The SFP shell produced by Dongguan Shuwang Hardware Products Co., Ltd. is used for small pluggable (SFP). It is a compact hot pluggable network interface module used for telecommunications and data communication applications. The SFP interface on the network hardware is a modular slot for a specific media transceiver, which is used to connect optical fiber cables or sometimes copper cables. [1] Compared with fixed interfaces (such as modular connectors in Ethernet switches), the advantage of using SFP is that each port can be equipped with any suitable type of transceiver as required.

The SFP shell outline specification and electrical interface are specified by the multi-source protocol (MSA) sponsored by the small specification Committee. [2] SFP replaces the larger Gigabit interface converter (GBIC) in most applications and is called mini GBIC by some suppliers. [3]

There are SFP transceivers that support synchronous optical network (SONET), Gigabit Ethernet, fibre channel, PON, and other communication standards. Initially, the typical speed of Ethernet SFP is 1 Gbit / s, and the typical speed of fibre channel SFP module is up to 4 Gbit / s. [4] In 2006, the speed of SFP + shell was increased to 10 Gbit / s with the SFP + specification, while the design speed of SFP 28 shell was 25 Gbit / s with the SFP 28 @ iteration. [5]

A slightly older brother is a four channel four channel small pluggable (qsfp external cold wind). The allowable speed of the additional channel is 4 times that of its corresponding SFP. In 2014, qsfp28 variants were released, allowing speeds up to 100 Gbit / s. [6] In 2019, the closely related qsfp56 was standardized [7], doubling the maximum speed to 200 Gbit / s, and the products have been sold from major suppliers. [8] There are some inexpensive adapters that allow SFP transceivers to be placed in qsfp ports.

Sfp-dd [9] allows 100 Gbit / s on two channels, and qsfp-dd [10] allows 400 Gbit / s on eight channels. [11] These uses are directly backward compatible with the overall dimensions of their respective predecessors.

The production scheme of Dongguan Shuwang Hardware Products Co., Ltd. is OSFP die-casting shell, which is used for qsfp (octal small format pluggable). Its products will be released in 2022 [12], and can realize 800 Gbit / s link between network devices. It is a slightly larger version than qsfp, allowing greater power output. The OSFP standard was originally released in 2016 [13], and the 4.0 version released in 2021 allows the adoption of 8 × The 100 Gbit / s electrical data channel realizes 800 Gbit / s. [14] Its supporters say that low cost adapters will allow backward compatibility with qsfp modules