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

Light Green: Incumbent likely:  France, Germany, 

10-Downing-1805%-10% disparity between ECI & Huawei. Tests in December show Huawei VDSL DSLAMs in Britain have a mean download speed of 32.6 Mbps. ECI DSLAMs measure 30.5 Mbps. The chart below, by Andrew Ferguson of ThinkBroadband, has a series of readings over time that are fairly consistent. Ferguson notes, "Huawei has been slightly ahead since July 2016 after years of being neck and neck." He goes on to speculate the difference may be due to the implementation of G.INP, a very fast error correction method. Broadcom introduced G.INP years ago with some fanfare, but the results were very modest. I had heard things had improved, so this data doesn't surprise me. Andrew writes me he will also be watching the lower target noise margins  BT is testing. They now use 6dB but will be testing 3, 4, 5dB. These are log scales, so even a few dB makes a difference. Lab tests suggest a significant speed increase.

VDSL is now a fairly mature technology, especially the unvectored variety BT is using. or 35b are newer, so discrepancies are more likely. VDSL manufacturers who had inferior products should have fixed things by now. Most vendors spend their development dollars on new products, so I was pleasantly surprised to see Huawei continues to improve the product.

At Huawei's Tokyo Broadband Forum, I was amazed at the range of their new products. Their research budget is ~$10B and increasing. That's more than their two closest rivals, Nokia and Ericsson, combined. They seem to be spending the money wisely.

Besides the large dataset, Ferguson looks for possible other explanations (confounding variables.) That should be basic for any analysis and earns him extra credibility. 

Speed test Comparison for VDSL2 tests on ECI and Huawei cabinets
DateMedian Download
Mean Download
Median Download
Mean Download
Dec 2016 27.8 30.5 31.4 32.6
Nov 2016 28 30.5 31.3 32.5
Oct 2016 27.5 30.1 30.8 31.9
Sep 2016 27.2 29.5 30.2 31.4
Aug 2016 27.7 30.2 30.4 31.7
Jul 2016 28.7 31.2 31 32.2
Jun 2016 28.6 30.5 30.6 31.5
May 2016 28.2 30 30.5 31.3
Apr 2016 27.8 29.6 29.7 30.5
Mar 2016 27 28.7 28.9 29.8
Feb 2016 27 28.9 29.3 30.2
Jan 2016 27.1 28.8 29.1 29.9
Dec 2015 27.5 29 29.1 29.8
Nov 2015 27.4 29 28.9 29.9
Oct 2015 26.1 27.3 26.6 27.5
Sep 2015 26.3 27.5 26.5








The Site for gfast 230 News
A remarkable 400 people attended the very strong Broadband Forum BASE events in Berlin and Las Vegas. Trevor confirmed BT would pass the million this year. Cioffi projected “Waveguide DSL” could carry 10 gigabits a kilometer as well as a terabit 100 meters. Werner sees a 4X improvement in upstream with cDTA. Much more in next issue.

Deutsche Wants a Gigabit, Finally Realizes 50 Meg Isn't Enough
Deutsche Telekom is finally realizing that 50 megabit DSL won't make it against gigabit cable. VP Franz Seiser is blunt. "We must change radically, become disruptive and, above all, throw away things," he proclaims at BBWF. After years of DT insisting 50 megabits is plenty, we now hear "it is about Gigabit products" from DT's Robert Soukup.  
    A lucky building in Frankfurt will receive 500+ megabit service as ultra-conservative Deutsche Telekom experiments with Soukup told BBWF, "We're going to have a field test in Frankfurt with and Fiber To The Building (FTTB.) We will know by the end of the year if this is the right way to go." Hint to Soukup: Yes it is. is working well at a dozen telcos I;ve talked to.
     The details are surprising. DT is going for CORD, Open Source, Calix, and Radisys.

*** The new Telebyte Guide to Testing Gfast follows the Broadband Forum IR-337 Gfast test specification, the same used by the University of New Hampshire (UNH-IOL) for Gfast certification testing. Free download (ad) It is the best technical guide to  I have seen. Grab it. Dave

1.6 Gig in Sckipio-Calix Test
A telco tells me they are getting impressive early results from the Calix 48 port DSLAM with the new Sckipio 212 MHz chips. There still is work to do but this is encouraging. 
    Carriers want DSLAMs with more than 16 ports to reduce the deployment costs from the basement or larger field cabinets. Speed matters to the marketing side of the company; AT&T's CEO believes he must offer a true gigabit to match cable. (They've been getting ~750 megabits with first generation chips.

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Reverse Power 4 Port DSLAM for Australia
Australia is connecting 1M homes to, some with a Netcomm distribution point mini-DSLAM. It's a small unit designed for pole or pit mounting. It's waterproof, pressure proof, and temperature resistant. Their matching home modem is bittorrent friendly, with two USB ports for a hard drive dedicated to sharing.
     A reverse power unit at the customer, the NDD-0100-01, can save the cost of bringing power to the DSLAM. They don't expect many orders until the second half of 2018, as nbn is waiting for the second generation chips. Netcomm demonstrated RP with BT Openreach in August.

*** Sckipio's Three advances are taking to the next level. (ad)

Australia Makes it Official: to Million Plus
No news here. In September, 2015, I reported Australia's nbn Going This June. I reported the million home fiber to the curb (kerb?) was beginning. Unfortunately, they are no closer to figuring out where to find the needed $10B to $20B to cover the cost overruns. Instead, the parties are battling in Parliament about who is to blame.

2 Bonded 212 Lines = 3 Gigabits
Sckipio at BBWF is demonstrating 3 gigabits down, nearly a gigabit up, over two phone lines, bonded. Twice the bandwidth (212 MHz instead of 106 MHz) times two lines is fast. Sckipio does great demos; at CES, they showed first generation chips delivering almost 1 gig upstream.
    “Sckipio is pushing Gfast to astonishing speeds with production silicon,” CEO David Baum proclaims. Calix is using the SCK23000 chipset in their 48 port gig+ DSLAM at the show.

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