want fiber? . ONT. Shared Fiber. Gateway. OLT. Passive Optical Splitter. ONT. Battery. Home Run Copper. SAI.

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High Level Telecom Architecture

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  1. Fiber To The Home (FTTH) • Shared fiber • Optical Network Terminal (ONT) converts light to analog voice and Ethernet data • Consumer responsible for battery • What if consumers don’t want fiber? ONT Shared Fiber Gateway OLT Passive Optical Splitter ONT Battery Home Run Copper SAI • Digital Loop Carrier (DLC) • Housed in Remote Terminal (RT) outside plant cabinets • AC power with battery backup & generator hook-up DS1 RT Site SONET DLC SAI DS1 MUX MUX DS1 DS1 R R R Batteries Home Run Copper High Level Telecom Architecture Central Office MDF Class 5 Switch • Central Office (CO) • “home run” copper connects customers directly to CO • No Batteries in outside plant … phone “just works” SAI Home Run Copper Batteries & Generators Lots of great copper … it must be protected!

  2. Batteries Outside Plant Cable Topology - DLC F2 Aerial Cable Remote Terminal SAI/FDI F1/F2 x-connect Drop to House DLC F2 Buried Cable Feeder (F1 Cable) F1 Cable to CO is being retired as we speak From Central Office Losing Feeder cable to SAI cuts-off direct access to customers from Central Office

  3. Copper and Fiber Must Both be Maintained as part of “One Network” F1/F2 x-connect Passive Fiber Splitter When this copper is retired, it is essentially gone Outside Plant Cable Topology - FTTH F2 Aerial Cable SAI/FDI Drop to House (aerial or buried) To Central Office Feeder (F1 Cable) Bandwidth is good … but allowing this copper to disappear is wrong and dangerous

  4. Key Take Aways • Fiber and Copper together provide best of all worlds • Bandwidth • Ubiquity • Reliability • All maintenance systems must be kept in operation • All “one network” with different last mile technologies • “Feeder” copper is already being retired • What is going to happen to your feeder and drop with FTTH? • Already being removed for “aesthetic” reasons! Provision of Broadband must not negate National Security and Emergency Preparedness

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