The small form-factor pluggable (SFP) is a compact, hot-pluggable transceiver used for both telecommunication and data communications applications. sfp transceiver can be regarded as the upgrade version GBIC, unlike GBIC with SC fiber optic interfaces is with LC interface and the main body size of SFP is only about half of GBIC, which makes SFP space saving, and it interfaces a network device mother board (for a router, switch, media converter or similar device) to a fiber optic or copper networking cable. It is a popular industry format supported by many network component vendors. SFP transceivers module are designed to support SONET, Gigabit Ethernet, Fibre Channel, and other communications standards.
GBIC is short for gigabit interface converter, it is a input/output transceiver used with one end to plug into a gigabit Ethernet port such as on the switches, the other end of the transceiver is to connect the fiber optic patch cords and link the fiber optic networks, thus gbic transceiver function is to transform the signals between the Ethernet network and fiber optic network. GBIC classification is based on its working wavelength, data transmitting rate, working power, and the working distance. Generally GBIC fiber optic end the interface is SC type, the laser unit in GBIC module can be 850nm VCSEL, 1310nm FP, 1310nm DFB, and 1550nm DFB.
The enhanced small form-factor pluggable (SFP+) is an enhanced version of the SFP, in that it supports data rates up to 10 Gbit/s. The SFP+ was first published on May 9, 2006, and version 4.1 published on July 6, 2009. sfp plus transceiver supports 8 Gbit/s Fibre Channel, 10 Gigabit Ethernet and Optical Transport Network standard OTU2. It is a popular industry format supported by many network component vendors.
XFP modules are hot-swappable and protocol-independent. They typically operate at optical wavelengths (colors) of 850 nm, 1310 nm or 1550 nm. Principal applications include 10 Gigabit Ethernet, 10 Gbit/s Fibre Channel, Synchronous optical networking (SONET) at OC-192 rates, Synchronous optical networking STM-64, 10 Gbit/s Optical Transport Network (OTN) OTU-2, and parallel optics links. xfp transceiver can operate over a single wavelength or use dense wavelength-division multiplexing techniques. They include digital diagnostics that provide management that were added to the SFF-8472 standard. XFP modules use an LC fiber connector type to achieve high density.
A XENPAK is a 10G optical fiber transceiver which supports a variety of physical interfaces, including single mode fiber, multi mode fiber and CX4 Infiniband copper cables. The XENPAK standard is defined in the Multisource Agreement (MSA), which defines a fiber optic or copper transceiver module conforming to the IEEE 802.3ae 10GbE (10 Gigabit Ethernet) standard.
XENPAK transmission distances range from 100 metres to 80 kilometres for fiber. xenpak transceiver support transmission distances of up to 15 metres on CX4 cable. Recently introduced XENPAK transceivers supporting the 10GBase-LX4 standard utilize multiple wavelengths on legacy multi mode fiber at distances of up to 300 metres. This can eliminate the need to install new cabling in a building or facility when upgrading certain 1 Gbit/s circuits to 10 Gbit/s.