1000BASE SM (Single-Mode) SFP 1310nm / 12.4 miles (20km) Transceiver Module: CommFront offers a range of high-quality, high-performance SFP transceivers ranging from MM 850nm / 0.3 miles (550m) to SM 1550nm / 100 miles (160km). SFP (Small Form-Factor Pluggable) is a compact, hot-pluggable network interface module used for data communication and tele-communication applications. SFP equips with one or two fiber optic connectors (e.g. LC connectors) for connecting a fiber optic cable or sometimes an RJ45 connector for connecting a copper cable. Because of its compact size and flexibility, many Ethernet Switches come with SFP ports so individual ports can be equipped with any suitable type of transceiver as required.