The small form-factor pluggable (SFP) is a compact, hot-pluggable transceiver used for both telecommunication and data communications applications.
SFP optics are designed to support SONET, Gigabit Ethernet, Fibre Channel, and other communications standards. Most SFP optics are used for Gigabit Ethernet and come in a wide variety of transmitters/receivers for different distances and fiber types as well as conversion to RJ-45 (copper).Solid Optics SFP optics are compliant with MSA SFP specification.SFP if the successor to the GBIC and about half the size of the GBIC. It has several aliases which are used in the industry, such as: SFP, GLC and miniGBIC.
Most network vendors are using this form factor for their 1G transmission. In addition, other protocols can be used such as Fiber Channel and STM/OC. In today's current market, 10G speeds can also be achieved with SFP optics.SFP optics have a Transceiving side (Tx) and a receiving side (Rx). The transceiver has a laser which communicates to the receiving side of the other optic on the other side.
SFP optics come in 4 different versions: T, SX, LX, and ZX. The SX version will work on Multi Mode fiber, the other 2 work only on Single Mode fiber. The LX will cover a max of 10km and the ZX of 80. The T (GLC-T) version is the RJ-45 version. Although most network manufacturers only offer these 4 standard optic ranges for SFP optics, there is actually a much larger range of SFP optics available. For example, the maximum distance for SFP optics currently available is 200km. The newer SFP optics come with DOM (Digital Optical Monitoring) also called DDM (Digital Diagnostic Monitoring). This enables the end user to monitor the temperature, voltage use, Tx power and Rx power of the SFP optics. Most modern switches have this functionality built in. Solid Optics offers SFP optics for most manufacturers.