By David Meyer ZDNet.co.uk
Posted on ZDNet News: Mar 17, 2009 8:10:45 AM
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 'vectorized' 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 vectorized 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 vectorized VDSL2 tests produced aggregated rates of more than
500Mbps over a distance of 500 meters, with six lines bonded into one
cable bundle.
Read more...
http://news.zdnet.com/2100-9595_22-279180.html
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