page_title: Small form-factor pluggable transceiver
section_title: 10 Gbit/s SFP+
hierarchical_section_title: Small form-factor pluggable transceiver / SFP types / 10 Gbit/s SFP+
caption_attribution_description: English: A 10 Gbit/s XFP transceiver and a 10 Gbit/s SFP transceiver side by side.
context_page_description: The small form-factor pluggable is a compact, hot-pluggable network interface module used for both telecommunication and data communications applications. An SFP interface on networking hardware is a modular slot for a media-specific transceiver in order to connect a fiber-optic cable or sometimes a copper cable. The advantage of using SFPs compared to fixed interfaces is that individual ports can be equipped with any suitable type of transceiver as needed.
  The form factor and electrical interface are specified by a multi-source agreement under the auspices of the Small Form Factor Committee. The SFP replaced the larger GBIC in most applications, and has been referred to as a Mini-GBIC by some vendors.
  SFP transceivers exist supporting synchronous optical networking, Gigabit Ethernet, Fibre Channel, PON, and other communications standards. At introduction, typical speeds were 1 Gbit/s for Ethernet SFPs and up to 4 Gbit/s for Fibre Channel SFP modules. In 2006, SFP+ specification brought speeds up to 10 Gbit/s and the SFP28 iteration is designed for speeds of 25 Gbit/s.
  A slightly larger sibling is the four-lane Quad Small Form-factor Pluggable.
context_section_description: The SFP+ (enhanced small form-factor pluggable) is an enhanced version of the SFP that supports data rates up to 16 Gbit/s. The SFP+ specification was first published on May 9, 2006, and version 4.1 published on July 6, 2009. SFP+ supports 8 Gbit/s Fibre Channel, 10 Gigabit Ethernet and Optical Transport Network standard OTU2. It is a popular industry format supported by many network component vendors. Although the SFP+ standard does not include mention of 16 Gbit/s Fibre Channel, it can be used at this speed.
  SFP+ also introduces direct attach for connecting two SFP+ ports without dedicated transceivers. Direct attach cables (DAC) exist in passive (up to 7 m), active (up to 15 m), and active optical (AOC, up to 100 m) variants.
  10 Gbit/s SFP+ modules are exactly the same dimensions as regular SFPs, allowing the equipment manufacturer to re-use existing physical designs for 24 and 48-port switches and modular line cards. In comparison to earlier XENPAK or XFP modules, SFP+ modules leave more circuitry to be implemented on the host board instead of inside the module. Through the use of an active electronic adapter, SFP+ modules may be used in older equipment with XENPAK ports  and X2 ports.
  SFP+ modules can be described as limiting or linear types; this describes the functionality of the inbuilt electronics. Limiting SFP+ modules include a signal amplifier to re-shape the (degraded) received signal whereas linear ones do not. Linear modules are mainly used with the low bandwidth standards such as 10GBASE-LRM; otherwise, limiting modules are preferred.
caption: A 10 Gigabit Ethernet XFP transceiver and a SFP+ transceiver side by side.
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