The XFP (10 Gigabit Small Form Factor Pluggable) is a standard for modules for high-speed network and telecommunication links that use optical fiber. XFP modules are hot-swappable, protocol-independent and they typically operate at near-infrared wavelengths (colors) of 850nm, 1310nm or 1550nm. Also, XFP transceivers can operate over a single wavelength or use dense wavelength-division multiplexing techniques. Principal applications of XFP modules include SONET OC-192, SDH STM-64, 10 Gbit/s Optical Transport Network (OTN) OTU-2, and parallel optics links.
The SFP+ (Enhanced Small Form-factor Pluggable) is an enhanced version of the SFP that supports data rates up to 16 Gbit/s. 10G SFP+ modules can be applied for SONET OC-192, SDH STM-64, OTN G.709, CPRI wireless, 16G Fibre Channel, and the emerging 32G Fibre Channel application.