Finisar® FTLF1721P1BCL compatible 1000Base-LX SFP transceiver (SMF, 1310nm, 40km, LC). An Finisar® SFP transceiver that operates at 1310nm over single-mode fiber, with a maximum reach of 40km connected via a LC connector. This Finisar® compatible SFP transceiver has been programmed, uniquely serialized, and data-traffic and application tested to ensure it is 100% compliant and functional. Our SFP transceiver will initialize and perform identically to Finisar's transceiver and is built to meet or exceed Finisar's specifications, and comply with MSA (Multi-Source Agreement) standards. The actual part shipped may have a different part number, but will be functionally identical and 100% compatible. Trade Agreements Act (TAA) versions of this part are available.