Feeder Network (FTTH)
The feeder network is the high-fibre-count part of an access network that runs from the exchange to the fibre distribution terminals.
What is the feeder network?
Feeder cables start at the ODF in the central office and end at the FDTs, where the first-level splitters usually sit. They can be laid point-to-point to each FDT. Many operators instead use a protected ring that links several FDTs and returns to the exchange, so that a single cable cut does not cut off customers. This is known as type B protection in GPON.
How it works
Feeder cables enter the exchange in one of two ways. Fibre can be blown through fire-retardant conduit and micro-ducts from the first manhole straight to the ODF, or a fire-retardant indoor cable can be run from the ODF out to a first splice point in a nearby manhole.