The Transition Networks small form factor pluggable (SFP) transceiver modules are designed to install in any SFP port allowing for 1000Base-T, 1000Base-SX or 1000Base-LX interfaces to the network through the SFP connector. The transceivers are Cisco compatible and are designed for bidirectional serial-optical data communication such as Gigabit Ethernet or fiber channel at speeds up to 1.25 Gbps. TN-GLC-LH-SM