Cisco SFP-LH is a type of Small Form-Factor Pluggable (SFP) transceiver module designed for use in Gigabit Ethernet and Fibre Channel applications. It is a hot-swappable device that plugs into a Gigabit Ethernet port or slot of a switch or router and supports data rates of up to 1.25 Gbps. It is compatible with both single-mode and multi-mode fiber cables and is designed to provide a cost-effective solution for short-distance data transmission. The SFP-LH is also backward compatible with existing SFP transceivers, allowing for easy integration into existing networks. It is an ideal solution for connecting two switches or routers in a short-distance network.