spacer 2Telebyte Gfast Testing Guide 320

gfast map nov

Dark Green: 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 Pink: Smaller carriers in Germany, Norway, Finland, Japan

Light Green: Incumbent likely:  France, Germany, Italy

ITU makes it official. Longer reach, reverse power, downloaded upgrades for the customer equipment, DTA over coax, and a dozen other improvements. The major chip vendors, Broadcom and Sckipio, are already hard at work. The carriers are hoping for equipment in the second half of 2017 but that may be a little early. The amendments extend the frequency range up to 212 MHz. That will almost double speeds on very short loops, such as the apartment buildings AT&T is planning to serve.

BT needs longer reach. Their finance guys insist they use existing cabinets rather than building to the distribution points closer to the customer. was designed for 50-200 meters but existing cabinets are often 350 meters away or more. The new standard increases the maximum transmit power up to +8 dBm, with a practical goal of 300 megabits 300 meters. AT&T has been vocal they want a true gigabit to compete with cable, not "up to a gigabit." Comcast is well along deploying gigabit cable to 40M U.S. homes.

The ITU has also started work on G.mgfast (Multi-gigabit.)

Alcatel/Nokia is the pioneer here with XG-FAST, which reaches over 10 gigabits over 30 meters in lab tests. (Below) It uses full duplex, more spectrum, and other new techniques. Huawei also is making contributions.  

Here's the pr

Telekom Austria Group: Austrian subsidiary A1 presents XG-FAST with transmission rates in excess of 11 GBit/s via copper cable

Vienna, 22 March 2017

At a demonstration carried out together with Nokia in Vienna last week, transmission rates in excess of 10 Gbit/s were achieved for the first time in Austria via copper cable in the fixed line network. The record speed was made possible by an advance in existing technology, which also supports ultra-high-speed broadband Internet over conventional copper lines and which, in future, will be able to cover steadily rising demand for high-bandwidth Internet services.

The Austrian subsidiary A1 is using the potential of existing copper lines in residential areas - the test conducted in Vienna used a 30-meter-long copper cable and test equipment supplied by Nokia Bell Labs, the company's research lab. A1 and Nokia demonstrated that the copper cables existing between sidewalk or the basement of a building or apartments suffice to achieve speeds in excess of 10 Gbit/s in future. Two-hour HD films could thus be downloaded in less than 10 seconds and 1,000 photos transferred in less than two seconds. Households could be given access to the A1 fiber optic network with no drilling and chiselling work and without the time and expense this involves.

"In urban areas in particular, demand for ultra-high-speed broadband services with data transmission rates in excess of 100 Mbit/s is growing faster than an area-wide high-speed fiber optic infrastructure can be completed. XG-FAST enables us to bring fiber-optic-speed Internet to our customers over our existing telephone copper wires. We remain faithful to our long-term vision to bring fiber-optic lines to every home - however, until then, XG-FAST will serve as a smart bridging technology" said Sascha Zabransky, Director Group Technology & Future Services at Telekom Austria Group about the promising demonstration.

XG-FAST uses the final stretch of the existing copper network to bring super-fast Internet to homes and offices. The test carried out today shows how in a few years' time the potential of existing networks will be used to bring ultra-high-speed broadband to the customers.

"Together with A1 we are working towards providing high-bandwidth services quickly and cost-effectively, using a combination of fibre-optic and copper technologies," said Peter Wukowits, Nokia Country Manager Austria and Head of the Customer Business Team Central Europe. "The XG-FAST trial is an important milestone in our efforts to achieve very high speeds also over copper wires and at the same time to bring fibre-optic technology closer to residential and business customers."

A1 is constantly adapting transmission technologies to rising bandwidth requirements. The and XG-FAST technologies are particularly suitable for FTTB (Fiber-to-the-Building) expansion in residential areas. Under this model A1 installs high-speed fiber-optic lines to a node in the cellar of the building or the boundary of the property, which then connects with the existing line.


The Site for gfast 230 News

I’m still working through remarkable presentations from the Broadband Forum events. Michael Weissman, Bernd Hesse and team did a remarkable job choosing the speakers.

Deutsche Telecom: 35b Supervectoring Delayed to 2019
Broadcom is now over 3 years late. DT briefed German reporters after their financial call and revealed 35b was now delayed until 2019. 35b should deliver 200+ meg downloads 500-600 meters, a crucial tool for DT, which is losing share to cable. Cable now covers about 70% of Germany and is expanding. DT now only offers 50-100 megabit DSL while cable is often 400 megabits, going to a gigabit. 

The problem is software; the hardware is shipping and supposedly will work. DT says 35b is not ready to turn on. Broadcom in 2015 said 35b was in "production" in the press release below. Alcatel in early 2016 said to expect complete systems very soon. "35g is very similar to 17a so there should be little delay."

Broadcom's problems are leading major telcos and vendors to have a plan B, using Sckipio DT itself is planning extensive deployments in 2019, mostly in apartment buildings.

Gigabit 100 Meters - Unless the Wires are Lousy
Speeds are fine, "Unless there's a line problem." I've been reporting for three years that ~10% of lines have problems. In the chart by Rami Verbin of Sckipio, he finds goes ~130 meters on good lines. Poor lines have about half the reach. 

His chart roughly matches the reports from Swisscom, Belgacom, and England for both & vectored DSL. The 10% with problems can cause the majority of the line-related complaints to support. The angry customers drive up cost.

Rami's solution to reach the gigabit is bonding, supported on the Sckipio chips. Verbin made some additional points:

  • 4 gigabits is possible by bonding two decent 2 gigabit lines.
  • Even in a service from remote cabinets, ~25% are close enough to get a full gigabit."
  • cDTA and iDTA are practical ways to deliver much higher upstream by switching some bandwidth from downstream to upstream only when needed.
  • 35B will probably be similar but Deutsche Telecom doesn't expect to deploy until 2019.

AT&T Wants Coax 2-5 Gigabit Very Soon.
AT&T faces intense competition from cable, talking about 10 gigabits in both directions. (Cable will only be 1 gig down, ~100 meg up, until ~2021.) AT&T wants something to brag about as well.

AT&T gained millions of lines of coax as part of the DirecTV deal. Alcatel and Huawei are leading the development of G.mgfast. That uses 424 MHz, full duplex, to achieve ~2.5 gigabits in both directions. The reach on telco twisted pair is only about 30 meters. On coax, those speeds can probably extend far enough to service most apartment buildings. Using 848 MHz, speeds can reach 5 gigabits. The ITU standards group has been aiming for 2019-2020 for G.mgfast, too slow for AT&T's marketers. David Titus wants a high-speed standard for coax "early in 2018." He believes that is "doable."

Read more ...