HP速 JD121A compatible 10GBase-ER XFP transceiver (SMF, 1550nm (1,550 Nm = 1,143 ft-lb), 40km (40 km = 24.9 mi), LC). A 100% HP速 compatible XFP transceiver that operates at 1550nm (1,550 Nm = 1,143 ft-lb) over single-mode fiber, with a maximum reach of 40km (40 km = 24.9 mi) connected via a LC connector. This HP速 XFP transceiver is 100% compliant with its designed networking application, and is factory programmed with HP速 specific configuration data required for seamless networking integration. This XFP transceiver will initialize and perform identically to HP's transceiver and is built to meet or exceed HP'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.