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Title: Qsfp  
Author: World Heritage Encyclopedia
Language: English
Subject: 100 Gigabit Ethernet, C Form-factor Pluggable, XFP transceiver, Ethernet, Multi-source agreement
Collection: Hot-Swappable Transceiver
Publisher: World Heritage Encyclopedia


QSFP 40GB Transceiver

The Quad Small Form-factor Pluggable (QSFP) is a compact, hot-pluggable transceiver used for data communications applications. It interfaces networking hardware to a fiber optic cable. It is an industry format jointly developed and supported by many network component vendors, allowing data rates from 4x10 Gbit/s.[1] The format specification is evolving to enable higher data rates; as of May 2013, highest possible rate is 4x28 Gbit/s.[2]

The QSFP specification accommodates Ethernet, Fibre Channel, InfiniBand and SONET/SDH standards with different data rate options. QSFP+ transceivers are designed to carry Serial Attached SCSI, 40G Ethernet, QDR (40G) and FDR (56G) Infiniband, and other communications standards. QSFP modules increase the port-density by 3x-4x compared to SFP+ modules.

QSFP has 38 pins with 4 high-speed TX pairs (CML-I) and 4 high-speed RX pairs (CML-O).[3][4]

See also


  1. ^ SFF Committee (May 10, 2013). "SFF Committee Specification SFF-8635 for QSFP+ 10 Gb/s 4X Pluggable Transceiver Solution (QSFP10)". 
  2. ^ SFF Committee (May 10, 2013). "SFF Committee Specification SFF-8665 for QSFP+ 28 Gb/s 4X Pluggable Transceiver Solution (QSFP28)". 
  3. ^ INF-8438i Specification for QSFP (Quad Small Formfactor Pluggable) Transceiver Rev 1.0 November 2006
  4. ^ SFF-8436 Specification for QSFP+ 10 Gbs 4X PLUGGABLE TRANSCEIVER Rev 4.8 October 31, 2013

External links

  • QSFP Overview
  • SFF Committee

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