We are the leading experts for GBIC, SFP (miniGBIC), XENPAK, X2 and CWDM modules and memory for all manufacturers.Test us! Tecowin provides SFP modules for all major manufacturers. We offer original, OEM and compatible (3rd party) products for: Cisco, HP, Extreme, Huawei, 3COM, Alcatel, Nortel, Foundy, Netgear, Brocade, Qlogic and many others. Tecowin is a leading wholesaler for new and refurbished (pre-owned) hardware for networking and VoIP. Please inquire about our terms for Cisco routers and switches.