35b for Germany, bonding for AT&T/BT advertising. Vague claims of "up to 100% improvement" don't tell me what the result will be for most customers, which is what engineers reading this need to know. I doubt the 35b chips are delivering the 250 megabits down Broadcom salesmen promised customers for delivery about a year ago, but they haven't released data. On 35b, everyone in the industry is waiting to find out whether the tweaks to VDSL really will double downstream speeds. We need test results.
The desire for these chips is clear, if they deliver as hoped. Germany's DT and England's BT calculated the cost of all the field terminals in the original plans for G.fast and, the financial side of the companies balked. England's choice was to squeeze everything they can from existing terminals, increasing distances far beyond the ~100 meters in the original G.fast design. In their early testing, they are shooting for 330/50 to many homes with what I call G.halffast.
To get 200-300 megabits to millions of other homes, they will need to bond two lines. Broadcom has now announced home modem chips designed for bonding. Meanwhile, the CEO of BT has been bragging about getting to 1 gigabit; bonding will make that more common.
AT&T has been the strongest voice for G.fast actually reaching 1 gigabit. Suddenlink is already offering 1 gig cable and Comcast soon to offer a gig to 40 million homes, AT&T feels they at least have to be able to advertise the gig. AT&T told Wall Street they think they can compete with the 45 megabits of much of U-Verse and they don't intend to offer high speeds to more than a quarter of their homes this decade. Fiber to the press release, we call it.
Deutsche Telekom is using a slightly upgraded vectored VDSL (35b( to save money. It uses 35 MHz instead of the 17-30 MHz of the current VDSL. The industry is calling this 35b after the standard. Alcatel calls it VPlus. Speeds will probably be 100-150 megabits down on short loops; they are hoping for 200 megabits but that isn't proven. 35b, unlike G.fast, is compatible with existing 17 MHz VDSL systems. That allows DT to leave 10 million+ now obsolete VDSL lines in place and slow down the overall upgrade.
No surprise Deutsche Telekom is going for the least expensive way to upgrade. Deutsche Telekom is under severe financial pressure. They only covered their dividend in one of the last four years. They lost billions, probably tens of billions, on computer services. They lost billions more taking over much of Eastern Europe, especially Greece. Billions more on T-Mobile in the United States, which will probably need $10B to buy spectrum next year. They are far behind many other telcos in LTE and faster landlines because they've underinvested. Meanwhile, cable is killing them in the 2/3rds of Germany covered by cable.
All telcos know cable will soon be offering gigabits but most decided not to match the speeds. That risks losing customers and is essentially a bet that consumers won't care about the difference between 100 megabits and a gigabit. Results are unproven, but cable has reason to smile as BT, DT & Telecom Italia choose not to build aggressively.
Here's the pr.
Broadcom Raises the Bar for Ultrafast Broadband Copper Networks
Industry's First Commercial Silicon Support for New VDSL2 35b and G.fast Bonding Standards
LONDON, Oct. 19, 2015 /PRNewswire/ -- Broadband World Forum 2015 – Broadcom Corporation (BRCM), a global innovation leader in semiconductor solutions for wired and wireless communications, today announced VDSL2 35b and G.fast bonding support for two new protocols under development in the International Telecommunication Union (ITU). With support for these new standards, Broadcom is enabling DSL network operators with a long-term roadmap for competitive high-bandwidth services with minimal investment to their physical plants. For more news, visit Broadcom's Newsroom.
For operators with a significant investment in Fiber to the Cabinet (FTTC) architectures, the new 35b protocol is an optimal solution to leverage the benefits of VDSL2 vectoring at higher data rates. By engineering the tone structure of 35b to remain consistent with the field-proven VDSL2 17a protocol, this new standard increases aggregate DSL performance by up to 100 percent, without disturbing widely-deployed G.Vector crosstalk cancellation technology. Broadcom is the first commercial silicon supplier to support the new standard with an end-to-end solution in production today, via the previously-released BCM63138 integrated residential gateway and BCM65235 Central Office DSP.
"We are pleased to see the industry responding to operators' requests for a high-bandwidth roadmap for cabinet architectures, "said Greg Fischer, Broadcom Senior Vice President and General Manager, Broadband Carrier Access. "Broadcom's quick introduction of end-to-end technology in support of 35b will have a very meaningful impact in time-to-service for this important new protocol."
For operators working from a multi-dwelling unit (MDU) or distribution point unit (DPU) network architecture, the new G.fast protocol remains a compelling alternative to avoid or defer the expense of installing fiber directly to the home. To maximize the distance over which multi-gigabit copper services may be delivered, the ITU recently developed a multi-line bonding amendment to the G.9701 standard. By aggregating multiple copper pairs into a single logical link, bonding provides a path to increase rates well beyond 1Gbps, an important objective for many providers in competitive broadband markets. Broadcom is supporting an end-to-end solution for G.fast bonding utilizing the existing BCM65244 Central Office DSP with the newly-released BCM65249 bonded CPE PHY device.
"As customer appetite for gigabit broadband increases, we are looking at all available tools to economically deliver these service rates," said Mu-Piao Shih, Chunghwa Telecom President. "With Broadcom's strong commitment to the G.fast standard, including the new G.fast bonding standard, we are seeing the potential to deliver a cost-effective, long-term gigabit roadmap for copper networks."
Broadcom's BCM63138, BCM65235, BCM65244, and BCM65249 are all in production.
Broadcom Corporation (BRCM), a FORTUNE 500® company, is a global leader and innovator in semiconductor solutions for wired and wireless communications. Broadcom® products seamlessly deliver voice, video, data and multimedia connectivity in the home, office and mobile environments. With one of the industry's broadest portfolio of state-of-the-art system-on-a-chip solutions, Broadcom is changing the world by Connecting everything®. For more information, go towww.broadcom.com.
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