FP100BLXST Compatible LC Single Mode Transceiver Module, Half/Full Duplex. The SFP100BLXST is a fiber SFP transceiver that’s designed, programmed and tested to work with 100BASE-LX compatible MSA switches and routers. The SFP transceiver module supports a maximum distance of up to 10 km (6.2 mi) and delivers dependable 100 Mb Ethernet connectivity over fiber cabling.