The SGMII 10/100/1000BASE-T Copper Gigabit Ethernet Small Form-factor Pluggable (SFP) Transceiver 100M 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# GLCSG-T(10/100/1000))