Small Form Factor Pluggable (Sfp) Transceiver Multi-Source Agreement
An SFP-DD specification, allowing 100 Gbps on two lanes and a QSFP-DD specification allowing 400 Gbps on eight lanes have been published. These use a form factor that is backwards compatible with their respective predecessors. As an alternative competitor, the Octal Small Format Pluggable (OSFP) transceiver is also intended for 400 Gbps fiber optic connections between network devices with more than 8 × 50 Gbps of electrical data traces.  This is a slightly larger version than the QSFP form factor, capable of handling higher output performance. The OSFP standard was originally announced on November 15, 2016.  Proponents say a low-cost adapter allows compatibility with QSFP modules.  It is true that some system providers have attempted to undermine the standardization value of SFP MSA or SFP+ MSA. The most common pattern is to write unique code to a part of the indefinite memory in the EEPROM of each SFP/SFP+. When the transceiver is inserted into the host switch, its EEPROM is read and if the code is “fake”, the module is rejected as “incompatible”.
But fiber doors can. At present, FS.COM offers a complete brand-compatible transceiver solution, which can meet the requirements of Cisco, HP, Juniper, NETGEAR, Brocade, etc. SFP+ also introduces Direct Attach for connecting two SFP+ ports without a dedicated transceiver. Direct attachment cables (DAC) are available in passive (up to 7 m), active (up to 15 m) and active optical (AOC, up to 100 m) variants. Quad Small Form-factor Pluggable (QSFP) Transceivers are available with a wide range of transmitter and receiver types, allowing users to choose the appropriate transceiver for each connection to provide the required optical range via multimode or singlemode optical fiber. The form factor and electrical interface are specified by a multi-source agreement (MSA) under the aegis of the Small Factors Committee.  In most applications, SFP has replaced the larger GBIC and has been referred to as a mini-GBIC by some providers.  Device manufacturers rely on MSAs to develop their systems to ensure interoperability and interchangeability of interface modules. Multi-source scoring recognizes the choice that end users retain in the choice of module providers, which reduces costs through economies of scale.