WTD RTXM139-412 155M-2KM-1310NM-MM-ESFP-I Duplex LC 1W SFP Transceiver ModuleRTXM139-412 155M SFP transceiver modules are designed for use in 155M SDH links on up to 2km of Multimode fiber. They are compliant with the SFP MSA.The optical transceiver ..