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

Sckipio-24-ports

Supporting 30A should win Japanese & Korean market. The biggest problem for most telcos deploying DSL is that until now, no one made a DPU with more than 16 ports. HFR of Korea has the first 24 port DPU and a giant customer ready to go. $15B SK Telecom is Korea's largest wireless carrier and #2 in fixed. There are 9M apartments in Korea served with VDSL and copper LAN, most running at 100 megabits.

Korea Telecom is actively deploying GIGA Wire, their version of G.hn, for higher speeds. They intend to upgrade 95% of those units by the end of 2017. SK needs to respond quickly. Japan is similar; millions of their "fiber" lines are fiber to the basement + VDSL. Korea and Japan used an advanced version of VDSL, using 30 MHz rather than the 17 MHz common elsewhere. Ikanos, now gone, had long been the preferred vendor. Sckipio is first with G.fast chips designed to work with VDSL 30a. 

Curtis Frankenfeld of Century recently told me, "I would like G.fast to support a larger vectoring group than the current 16 ports." 

For now, Century is only using G.fast in smaller buildings. They want to avoid the binder management challenges in bigger buildings. Many buildings have far more than 16 apartments, with wires in the same bundle.

To get high speeds, all the wires in the bundle have to be "vectored" to reduce noise. At G.fast speeds of 500 megabits and more, that's been a challenge. Some vendors promise to reach 48 or 96 ports with an external vectoring unit. It doesn't look like they will be available in Q4, the original roadmap.

HFR and Sckipio Announce World’s First 24-Port G.fast DPU

Solution targets South Korea, Japan and other Asian markets

Ramat Gan, Israel – October 11, 2016 – Sckipio Technologies and South Korean network infrastructure equipment maker HFR, Inc. announce the world’s first G.fast distribution point unit (DPU) that supports up to 24 subscribers in a single DPU. HFR’s solution leverages Sckipio’s award-winning G.fast technology and internal distributed vectoring capability to deliver the highest performance available on the market today.

“G.fast is a global technology, and Sckipio is surely the market leader,” said a spokesperson from HFR. “Together we are developing solutions that will transform the South Korean, Japanese and other large Asian markets by upgrading the old VDSL2 infrastructure to ultrafast broadband using G.fast.”

The HFR solution is optimized to deliver up to 500Mbps per subscriber while co-existing with 30a profile VDSL customers and utilizes Sckipio’s chipsets to achieve unsurpassed G.fast port density.

In June 2016, SK Broadband President Yin-Chan Lee publicly announced the intention to provide gigabit Ethernet speeds of up to 500Mbps with two strands (one pair) of existing copper telephone lines in old apartments via G.fast. This was in response to the certification of G.fast by the national technical standard established by the RRA, the South Korean National Radio Research Agency.

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

Read more ...