1.Nortel Compatible SFP 2.Gigabit Ethernet 3.Fiber Channel 4.AA1419037 5.SFP Transceiver Optical Transceiver ... Modules, pls check my opinion as following:1,It had 100% increasing both 2008 and 2009,2010, it has good demand ... very lowest than original SFP modules.3,Our SFP modules 100% compatible with allmost switches like Cisco,HP,3COM,Nortel,Alcatel ...