The Cisco 1000BASE-LX/LH-SMD= SFP module is an industry-standard Small Form-Factor Pluggable (SFP) Gigabit Interface Converter that links switches and routers to the network. Featuring a robust design for enhanced reliability, this SFP receiver/transmitter module plugs into a Gigabit Ethernet port or slot and is hot-swappable to maximize uptime and simplify serviceability.