Fiber Driver^® EM316EFx1RM modules from MRV Communications extend the distance and functionality of optical Ethernet networks while optimizing the use of existing fiber optic plant. Using advanced Time Division Multiplexing (TDM) technology, they combine and simultaneously transmit a 10/100 Mbps Ethernet data channel with either an E1 (EM316EFE1RM-5/ EM316EFE1RMRJ-5) or T1 (EM316EFT1RM-5) channel across a full-duplex fiber optic trunk to distances only limited by the trunk interface used. The modules are transparent to framing format, and they support HDB3 and AMI line codes.