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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

Usain bolt Fastest at 100 meters"G.fast can reach 400 meters, and for distances under 250 meters it is faster than the proposed new 35 MHz VDSL2 profile (“MDSL”)." A senior engineer writes. He corrected my comment, "100 meter G.fast doesn't go far enough." He added, "For distances under 250 meters it is faster than the proposed new 35 MHz VDSL2 profile." The speeds past 100 meters drop very rapidly but are still perhaps 100 megabits down at 400 meters.

Sckipio claims lab tests of G.fast at speeds produced 500Mbps for 200 meters and 200Mbps at 400 meters, (below) Sckipio, like many in G.fast, counts both upstream and downstream. No one does that in fiber or cable making this confusing for many.  Subtracting upstream would reduce Sckipio claims by 1/4th to 1/2 

With BT interested in 400 meter deployments, the industry is responding. "Gigabit DSL" makes great headlines but requires coming within 50 meters of most homes, an expensive proposition.

Many carriers are looking for a choice between the 100-200 megabits of DSL vectoring and the 300-700+ megabits of the G.fast standard. That's MDSL or Midi-DSL, currently an area of much research and many claims by the manufacturers. Huawei calls it SuperVector;  Adtran calls it "frequency-division vectoring"; Alcatel's name is name is Vplus. Vectored VDSL2 was designed for 100 megabits down for 700-1000 meters, one heckuva result for 10 years ago. Telcos desired more speed as they realized that cable was going to 400 megabits and over a gigabit. (I've been predicting gigabit cable since 2005 but it wasn't practical until a few years ago.) In fear, the telcos supported G.fast for maximum performance. 

G.fast is becoming real, with BT announcing a 4,000 home trial beginning this summer. 

  

Sckipio Makes G.fast Go Twice as Far

Makes New FCC Regulations More Practical

February 4, 2015, Ramat Gan, Israel – Sckipio Technologies, the leader in G.fast, today announced it has successfully demonstrated G.fast at speeds greater than 500Mbps for 200 meters – double the official ITU targets for this new broadband standard. In laboratory trials with multiple broadband access service providers globally, Sckipio also achieved more than 200Mbps at 400 meters, again doubling the target distance for the given rate. These important test results will help widen the potential footprint for G.fast and help telecommunications companies better address new FCC regulations now being proposed in the U.S.

“G.fast was optimized to deliver up to 1Gbps in short distances,” said David Baum, CEO of Sckipio Technologies. “Yet, we tuned our technology to allow telcos to reach more customers with higher performance from farther away.”

The U.S. government recently redefined broadband access as 25Mbps or greater – downgrading most xDSL subscribers to non-broadband status. While cable companies have access to technologies such as DOCSIS to achieve greater than 25Mbps performance, telcos have lacked affordable alternatives to fiber to the home (FTTH) and xDSL. That’s why the International Telecommunications Union (ITU-T) created a new standard called G.fast, which was approved in December 2014.

The Sckipio improvement of G.fast performance over distances such as 400 meters will open up more potential uses for G.fast in rural environments. It also will help in very dense environments like large cities where as many as 30% of all residences lack alternatives to cable operators.

The initial test results are preliminary and based upon lab evaluations over real binders.  Sckipio expects additional performance improvements as the solution is further optimized.

About Sckipio

Sckipio is the leader in G.fast modems and is dedicated to delivering ultra-broadband using next-generation G.fast-based Fiber-to-the-distribution point (FTTdp) architectures. Sckipio offers a complete G.fast solution – chipsets bundled with software – for a variety of access and mobile backhaul applications based on the ITU G.fast G.9700 and G.9701 standards, to which Sckipio is a leading contributor. Founded by a veteran team of communications experts with deep experience in broadband access and home networking solutions, and backed by leading venture capitalists, Sckipio is well positioned to win the market for the next-generation of broadband access solutions. For more information about Sckipio, visit our website at www.sckipio.com.

Media Contact:

Rainier Communications

Karen Quatromoni

kquatromoni@rainierco.com

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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