Light Reading

Adtran Offers G.Fast Crosstalk Cure

Carol Wilson
8/14/2014
50%
50%

Adtran today is unveiling a patent-pending approach to enabling the newest form of advanced copper technology -- G.fast -- to more easily co-exist with the VDSL2 technology already being deployed, and thus be brought to market faster and at lower cost by telcos eager to get to near-gigabit speeds over their existing infrastructure. (See Adtran Speeds Up Copper Links With Frequency Division Vectoring.)

Frequency Division Vectoring essentially allows G.fast, which delivers higher speeds over shorter loop lengths, to be added as an over-the-top channel on VDSL, eliminating the crosstalk issues that make the two incompatible over a single copper pair. By enabling that compatibility, Adtran Inc. (Nasdaq: ADTN)'s FDV can allow a telco to get started deploying G.fast where it has loop lengths of 250 meters or less, to deliver close to 1 Gbit/s, without ripping out existing VDSL2 deployments or having to invest heavily in deploying G.fast over an entire service area.

"Vectored VDSL can provide 100 Mbit/s downstream and 40 Mbit/s upstream, so it provides as much capacity for sustained loads as GPON [gigabit passive optical networks]," says Adtran CTO Kevin Schneider. "Now a carrier can also use G.fast with dynamic crosstalk avoidance at speeds up to 500 Mbit/s over short lines."

G.fast, which is still an evolving standard at the ITU, increases speed over copper lines by using wider frequency profiles than those used by VDSL2, operating on 106MHz and at some point promising to operate at 212MHz. VDSL2 uses 17MHz or 30MHz bands.


For more coverage of broadband innovation, visit Light Reading's dedicated DSL content channel.


Adtran's FDV technology will be presented to the ITU for inclusion in the standards process later this month, Schneider says. Adtran realizes that for the technology to take hold, it has to be offered by more than one vendor, he adds. But Adtran also hopes to leverage its invention in competing with its prime rivals in access, Alcatel-Lucent (NYSE: ALU) and Huawei Technologies Co. Ltd.

Telcos have to be able to compete with cable companies in the speed wars and have been disadvantaged by the DOCSIS 3.0 technology that let cable deliver speeds up to 100 Mbit/s, the Adtran CTO notes. What the industry is looking for is the ability to bump up speeds as close to one gig as possible, but do so cost-effectively.

What Adtran is proposing allows telcos to take advantage of their existing distribution plant, including aggregation points and deployments of fiber-to-the-building for office towers and multi-dwelling units, he notes. By eliminating the crosstalk issue, Adtran is making the full range of bandwidth available for use by G.fast deployment without disrupting the services already deployed.

— Carol Wilson, Editor-at-Large, Light Reading

(4)  | 
Comment  | 
Print  | 
Newest First  |  Oldest First  |  Threaded View        ADD A COMMENT
kq4ym
50%
50%
kq4ym,
User Rank: Light Sabre
8/18/2014 | 8:27:14 AM
Re: Niche
If it works and is cost effective it surely will be the way for telcos to keep up with the cable guys. The ads are awash with speed as the selling point, and the telco company can now equalize that advantage if the costs are reasonable to do so.
brooks7
50%
50%
brooks7,
User Rank: Light Sabre
8/15/2014 | 12:29:55 PM
Re: Niche
rossc_ie,

You won't get improved results by doing G.fast at the distance that VDSL2 deployed.  The copper network is the limiting factor and that doesn't change as the vectored versions of DSL run pretty close to the Shannon Limits.  

So, the way to get a faster rate is to shorten the loops by moving the Fiber to Copper transition closer to the home.  Which means that you are running Fiber to say 500' from the home instead of 2500' today (which was the original U-Verse Model).  At 500', G.fast has a lot better result.

Now, think through this deployment.  You have to run fiber out to the 500' mark from where it is today and then overlay put the products out at that point.  There will be a crossconnect at the drop point which is where you will want to insert G.fast.  So, to have interference with VDSL2 that means you want to KEEP the older method and then ADD the newer one on top of it.

This seems like not the way the large carriers will work in bulk.  One would be better off converting a neighborhood.  The only way I see this having value is a box that does both G.fast and VDSL2 at the 500' mark.  That would allow the carrier to deploy G.fast and then sell upgrades after the network was upgraded.  That seems like a minority case to me.

 

seven

 
rossc_ie
50%
50%
rossc_ie,
User Rank: Light Beer
8/15/2014 | 7:39:56 AM
Re: Niche
Doesn't seem odd to me. Increasing speeds from thousands of deployed fibre connected VDSL2 street cabinets over the existing copper is a no brainer. Much cheaper and quicker to deploy than FTTH to all premises. 
brooks7
50%
50%
brooks7,
User Rank: Light Sabre
8/14/2014 | 11:46:19 PM
Niche
Carol, This seems like a very niche solution. You would have to want to overlay a very short reach g.fast solution OVER an existing a vdsl2 solution. That means you run fiber into a distribution box and then keep the copper in place beyond it. Seems like a very odd solution. seven
Flash Poll
From The Founder
Anshul Sadana answers questions from Steve Saunders, Light Reading's founder and CEO, about Arista's CloudVision, a global cloud network controller for workload orchestration and workflow automation delivering a turnkey solution for cloud networking.
Live Streaming Video
CLOUD / MANAGED SERVICES: Prepping Ethernet for the Cloud
Moderator: Ray LeMaistre Panelists: Jeremy Bye, Leonard Sheahan
LRTV Custom TV
End-User or Enterprise Benefits to the New IP

7|30|15   |   04:27   |   (0) comments


Andrew Coward discusses what the New IP means to end users or enterprise customers. He explains compelling reasons, including how every customer can get their own network, from the transformation to the New IP.
LRTV Custom TV
Network Visibility & the New IP

7|30|15   |   02:23   |   (0) comments


Mukund Srigopal provides an explanation of what network visibility is and how it is essential as service providers transition to the New IP. In addition, the importance of the network packet broker is discussed.
Between the CEOs
Video Exclusive With Basil Alwan, Alcatel-Lucent

7|24|15   |   26:44   |   (5) comments


Basil Alwan, President of IP Routing & Transport at Alcatel-Lucent, discusses virtualization, cultural challenges, the capex crunch and more with Light Reading founder and CEO Steve Saunders.
LRTV Custom TV
VDF: Enable the Financial With Mobile Money

7|20|15   |   06:53   |   (0) comments


Ian Ravenscroft discusses how operators can expand to occupy the entire digital services value chain through service innovation.
LRTV Custom TV
Telefónica on OSS Transformation

7|20|15   |   06:01   |   (0) comments


Jose Gonzales discusses the details of Telefónica's operation transformation program.
LRTV Custom TV
Judi Achmadi on Huawei's Cloud Storage Solution

7|20|15   |   03:33   |   (0) comments


Judi discusses the key business goals of TelekomSigma's public cloud service and how Huawei's solution helps them address challenges.
LRTV Custom TV
KPN Enlightening Digital Business & IT Transformation

7|20|15   |   06:19   |   (0) comments


Rob de Beer discusses the changes that operators need to make with service innovation now coming from the Internet world.
LRTV Custom TV
Stratus Telco-Grade Cloud Solutions & NFV

7|20|15   |   07:34   |   (0) comments


Ali Kafel from Stratus Technologies addresses high-availability concerns within the telco industry with a solution that enables telcos to provide high-availability and stateful fault-tolerance using a software-based approach.
LRTV Documentaries
The Six Million Dollar Business Man

7|20|15   |   01:52   |   (0) comments


Steve Saunders, publisher. A man barely alive after an acquisition malfunction imploded the company he founded. Gentlemen, we can rebuild Light Reading. Better, faster, stronger.
Between the CEOs
CEO Chat With Anukool Lakhina, Guavus

7|20|15   |   38:51   |   (1) comment


Guavus CEO Anukool Lakhina talks to Light Reading founder and CEO Steve Saunders about the role of operational analytics in the communications services and networking sectors, particularly in relation to IoT.
LRTV Custom TV
IBM's Flash Storage With Intel QuickAssist

7|20|15   |   03:18   |   (0) comments


Intel's Bev Crair and IBM's Eric Herzog discuss how IBM's V9000 Flash Storage System has helped customers around the world. Featuring real-time compression powered by Intel QuickAssist Technology, the V9000 is a next-gen flash storage solution.
LRTV Huawei Video Resource Center
Thailand's AIS: Transforming to an FMC Operator

7|17|15   |   4:53   |   (0) comments


Saran Phaloprakarn, Senior VP of Fixed Broadband Business Management of Thailand's AIS, was a keynote speaker at the first Asia-Pacific Ultra Broadband Summit in Bangkok. In this video, he talks to Heavy Reading about transforming into an FMC (FBB+MBB+Content) operator.
Upcoming Live Events
September 16-17, 2015, The Westin Galleria Dallas, Dallas, TX
September 16, 2015, The Westin Galleria Dallas, Dallas, TX
September 16, 2015, The Westin Galleria Dallas, Dallas, TX
September 29-30, 2015, The Westin Grand Müchen, Munich, Germany
October 14-15, 2015, New Orleans Ernest N. Morial Convention Center, New Orleans, LA
November 5, 2015, Hilton Santa Clara, Santa Clara, CA
December 1, 2015, The Westin Times Square, New York City
All Upcoming Live Events
Infographics
Network operators start seeing savings from NFV in the first year, according to a study by Affirmed Networks and ACG.
Hot Topics
AT&T U-verse TV Hits the Skids
Alan Breznick, Cable/Video Practice Leader, 7/24/2015
Robbins Succeeds Chambers as Cisco Changes CEOs
Mitch Wagner, West Coast Bureau Chief, Light Reading, 7/27/2015
RJio to Launch Its Own 4G Devices Brand
Gagandeep Kaur, Contributing Editor, 7/27/2015
Qualcomm Wants FCC to Stay Out of LTE-U Fray
Sarah Thomas, Editorial Operations Director, 7/27/2015
Like Us on Facebook
Twitter Feed
September 22, 2015
Media Begins With “Me”
Webinar Archive
BETWEEN THE CEOs - Executive Interviews
Basil Alwan, President of IP Routing & Transport at Alcatel-Lucent, discusses virtualization, cultural challenges, the capex crunch and more with Light Reading founder and CEO Steve Saunders.
Guavus CEO Anukool Lakhina talks to Light Reading founder and CEO Steve Saunders about the role of operational analytics in the communications services and networking sectors, particularly in relation to IoT.
Cats with Phones
Distract-a-Cat Click Here
The vibrate function makes for a useful cat distraction.