SFP1000LXST Compatible LC Single Mode Transceiver Module, Full Duplex. The SFP1000LXST is a fiber SFP transceiver that’s designed, programmed and tested to work with 1000BASE-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 1 GbE connectivity over fiber cabling.