XBR-000139-PCW is a 1000BASE-SX 1/2/4gb/s Data Rate SFP Transceiver Transceiver, generic for Brocade XBR-000139. It is guaranteed compatible for all Brocade switch and router product lines. This transceiver can be mixed and deployed with Brocade OEM transceivers for seamless network performance and interoperability. PCW Memory offers a LIFETIME advance replacement warranty on all transceivers (compared to 90 days from most OEM manufacturers).