Gfast map

gfast map copy


In 2016, looked very promising.
Thousands worked at developing and deploying.
It wasn't enough. 
Most carriers are investing
in fiber or 5G instead.


Dark Blue: Firm commitments from incumbent: BT (10M), Belgacom, Australian NBN, Swisscom,  Austria, Bezeq Israel, Chunghwa Taiwan, Telus Canada, Telekom South Africa, SK Korea, (U.S.) AT&T, Century, Frontier, Windstream, Belgium, Omantel

Mid Blue: Smaller carriers in Germany, Norway, Finland, Japan

Light Blue: Incumbent likely:  France, Germany, Italy

Hinting they are getting closer to product but no date is set. Jochen Maes and team have been wowing the world with high speeds over phone wires for a couple of years, including a recent visit to Australia that "generated peak aggregate data throughput speeds of more than 8 Gbps over a 30-meter twisted-pair copper cable. A 5 Gbps peak aggregate speed was achieved over 70 meters of twisted-pair copper cable." They've previously shown 5 gig+ to Deutsche Telekom. The short reach limits the possible applications; the natural market, apartment buildings, needs far more ports than the 16 Nokia currently supports. I've heard rumors of more powerful vectoring engines to support more ports but none were shown at the recent BBWF.

Enormous processing power is required for the vectoring at these data rates and for the noise cancellation required for full duplex. Over 100 MHz, there is substantially more noise than signal. Until we have power optimized custom chips, the heat and power problems will be very challenging. Full duplex - sending both upstream and down in the same spectrum - is emerging from the labs for wireless networks at much lower speeds. CableLabs is enthusiastic about full duplex for DOCSIS, but the delivery date is well into the future. Nokia remains coy about any date for production units of XG-FAST, but their salesmen are chatting up customers as though they are fairly close.

Sckipio, Adtran, and Calix are getting excellent results using over coax for telcos. AT&T and others have millions of apartments with coax to a rooftop antenna, installed for DirecTV. Nokia brought the XG demo to the recent SCTE cable show and is hoping to expand in that market. It hasn't been well publicized, but Alcatel has been selling high-end routers to numerous cablecos.  

 Everything is speculative until enough engineers have production units to test.

Nokia and nbn demonstrate power of XG-FAST with successful lab trial of technology in Australia

18 October, 2016

  • Trial demonstrates capability of next-generation copper technologies to deliver future high-capacity ultra-broadband services and applications
  • Technology positions nbn for network evolution to meet future ultra-broadband demand

Espoo, Finland - Nokia and nbn have announced the successful completion of an XG-FAST trial that achieved throughput speeds of 8 Gigabits per second (Gbps) in lab conditions. The lab trial demonstrated the capability of XG-FAST to meet nbn's future demands for high-quality Internet services using widely deployed copper infrastructure.

XG-FAST, a Nokia Bell Labs-developed extension of Nokia's commercially available technology, enables service providers to generate fiber-like speeds of more than 10Gbps over short distances using existing copper infrastructure. With a significant proportion of nbn's nationwide broadband network rollout being completed using existing copper networks, XG-FAST is being tested as a potential asset for future upgrades.

The XG-FAST trial conducted in nbn's North Sydney-based lab facilities generated peak aggregate data throughput speeds of more than 8 Gbps over a 30-meter twisted-pair copper cable typically deployed in field. A 5Gbps peak aggregate speed was achieved over 70 meters of twisted-pair copper cable.

Dennis Steiger, CTO at nbn said: "Although XG-FAST is still in its very early stages of development, the lab trials we have conducted demonstrate the huge potential that the technology offers. XG-FAST gives us the ability to deliver multi-gigabit speeds over copper lines - virtually on a par with what is currently available on Fiber-to-the-Premises - but at a lower cost and time to deploy. We are really thrilled to be the third operator in the global market to run lab trials of XG-FAST, following in the footsteps of BT last year and Deutsche Telekom in February. This shows that nbn is committed to delivering Australians the best possible broadband experience on the nbn(TM) network."

Federico Guillen, president of Nokia's Fixed Networks business group, said: "nbn's flexible approach to network architecture makes it perfectly suited to future upgrades based on emerging technologies like XG-FAST, which is designed to provide high-quality, multi-gigabit broadband over short cable distances. We are committed to further developing the technology to eventually support 2Gbps or more at 100 meters, enabling longer distances to effectively cover buildings and clusters of homes without the need to rewire. Nokia will continue to work with nbn to ensure they see the latest developments and technology innovation to evolve their network and deliver ultra-broadband to more people sooner."


Nokia and Deutsche Telekom show how XG-FAST technology can extend copper network speeds and meet future data demands

1 February, 2016

Press Release

1 February, 2016

Espoo, Finland - Nokia has completed a laboratory trial with Deutsche Telekom that has demonstrated how XG-FAST, a new fixed ultra-broadband access technology, can be used by service providers to meet ever-growing demands for high-quality Internet services delivered over their existing copper networks. The lab trial was conducted end of 2015 by Nokia's subsidiary Alcatel-Lucent.

XG-FAST is a Bell Labs-developed extension of Nokia's commercially available technology. The trial conducted at Deutsche Telekom's cable laboratory in Darmstadt, Germany, generated data throughput speeds of more than 10 gigabits-per-second (Gbps), approximately 200 times faster than speeds in the average residential broadband connection today. In providing fiber-like speeds, the copper-based technology could enable a two-hour HD movie to download in less than 10 seconds, or for 1,000 photos to be uploaded in less than two seconds.

Deutsche Telekom's network - which uses VDSL2 Vectoring as well as fiber-to-the-home (FTTH) technology - currently offers customers access speeds of up to 100 megabits-per-second (Mbps). In enabling Deutsche Telekom to make efficient use of its existing copper network infrastructure, the innovative XG-FAST technology could also enable it to deliver further on commitments to Germany's national broadband targets for providing more bandwidth to more people.

Key Facts:

  • Technologies such as and XG-FAST use the last section of existing copper networks to deliver fiber-like speeds to homes and offices. XG-FAST is in the early stages of lab testing, but has exceeded expectations in trials with several customers so far.
  • The XG-FAST trial with Deutsche Telekom demonstrated an aggregated bandwidth exceeding 11Gbps on two bonded pairs of Category 6 cable at 50 meters in length. Similar tests using standard drop cable illustrated the feasibility of XG-FAST for fiber-to-the-front door applications, achieving aggregate rates that exceed 8Gbps over 50m.  All trials were performed using prototype equipment from Bell Labs under laboratory conditions.
  • XG-FAST is also capable of delivering 1Gbps symmetrical services at distances of 70m enabling operators to deliver fiber-like speeds inside buildings using existing telephone lines, eliminating the need to install new cabling. This allows for faster installation times and less hassle for the end-user. 
  • Nokia's fixed ultra-broadband access portfolio offers service providers a comprehensive mix of fiber and copper access technologies to suit the needs of any deployment.

Federico Guillén, President of Fixed Networks, Nokia, said: "As a global leader in ultra-broadband fixed access we are offering operators a mix of fiber and copper technologies to deploy high-quality services more quickly and cost-effectively. The XG-FAST trial with Deutsche Telekom represents an important milestone in our ongoing efforts to extend the potential of copper for delivering ultra-fast speeds, while also bringing fiber closer to residential and business users."

Bruno Jacobfeuerborn, CTO of Deutsche Telekom, said: "Working on this demonstration we can see the future possibilities of XG-FAST in maximizing existing assets. This will provide another technology option which could enable us to offer high-speed connectivity to our customers quickly and cost-effectively, and at the same time, move our fiber infrastructure closer to our customers."