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Ericsson has successfully demonstrated data-transfer speeds of more than 500Mbps over copper, the communications company said on Monday.
The data-transfer rates were achieved using a version of digital subscriber line (DSL) technology called 'vectorised' VDSL2, Ericsson said in a statement. The technology, also called 'crosstalk cancellation', provides such high transmission rates through a twisted pair of copper cables by reducing the noise coming from other pairs in the same cable bundle. VDSL2 has traditionally offered speeds of around 100Mbps.
According to Ericsson, a benefit of vectorised VDSL2 lies in improved power management and lower power consumption, as the lines in a cable are decoupled in terms of interference. Claiming that the technology can work on existing copper lines, the company is pitching it at enterprise users and residential ISPs, as well as telecommunications companies building backhaul for mobile networks.
VDSL2 is a technology that some, such as BT, have mooted as a part of a nationwide, fibre-to-the-cabinet, next-generation access rollout. In this scenario, fibre connectivity would go as far as the street cabinet, while VDSL2 would then provide a high-speed connection between the cabinet and the customer premises. In August 2008, the telecoms regulator Ofcom said this approach could make 50Mbps connections a reality for the majority of the country.
Ericsson's vectorised VDSL2 tests produced aggregated rates of more than 500Mbps over a distance of 500 metres, with six lines bonded into one cable bundle.
"This demonstration confirms Ericsson's leadership in broadband-access technology and our commitment to the continued research and development of DSL technology to improve operators' business with new access solutions," said Ericsson's chief technology officer, Håkan Eriksson, in the statement. "It also proves Ericsson's abilities to provide future mobile backhauling, which will enable quick and cost-effective introduction of long-term evolution (LTE) solutions."
Ericsson also said in its statement that vectorised VDSL2 could be used by operators to "enhance fibre-access deployments with copper access in the last mile and thereby maximise the reuse of existing infrastructure".
While standards for VDSL2 and line bonding have already been established, vectoring will be standardised by the end of this year, Ericsson claimed in its statement.
A breif search of this technology sheds a bit of light on the jargon ...
it seems that the technology only improves the bandwidth of the cables when they are bundled together, as the bundling of them tends to reduce the bandwidth in the first place.
theres no such improvment for single lines, and it needs equipment at each end of the bundled cable.
this means that the distance from the exchange to the junction box can be much longer, and as the cable from the junction box to a home may well be a single cable the restrictions on length may well be more relaxed than previously from the exchange.
you might see a 2-3 times increase in total distance.
Virgin are already rolling that out across the country, some area's already have it.
500mb would be mental, I can't see what i'd ever need something so quick for, besides TF backups to computer. 20mb line is plenty quick enough for things like mmorpg file downloads and the the likes.
There's little point in having a connection quite that fast, as there would be little
chance the backend would have the same speed, you'd only get the download speed
of your destination anyway,
It's good news for backbone infrastructure, and exchange to cabinet i suppose...
Ericsson claims 500Mbps speeds over copper
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