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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

G.Fast performance per AlcatelYears away from market. With the showmanship of a Broadway producer, Alcatel used the best cable to demo 1.1 Gbps over 70 meters. More to the point, over unshielded twisted pair they reached 500 Mbps over 100 meters under lab conditions.

They then tested with a second pair "in the binder" and discovered crosstalk dropping speeds to 60 Mbps; with vectoring, they restored the the original speed. 

   As cable jumps to 500 megabits, telcos are looking for answers. Suggesting a near future "upgrade path" makes vectored VDSL at 50-100 meg more tempting to operaters. One chip vendor is promising 250 meg by the end of this year but that's unlikely to be shipping gear. G.fast looks to become a standard by year end. It uses frequencies up to 212 MHz, compared to 17-30 MHz in VDSL. High frequencies attenuate rapidly, so only very short loops see performance gains. 

   G.fast deployment costs are the great unknown. It will require new fiber (probably expensive) but was cleverly designed not to need power lines. (It draws power from the customers connected.) One estimate is so high as to be impractical, but another thinks the cost will be manageable. One considered opinion is " In terms of cost, G.fast vectoring is probably going to be relatively close to that of FTTH because, after all, you’re bringing fiber NEARLY to the home so you’re not going to save that much. And you require some additional equipment. But you avoid entering the home, and for some operators this is crucial, and a very costly and time-consuming part of the roll-out. So that’s where you save the money. How much depends on the particular circumstances: labor costs, how much does it cost to send an engineer to a customer for 4 hours?; new buildings (with cable ducts and pre-fab walls) vs old buildings (with beautiful stone walls and no cable ducts), etc. So cost savings could be anywhere between 0 and 25%, with perhaps 10-15% a good average.

    "Hundreds of papers" have been presented in the secret standards groups, probably a slight exaggeration of the actual count. Fortunately, ITU is opening up their standards to far more participants, so we'll have more data shortly. G.fast was also a prime topic of discussion at the TNO seminar on the beach at Scheveningen, pictured above. I've included the tweets from the conference below so you can pick out other hot topics.

    Huawei and Alcatel are cranking out the pr on DSL but read carefully to be sure of the facts. 

 

Sources: Tweets from the TNO DSL Conference in Schevenigan, Articles by Alcatel's Stefaan Vanhastel and Paul Spruyt http://www2.alcatel-lucent.com/techzine/the-numbers-are-in-vectoring-2-0-makes-g-fast-faster/ (strongly from the company point of view but valuable), private discussions and company pr below

Alcatel-Lucent and Telekom Austria Group complete world’s first trial of new technology enabling ultra-fast broadband over existing copper networks

A1, Austrian subsidiary of Telekom Austria Group, test Bell Labs G.fast vectoring technology, delivering speeds faster than 1 Gbps and demonstrating potential for copper in next-generation broadband access 

Paris – July 2, 2013 – Alcatel-Lucent (Euronext Paris and NYSE: ALU) and A1, the Austrian subsidiary of Telekom Austria Group, have conducted the world’s first trial of an innovation from Alcatel-Lucent’s Bell Labs that can upgrade existing copper telecommunications networks into ultra-fast broadband access systems capable of delivering video, data and information at speeds of more than 1 gigabit per second (Gbps).

With Alcatel-Lucent repositioning itself as a specialist in IP Networking and Ultra-broadband access, the company has adapted Bell Labs vectoring techniques - already in widespread commercial deployment in VDSL2 networks - to work with a new transmission technology called G.fast, which use a wide frequency band to achieve very high speeds on copper lines over very short distances.

G.fast is intended for typical applications of 500 megabits per second (Mbps) speeds at 100 meters or less. In recent demonstrations and under laboratory conditions, Alcatel-Lucent achieved 1.3 Gbps over 70 meters, making G.fast a promising option for service providers to complement their fiber deployments. In any fiber-to-the-home project, a substantial part of the cost-per-subscriber is in the last few meters between the nearest network cabinet and the home. These costs can be avoided by using G.fast over the existing copper telephone line, rather than having to dig up roads or private property to install new fiber.

Bell Labs vectoring technology addresses one of the challenges related to the deployment of G.fast. In many real-world applications, such as fiber-to-the-building, the copper lines serving neighboring homes are packed closely together: this results in crosstalk interference between lines, which significantly reduces the potential speed of data transmission. G.fast vectoring removes this crosstalk, stabilizes the transmission quality and enables the technology to perform to its full potential.

Key Facts

• The trial, conducted with A1 and using a Bell Labs prototype, first tested G.fast over a single, good quality cable, achieving a maximum speed of 1.1 Gbps over 70 meters and 800 Mbps over 100 meters.

• On older unshielded cables, typical of most in-building cabling in Austria, the trial achieved speeds of 500 Mbps over 100 meters on a single line. However, when a second line was introduced, creating crosstalk between the two, the G.fast speed fell to only 60 Mbps. 

• Vectoring was then enabled, removing the crosstalk and bringing the speed back up to 500 Mbps over 100m. This is a huge improvement over widely deployed DSL networks, which typically offer speeds of 5-30 Mbps, or VDSL2 vectoring networks supporting up to 100 Mbps. Fiber-to-the-home services typically range from 100 Mbps to 1 Gbps.

• G.fast, which is not yet standardized, won’t be commercially available for several years. However, it is a natural evolution of VDSL2 that, with the help of vectoring technology, could allow service providers to more quickly and cost-effectively provide subscribers with broadband speeds from several hundreds of Mbps up to more than 1 Gbps over short distances.

Quotes

Hans Pichler, Chief Technology officer at Telekom Austria Group, said: “Telekom Austria

Group´s A1 was an early adopter of Alcatel-Lucent’s VDSL2 vectoring because we understand the value of upgrading our existing copper infrastructure to give our customers the best possible broadband service. We are pleased to be working with Alcatel-Lucent at the cutting-edge of fixed broadband technology to look at the possibilities of G.fast vectoring.”

Federico Guillen, Leader, Business Line Fixed Access, said: “As a leader in fixed broadband and a pioneer of vectoring - being the first vendor to ship 1 million VDSL2 vectoring lines - Alcatel-Lucent is ideally placed to help Telekom Austria understand the potential of G.fast and vectoring. G.fast underlines the specialist expertise Alcatel-Lucent brings to customers like Telekom Austria as they expand their footprint of ultra-broadband access coverage. While this is only a trial, the impressive results show the enormous potential of G.fast for service providers around the world.”

TNO's DSL Seminar ?@DSLSeminar2013 19 Jun
#DSLSeminar2013 has brought together experts from all over the world and we hope we grow even bigger next year

Finally TNO’s Senior consultant Harrie van de Vlag, rounds off this year’s keynotes with G.fast and an Amsterdam case study
Cable measurements above 30MHz your field? John MacDonald CEng. FIET, Specialist Technical Consultant BT, discussed today Solutions to secure vectoring introduction is the topic of Serge Eiffes, Head of Access Networks at PT Luxembourg, speaking now
We are coming up to the last few of our key note speakers and presentations it’s been a fantastic three days here
TNO’s mission is to connect people & knowledge to create innovations to boost sustainable competitive strength of industry Kenneth Schneider CEO of Telebyte is informing us today about Impulse Noise, especially in the vectoring and post-vectoring environment

Arlynn Wilson from ADTRAN discusses results on Mixed VDSL/Vectored VDSL using OSB Techniques  Marc Goldburg talks about the coexistence of Vectored and Unvectored DSLs 

The first discussion of today at#DSLSeminar2013 is from Brian Bogaerts, General Manager Strategic Innovation KPN, on Access Strategy at KPN
Ahmadun Nijar Zainal Abidin, Senior Researcher at Telekom Malaysia R&D will discuss implementing Vectoring/VDSL2 in Telekom Malaysia's NW
We're about to hear a Vectoring case study from Belgacom - Franky de Smet & Steve Bultynck #DSLSeminar2013
Kai Karbach Network Strategy at Deutsche Telekom just finished discussing VDSL Vectoring from Deutsche Telekom's perspective Talking now about deep dive in potentials and challenges DSL faces is Dong Wei, Senior Research Engineer @Huawei
Paul Spruyt, DSL technology strategist at Alcatel-Lucent, is now talking about best practice Vectoring in the real world

Steps towards migration from VDSL2 to G.Fast explained by Ikanos presenter Massimo Sorbara at #DSLSeminar2013
Expand
Great discussion with Kevin Foster, President of Broadband Forum, speaking about FTTdp, & G.fast technology at the 

Today's chair Kevin Foster Broadband Forum President talked on Vectored VDSL2 & mitigating foreign crosstalk in unbundled loop environments
Today's final speaker is TNO's Senior Consultant, Jan de Nijs, talking about Cable networks & perspective for future broadband services
Frank van Berkel, of Reggefiber, making key notes about how Reggefiber get fibre to the home, challenges and regulation they face
Point Topic's Tim Johnson: VDSL will be the leading superfast broadband technology for Europe over the next decade
Matthias Büning, Legal and Regulatory Affairs at EWE is discussing Vectoring from a regulatory point of view now at The conference room has a splendid view overlooking the beach and the sea, an excellent setting for our social event tomorrow
First speaker of this year’s event is Scott Marcus, Director at WIK-consult, talking about the richer mix of technologies #DSL

The Site for gfast 230
 

G.fast 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. http://bit.ly/BBFBASE

Deutsche Telecom: 35b Supervectoring Delayed to 2019 http://bit.ly/35blater
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 G.fast. DT itself is planning extensive G.fast deployments in 2019, mostly in apartment buildings. http://bit.ly/35blater

Gigabit 100 Meters - Unless the Wires are Lousy http://bit.ly/gflousy
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 G.fast 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 G.fast & 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. http://bit.ly/gflousy

AT&T Wants Coax 2-5 Gigabit G.fast. Very Soon. http://bit.ly/ATTCoax
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."http://bit.ly/ATTCoax

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