88Y6842-PCW is a 1000BASE-LH SFP Transceiver, generic for IBM 88Y6842. It is guaranteed compatible for all IBM switch and router product lines. This transceiver can be mixed and deployed with IBM OEM transceivers for seamless network performance and interoperability. PC Wholesale offers a LIFETIME advance replacement warranty on all transceivers (compared to 90 days from most OEM manufacturers).