which include SFP 1.25Gb/s cost effective

SFP 1.25Gb/s can be regarded as the upgrade version GBIC. Unlike GBIC with SC fiber optic interfaces, cisco SFP is with LC interface. Moreover, its main body size of SFP is only about half of GBIC, which makes SFP space saving. Cisco pluggable transceivers offer a convenient and cost effective solution for the adoption in data centers, campuses, metropolitan area access and ring networks, and storage area networks. Users can replace a single SFP module during the process instead of replace the whole board with many modules on it. Cisco Transceiver Modules support Ethernet, Sonet/SDH and Fibre Channel applications across all Cisco switching and routing platforms. The Cisco SFP transceiver is defined by a multi source agreement between some manufacturers in the industry. Cisco SFP fiber optic transceivers, which include SFP 1.25Gb/s,  Cisco DWDM SFP, Cisco Copper SFP and Cisco Bidi SFP. Cisco GLC T SFP transceiver is a hot pluggable module use RJ45 interface, it is compliant to IEEE 802.3 and its dimension is is with plug in module type Mini-GBIC. GLC T is 1000Base SFP fiber optic transceiver module via Category 5 copper line,