Sfp-2, 3, 3, 3, 23, 24, 25, and 26 fiber modules, multimode, 1310nm, 2km distance, 2lc fiber connector. The size of the SFP module is half that of the GBIC module, and more than twice the number of ports can be configured on the same panel. Because the function of the SFP module is basically consistent with GBIC, it is also called minigbic by some switch manufacturers. The size and power consumption of the SFP module are more compressed by putting CDR and EDC outside the module. It is used for optical communication applications in telecommunication and data communication. SFPs connect the motherboard and optical fiber or UTP cables of network devices such as switches and routers. SFPs are industry specifications supported by some fiber optic device providers

Brief history of Ethernet 10 Gigabit interface

The 10 Gigabit small form factor pluggable (10 Gigabit small form factor pluggable) is a kind of hot pluggable optical transceiver independent of communication protocol. The wavelength of transmitting light is 850nm, 1310nm or 1550nm. It is used in 10Gbps SONET / SDH, fibre channel, Gigabit Ethernet, 10 Gigabit Ethernet and other applications, including DWDM link. XFP contains a digital diagnostic module similar to sff-8472, but is extended to provide a powerful diagnostic tool.

The type of SFP + supports SONET, Gigabit Ethernet, fiber channel, and some other communication standards. This standard is extended to SFP + to support 10.0 Gbit / s transmission rate, including 8 Gigabit fibre channel and 10 GBE. Compared with the xenpak, X2 or XFP versions of the modules, some circuits of the SFP + module are implemented on the motherboard rather than in the modules



There are many different sending and receiving types of SFPs. Users can choose the appropriate transceiver for each link to provide the "optical performance" that can be achieved based on the available fiber type (such as multimode fiber or single-mode fiber). The available optical SFPs are generally classified into the following categories: MMF (SX) at 850 nm / 550 m, SMF (LX) at 1310 nm / 10 km, XD at 1550 nm / 40 km, ZX at 80 km, ex or ezx at 120 km, and DWDM. The SFP transceiver also provides copper cable interface, which enables the host equipment mainly designed for optical fiber communication to communicate through UTP network cable. There are also wavelength division multiplexing (CWDM) and single fiber "bidirectional" (1310 / 1490 nm upstream / downstream) SFPs.
Commercial SFP transceivers can provide a rate of 4.25 Gbps. Several packaging forms of 10 Gbps transceiver are XFP, and a new variant "SFP +" which is basically consistent with the package of SFP.
MetaStar's SFP + optical module supports multi protocol from 9.9gb/s to 11.3gb/s, supports ddmi data diagnosis function, and conforms to SONET OC-192 / SDH STM-64 standard.
The SFP optical module of Huatuo conforms to MSA protocol. At the same time, it conforms to the definition of fc-pi-2 transmission specified in IEEE Std 82.3 and one fibre channel, and conforms to RoHS and lead-free standards [1]

The SFP + optical transceiver module is a new generation of 10G optical transceiver module. According to ANSI T11 protocol, it can meet the application of 8.5g fiber channel and 10G Ethernet.
At present, most optical SFP transceivers support sff-8472 (industry standard multilateral agreement). According to sff-8472 protocol, digital diagnostic monitor (DDM) function must be supported. This feature enables the end user to detect the parameters of SFF in real time, such as temperature, VCC and TX bias current Current, TX power and Rx power.

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