The FG-FOM4/Eth-SR from FlexDSL Telecommunications AG is a small but powerful TDM and Ethernet convergence multiplexer for fiber lines. It was designed as a card for all available FlexDSL racks like FG-R-W, UTT1 and UTT4 and can coexists with other FlexDSL devices like Orion3 in them.
The FG-FOM4/Eth-SR transmits 4xE1 and can be upgraded to 8xE1 model by optional daughter board. The Ethernet interface and SFP jack for fiber transceiver are always available. User can select SFP module for 20, 40, 80 or even 120 km as well as bidirectional transceiver according to the application.