... fiber optic modem FE1, V.35 PDH, fiber mux, fom, fiber multiplexer, optical multiplexer fiber converter, media converter Fiber Optic ModemOP-FE1 Fiber ... Modem Modulate 1 E1 signal to single or multi mode fiber ... and salve clocks optional(3)Fiber interfaceInterface: FC/SCWavelenth: 850nm ...