MP-4100M-OP-108/ETH/SFP10B

4-Channel E1 and Ethernet multiplexer module for MP-4100, Ethernet port, pluggable transceiver: Fast Ethernet/STM-1, Tx – 1550 nm, Rx – 1310 nm, single mode (single fiber), laser (WDM) , 20 km (12.4 mi)