G.fast

G.fast
Fast access to subscriber terminals
StatusIn force
Year started5 December 2014 (2014-12-05)
Latest version(10/20)
October 2020
OrganizationITU-T
CommitteeITU-T Study Group 15
Base standards
  • G.997.2
  • G.9700
  • G.9701
Domaintelecommunication
LicenseFreely available
Website
Sckipio 24port DPU
Sckipio 24-port DPU (Distribution point unit), provides G.fast service.

G.fast is a digital subscriber line (DSL) protocol standard for local loops shorter than 500 meters, with performance targets between 100 Mbit/s and 1 Gbit/s, depending on loop length.[1] High speeds are only achieved over very short loops. Although G.fast was initially designed for loops shorter than 250 meters, Sckipio in early 2015 demonstrated G.fast delivering speeds over 100 Mbit/s at nearly 500 meters and the EU announced a research project.[2]

Formal specifications have been published as ITU-T G.997.2, G.9700, and G.9701, with approval of G.9700 granted in April 2014 and approval of G.9701 granted on December 5, 2014.[3][4][5][6] Development was coordinated with the Broadband Forum's FTTdp (fiber to the distribution point) project.[7][8][3]

The letter G in G.fast stands for the ITU-T G series of recommendations; fast is a recursive acronym for fast access to subscriber terminals.[9] Limited demonstration hardware was demonstrated in mid-2013.[10] The first chipsets were introduced in October 2014, with commercial hardware introduced in 2015, and first deployments started in 2016.[11][12][13]

  1. ^ ITU (2019-06-25). "Maximizing the telco sweats: G.fast at 1 Gigabit/sec". ITU News. Archived from the original on 2021-04-05. Retrieved 2021-04-05.
  2. ^ "100+ Mb/s 400 meters". G.fast News. Fast Net News. February 4, 2015. Archived from the original on March 9, 2017.
  3. ^ a b Van der Putten, Frank (2014-05-20). "Overview of G.fast: Summary overview and timeline" (PDF). G.fast Summit 2014. Archived from the original (PDF) on 2014-10-15. Retrieved 2014-10-09.
  4. ^ "G.9700 : Fast access to subscriber terminals (G.fast) - Power spectral density specification". ITU-T. 2014-12-19. Retrieved 2015-02-03.
  5. ^ "G.9701 : Fast access to subscriber terminals (G.fast) - Physical layer specification". ITU-T. 2014-12-18. Retrieved 2015-02-03.
  6. ^ "G.fast broadband standard approved and on the market". ITU-T. 2014-12-05. Retrieved 2015-02-03.
  7. ^ "New ITU broadband standard fast-tracks route to 1Gbit/s". ITU-T. 2013-12-11. Retrieved 2014-02-13.
  8. ^ Starr, Tom (2014-05-20). "Accelerating copper up to a Gigabit in the Broadband Forum" (PDF). G.fast Summit 2014. Broadband Forum. Archived from the original (PDF) on 2015-04-02. Retrieved 2015-03-13.
  9. ^ "ITU-T work programme - G.9700 (ex G.fast-psd) - Fast access to subscriber terminals (FAST) - Power spectral density specification". ITU-T. 2014-01-29. Retrieved 2014-02-14.
  10. ^ Ricknäs, Mikael (2013-07-02). "Alcatel-Lucent gives DSL networks a gigabit boost". PCWorld. Retrieved 2014-02-13.
  11. ^ "Sckipio Unveils G.fast Chipsets". lightreading.com. 2014-10-07. Retrieved 2014-10-09.
  12. ^ Hardy, Stephen (2014-10-22). "G.fast ONT available early next year says Alcatel-Lucent". lightwaveonline.com. Retrieved 2014-10-23.
  13. ^ Verry, Tim (2013-08-05). "G.fast Delivers Gigabit Broadband Speeds To Customers Over Copper (FTTdp)". PC Perspective. Retrieved 2014-02-13.