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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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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!
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
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
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