Cisco® SFP-10G-BX40U-I Compatible 10GBase-BX SFP+ Transceiver (SMF, 1270nmTx/1330nmRx, 40km, LC, DOM). A 100% Cisco® compatible SFP+ transceiver that operates at 1270nmTx/1330nmRx over single-mode fiber, with a maximum reach of 40km connected via a LC connector. This Cisco® SFP+ transceiver is 100% compliant with its designed networking application, and is factory programed with Cisco® specific configuration data required for seamless networking integration. This SFP+ transceiver will initialize and perform identically to Cisco's transceiver and is built to meet or exceed Cisco'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.