SFP: is the interface device that converts gigabit electrical signals into optical signals.
Designed for hot swap. Is an interchangeable product that conforms to international standards. Gigabit switch with GBIC interface design because of the exchange of flexible, Video SFP in the market occupies a larger market share. SFP (Small Form-factor Pluggable) can be easily understood as an upgraded version of GBIC.
Chinese name: optical module
English name: Gigabit Interface Converter
Abbreviations: GBIC / SFP
Application: Interface device
SFP (Small Form-factor Pluggables) can be easily understood as an upgraded version of GBIC.
SFP (less than half the volume of the GBIC module, Video SFP you can configure more than twice the number of ports on the same panel.
As the SFP in function and GBIC basically the same, Video SFP but also by some switch manufacturers called miniaturized GBIC (Mini-GBIC).
SFP compresses the size and power consumption by placing CDR and electro-dispersion compensation outside the module. For optical communications applications in telecommunications and data communications. SFP network equipment such as switches, routers and other equipment, motherboards and fiber or UTP cable. SFP is an industry specification supported by some fiber optic device providers.
SFP supports SONET, Gigabit Ethernet, Fiber Channel, Video SFP and some other communication standards. This standard extends to SFP + and supports 10.0 Gbit / s transfer rates, including 8 gigabit Fiber Channel and 10GbE. The SFP + module introduces some of the SFP + module versions of the fiber and copper core versions. The SFP + module will be part of the motherboard implementation, rather than the module implementation [SFP GE SR] SFP GE SR Atlas Standardization, compared to the module's Xenpak, X2 or XFP version / SFP
According to the rate of 155M / 622M / 1.25G / 2.125G / 4.25G / 8G / 10G, 155M and 1.25G on the market with more, 10G technology is gradually mature, the demand is rising in the attitude of development.
According to the wavelength of 850nm / 1310nm / 1550nm / 1490nm / 1530nm / 1610nm, the wavelength of 850nm for the SFP multi-mode, transmission distance of 2KM below the wavelength is 1310 / 1550nm single mode, transmission distance of 2KM above, this The price of the three wavelengths is cheaper than the other three.
SFP transceivers are regulated by a multilateral agreement (MSA) between competing vendors. The SFP is designed according to the GBIC interface, allowing a larger port density than the GBIC (the number of transceivers per inch on the side of the motherboard), so the SFP is also called "mini-GBIC". Video SFP The associated small package transceiver (SFF transceiver) is smaller in size than the SFP, but the SFF is soldered to the motherboard as a pin through-hole device instead of plugged into the side slot on.
SFP transceivers have a variety of different types of transmit and receive, Video SFP and the user can select the appropriate transceiver for each link to provide "optical performance" that can be achieved based on available fiber types such as multimode fiber or singlemode fiber. Available optical SFPs are generally classified into the following categories: 850 nm nm / 550 m distance MMF (SX), 1310 nm wavelength / 10 km distance SMF (LX), 1550 nm wavelength / 40 km distance XD, 80 km distance ZX, 120 km distance from EX or EZX, and DWDM. The SFP transceiver also provides a copper interface that enables host devices primarily designed for optical fiber communications to communicate via UTP network cabling. There are also SFPs for wavelength division multiplexing (CWDM) and single fiber "bidirectional" (1310/1490 nm wavelength up / down).
Commercial SFP transceivers are available at speeds up to 4.25 G bps. Several packages of 10 Gbps transceivers are XFP, and the new variant "SFP +", which is basically the same as the SFP package.