Cisco GLC-LH-SMD, Interfaces/Ports 1 x LC/PC Duplex 1000Base-LX/LH Network, Gigabit Ethernet, Data Transfer 1 Gbps, Optical Fiber, Network 1000Base-LX/LH, Hot-swappable, Application/Usage Data Networking, Optical Network. The industry-standard Cisco Small Form-Factor Pluggable (SFP) Gigabit Interface Converter is a hot-swappable input/output device that plugs into a Gigabit Ethernet port or slot, linking the port with the network.