Cisco SFP 1.25G market is used more

Also there are other Compatibale brands (like Cisco, Huawei and so on) provides Cisco SFP 1.25G. Cisco compatible 1.25G SFP like GLC-SX-MM, GLC-LH-SM, GLC-EX-SMD are also avalible at Ingellen. GLC-SX-MM is 1000Base-SX SFP fiber optic transceiver for multimode fiber and it works at 850nm wavelength. It fits for Gigabit Ethernet port or slot and link the port with the network. The GLC-LH-SM trancevier supportis dual data-rate of Cisco SFP 1.25G and 20km transmission distance with SMF. The GLC-EX-SMD trancevier is high performance, cost effective modules supporting dual data-rate of 1.25G/1.0625G and 40km transmission distance with SMF. They are all fully compatible with SFP Multi-Source Agreement(MSA).

Cisco SFP 1.25G Modules - hot-pluggable module, the greatest rate as high as 10G, multi-use LC interfaces. SFP(small form pluggable) can easily be understood since the upgrade version of GBIC. SFP module volume ratio reduced by half than GBIC module, the identical panel can be configured in more than double of ports. Other features of SFP Module are do i think the GBIC basicly . Things like Cisco SFP Modules(cisco mini gbic) are usually smaller and therefore are just about half the dimensions of GBIC optics. These modules send speeds that vary from 100Mbps to about 4+Gbps. Their transmission length begins at approximately 500 meters and goes up to 120+ kilometers.