The Fiberinthebox GBIC solution is a convenient and cost-effective solution for the adoption of Gigabit Ethernet in data-center, and metropolitan-area access networks, with maximum optical budget 41dB. CWDM GBIC Transceivers are compliant with the ITU-T G.694.2 standard defined CWDM grid. It can be used with Fiberinthebox passive MUX/DEMUX, operator get 18 CWDM channel in 2 fibers link, and 9 CWDM channels in 1 fiber link. Our 1.25G CWDM GBIC can support transmission distance up to 120km.