Hot copper: Bell Labs attains 10Gbps broadband speeds

Test proves copper can deliver 1Gbps symmetrical broadband, says Alcatel Lucent

Bell Labs, the research arm of networking company Alcatel-Lucent, has achieved broadband speeds of 10 gigabits per second over copper phone lines, setting a new record. The test demonstrates how existing copper networks can be used to deliver 1Gbps symmetrical broadband, according to Alcatel-Lucent.

It’s a feather in the cap for proponents of fibre-to-the-node, which relies on copper for the 'last mile' connection to premises. In Australia, the Coalition government has pushed FTTN as the main technology for delivering the National Broadband Network.

NBN Co has previously purchased VDSL2 vectoring technology from Alcatel-Lucent. The government-owned company is currently conducting large-scale FTTN testing in conjunction with Telstra.

In the recent round of tests Bell Labs achieved 1Gbps symmetrical speeds over 70 metres on a single copper pair. The testers also achieved 10Gbps over a distance of 30 metres by using two pairs of lines, a technique called bonding. Both tests used standard copper cable provided by a European operator.

Bell Labs cautioned that results might be different in real-world conditions.

“In practical situations, other significant factors that can influence actual speeds (not taken into account during these tests but which have been studied extensively elsewhere) include the quality and thickness of the copper cable and cross-talk between adjacent cables (which can be removed by vectoring),” an Alcatel-Lucent statement said.

“Achieving 1Gbps 'symmetrical' services – where bandwidth can be split to provide simultaneous upload and download speeds of 1Gbps – is a major breakthrough for copper broadband.

“It will enable operators to provide Internet connection speeds that are indistinguishable from fiber-to-the-home services, a major business benefit in locations where it is not physically, economically or aesthetically viable to lay new fiber cables all the way into residences. Instead, fiber can be brought to the curbside, wall or basement of a building and the existing copper network used for the final few meters.”

Bell Labs used a prototype technology called XG-FAST. It is an extension of G.fast technology, a new broadband standard currently being finalised by the International Telecommunication Union (ITU) that is expected to be available in 2015.

Adam Bender covers telco and enterprise tech issues for Computerworld and is the author of dystopian sci-fi novels We, The Watched and Divided We Fall. Follow him on Twitter: @WatchAdam

Follow Computerworld Australia on Twitter: @ComputerworldAU, or take part in the Computerworld conversation on LinkedIn: Computerworld Australia

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Tags FTTNBell Labsfibre to the nodevectoringspeednbn covdsl2NBNbroadbandcopperalcatel-lucent

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3 Comments

Greg

1

I will believe in FTTN when they do a real world test and show results from a node to a home 400 m away like my home is from the connection point is going to be.
All this result shows is theological speeds not the real world practical speeds.
So after 10 months of the FTTN they have nothing to show for real world usage. When in fact FTTN has been around for years. They had a trial at some shopping centre that was 100 m away from the node *yawns*. This is just a PR stunt by Alactel to flog the lies about FTTN, just so they can flog more networking cabinets, as you have to be living within 200 m to receive the "legislated 25MBPS" Turnbill / Abbott promise. In reality most of us will have only 10mbps as we live over 200 m from the node. Just like the false ADSL2 speeds that proise 12 mbps but in reality deliver far less speeds.
By 2020 FTTN technology will be obsolete and need upgrading not to mention the cost for maintaining these boxes. I just hope they keep manufacturing these nodes in 15 years time if not the FTTN will die.

jw

2

My home (in a well established metropolitan suburb) is over 4km from the node. Transmission via copper is useless if you don't improve the node network, which no-one in power has ever suggested.

Unimpressed

3

10gbs - over a distance of 30 meters, and with two lines. So really an incremental improvement over 10gb ethernet?

Back in the real world, the 70 meters from the node @ 1gbps will basically mean the two houses on either side of the node. Tough luck for the rest of you.

Next up: an ignorant Sydney radio jock will trumpet this as a vindication of FTTN and their clueless listeners will believe them.

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