Alcatel-Lucent conducts G.fast trial with Telecom Austria

Created September 13, 2013
Applications and Research

Telecom Austria subsidiary A1 has tested out a new technology from Alcatel-Lucent that aims to provide optical fibre speeds over the copper telephone network. In a field trial on installed lines, the broadband operator achieved data rates of over 1 Gbps over a distance of 70m.

G.fast is a new standard, still several years from completion, that is being developed to provide higher speeds using electronic frequencies above 30 MHz combined with vectoring (crosstalk cancellation in bundles of copper wires). It provides 500Mbps over very short distances, up to 100m.

A1 says it is expecting to use G.fast in fibre-to-the-building (FTTB) deployments, installing the new equipment in the basement of a multi-tenant building and using the building’s existing telephone wiring to carry broadband signals to individual apartments. The operator says the deployment will complement its existing fibre-to-the-cabinet (FTTC) roll out.
 
A1 was also an early adopted of Alcatel-Lucent’s vectoring technology, which it started to put into operation on its FTTC network last year.

The trial, conducted with a Bell Labs prototype, first tested G.fast over a single, good quality cable, achieving a maximum speed of 1.1 Gbps over 70m  and 800 Mbps over 10m. On older unshielded cables, which are typical of most in-building cabling in Austria, speeds of 500 Mbps over 100m were achieved over a single line. When a second line was introduced, creating crosstalk between the two, the G.fast speed fell to only 60 Mbps. Vectoring was then enabled, removing the crosstalk and bringing the speed back up to 500 Mbps over 100m.

“While this is only a trial, the impressive results show the enormous potential of G.fast for service providers around the world”, said Federico Guillen, head of the wireline business unit at Alcatel-Lucent. “G.fast is currently undergoing standardization and will be commercially available in the coming years.”

The ITU reported this month that the G.fast standard, Recommendation ITU-T G.9700, which specifies methods to minimize the risk of G.fast equipment interfering with broadcast services such as FM radio, has passed through the first stage approval process, paving the way for G.fast to be approved in early 2014.
 
By Pauline Rigby
 
See Also: 
Press release: With G.fast Austrian Subsidiary A1 Achieves Data Rates of Over 1 Gbit/s via the Existing Copper Network for the First Time
Press release: ITU Readies New 1Gbit/s Broadband Standard

alcatel-lucent-conducts-g-fast-trial-with-telecom-austria

This article was written
by Pauline Rigby