SFP28-DW25G31-40C 25G SFP28 DWDM C31 100GHz ER 40KM 1552.52nm LC SMF DDM Transceiver Module
SFP28-DW25G31-40C 25G DWDM SFP28 ER Transceiver supports data rate of 25.78Gbps and up to 40km transmission distance over SMF using a wave length of 1552.52nm.

