TN-CWDM-SFP-1550 SFP Transceiver is small form factor pluggable (SFP) transceiver module designed to install in any SFP port, allowing 1000Base-LX interfaces to the network through the SFP connector. This transceiver have been designed for bi-directional serial-optical data communications such as Gigabit Ethernet or fiber channel at speeds up to 2.125 Gbps.