The SGMII 1000 to 100M Gigabit Ethernet Small Form-factor Pluggable (SFP) Transceiver 10KM is a hot-swappable input/output device that plugs into a Gigabit Ethernet port or slot, linking the port with the network. The SFP provides full-duplex Gigabit Ethernet connectivity over existing copper network infrastructure. (Cisco part# GLC-GE-100FX)