Overview Small Form-factor Pluggable (SFP) modules are compact optical transceivers used in optical communications which provide the same functionality as a regular GBIC, but in a much smaller and denser physical size. SFP modules are used in variety of optical transport equipments (e.g. switches, routers) for their extremely small size and flexibly hot-swappable characteristic, enabling a fast and convenient installation. Highlighted for the confirmation to standardized physical and electrical characteristics, the deployment of SFP modules makes carriers' inventory investment much smaller for there is no vendor limitation. Eltech provides various types of SFP modules for different applications, including CWDM wavelength specific SFP which can directly connect with CWDM transmission system and normally used SFP which can work with other vendors' equipments. All Eltech SFP modules comply with Multi-Source Agreement (MSA), enabling the compatibility with other vendors' equipments (e.g. Cisco, HP, Nortel switches, routers or optical transport devices).