SFP1000TXST Compatible RJ45 Transceiver Module, Full Duplex. The SFP1000TXST is a copper SFP transceiver that’s designed, programmed and tested to work with 1000BASE-TX compatible MSA switches and routers. The SFP transceiver module supports a maximum distance of up to 100 m (328 ft) and delivers dependable 1 GbE connectivity over copper cabling.