Bell Labs Hit the net Speed Record of 10Gbps over Copper Telephone Lines

Alcatel-Lucent’s research arm Bell Labs have “hit data transmission speeds of up to 10Gbps using traditional copper telephone lines”, a development that could reduce the amount of expensive fibre optic cable needed to boost internet speeds in cities.

Bell Labs


Bell Labs hit speeds using copper cables previously only available to fibre optic links


“It will enable operators to provide internet connection speeds that are indistinguishable from fibre-to-the-home services, a major business benefit in locations where it is not physically, economically or aesthetically viable to lay new fibre cables all the way into residences,” said Bell Labs’ owner, Alcatel-Lucent.

“Instead, fibre can be brought to the curbside, wall or basement of a building and the existing copper network used for the final few metres.”

However, the scientists also said that the tech would not increase the net speeds for some other users especially in rural areas.

“The problem that rural properties have is that they are usually very far away from the nearest telephone exchange – you can usually measure it in miles,” said Chris Green, principal technology analyst at the Davies Murphy Group consultancy.

“The speed jumps that Bell Labs have managed to achieve drop away at much shorter distances.

“In order to get any of these speeds you would need to be close enough to your exchange – or fibre optic cable connected to it – that you could pretty much throw a stone at it from your door.”

To reach the higher speeds, Bell Labs said a team of engineers at its Antwerp, Belgium offices is relying on a new DSL standard known as G.fast, which promises speed up to 1Gbps over copper phone lines. Bell Labs has developed a technology- XG-Fast built on the existing G.Fast specification.

“When it becomes commercially available in 2015, G.fast will use a frequency range for data transmission of 106MHz, giving broadband speeds up to 500Mbps over a distance of 100 meters,” Alcatel-Lucent said.

“In contrast, XG-FAST uses an increased frequency range up to 500MHz to achieve higher speeds but over shorter distances. Bell Labs achieved 1Gbps symmetrical over 70 meters on a single copper pair. 10Gbps was achieved over a distance of 30 meters by using two pairs of lines (a technique known as ‘bonding’). Both tests used standard copper cable provided by a European operator.”

Alcatel Lucent hopes this new technology will accelerate deployment of high-speed internet by “taking fibre very close to customers without much delay and costs associated with entering every home.”

Via : BBC