... promise all the advertised optical transceivers are brand new with new components and parts and absolutely ... . What we supplyWe supply all kinds of compatible optical transceiver modules, including SFP, GBIC, SFP+, XENPAK, X2 , XFP, BIDI,CWDM ... transceiver modules. Our products are compatible with Cisco, 3COM, H3C, HP, Extreme, Foundry, Avaya, D-link, Alcatel, Riverstone, Enterasys, Netgear, Nortel ...