The smallform-factor pluggable (SFP) is a compact optical transceiver used in optical communications for both telecommunication and data communications applications. It is a popular industry format supported by several fiber optic component vendors. SFP transceivers are designed to support SONET/SDH, Gigabit Ethernet, Fibre Channel, Optical Supervisory Channel OSC SFP and other communications standards

SFP transceivers are available with a variety of different transmitter and receiver types, allowing users to select the appropriate transceiver for each link to provide the required optical reach over the available optical fiber type (e.g. multi-mode fiber or single-mode fiber). Optical SFP modules are commonly available in four different categories: 850 nm (SX), 1310 nm (LX), 1550 nm (ZX), and DWDM/CWDM.
SFP transceivers are commercially available with capability for datarates up to 4.25 Gbit/s, SFP+ up to 8G/10G.

SFP MSA Transceiver Multisource Agreement