These modules send speeds Cisco SFP 1.25G and router

The following recommend SFP and all Compatible for Cisco swith and router. The following recommend all Compatible for Cisco swith and router. And the  SFP module are from 1000Base to 4Gbase. The SFP all are 2.5G.Price is different according the size of capacity. Cisco DS-CWDM4G1590 4G CWDM SFP Transceiver Cisco SFP 1.25G Transceiver Module Cisco CWDM-SFP-1430 1000Base-CWDM SFP Transceiver Cisco 2.5G Transceiver Module Cisco 2.5GTransceiver Module Cisco CH36 Compatible Transceiver ModuleThe following recommend  all Compatible for Cisco swith and router.

 And the SFP module are from 1000Base to 4Gbase. The  are 2.5G.Price is different according the size of capacity. Cisco SFP Transceiver Module Cisco SFP 1.25G  hot-pluggable module, the greatest rate up to 10G, multi-use LC interfaces. SFP(small form pluggable) can be understood since the upgrade version of GBIC. SFP module volume ratio reduced by half than GBIC module, the identical panel could be configured in additional than double of ports Other functions of Cisco SFP 1.25G are do i think the GBIC basicly . Items like Cisco SFP Modules(cisco mini gbic) tend to be smaller and so are just about half the dimensions of GBIC optics. These modules send speeds that range between 100Mbps to about 4+Gbps. Their transmission length begins at pproximately 500 meters and goes up to 120+ kilometers.