Comms Alliance revises VDSL2 and vectoring standards

The Communications Alliance, through a working committee, will revise four co-regulatory instruments and develop a brochure to include arrangements for using VDSL2 and vectoring

The Communications Alliance will help facilitate the rollout of a fibre-to-the-node (FTTN) National Broadband Network (NBN) by revising industry standards around VDSL2 and vectoring.

VDSL uses copper for the 'last mile' connection to premises, but delivers faster speeds than the more common ADSL/ADSL2 broadband connections.

Vectoring improves VDSL (very-high-bit-rate DSL) performance by removing crosstalk interference by continuously analysing the noise conditions on copper lines. It then creates a new anti-noise signal to cancel it out, much like noise-cancelling headphones.

Huawei says VDSL2 can achieve speeds of 50Mbps within 300m of the node. Meanwhile, it says VDSL2 that uses vectoring can achieve speeds of 100Mbps within 300m of the node.

The Communications Alliance, through a working committee, will revise four co-regulatory instruments and develop a brochure to include arrangements for using VDSL2 and vectoring.

John Stanton, Communications Alliance CEO, said while a standard already has provisions for VDSL2, an industry code had not yet been developed around the deployment of the technology.

“Given that vectoring has emerged only recently as a workable technology to boost data speeds via FTTN, neither our co-regulatory Code nor the Australian Standard yet encompasses it,” Stanton said.

“The revision of Codes and Standards to facilitate new technologies and new policy directions is an important part of ensuring that Australian industry is equipped to realise the planned changes to the way the NBN is rolled out.”

VDSL2 and vectoring is used around the world to boost the speed of broadband connections that use copper.

The Australian Financial Review reported Telstra kicked off a VDSL vectoring trial just after the election, but it has said it has not “demonstrated its capabilities to anyone yet”.

New Zealand company Chorus recently launched a wholesale VDSL-based offering as an interim solution while fibre-to-the-premises is rolled out in areas covered by NZ's Ultra-Fast Broadband (UFB) program.

Chorus will also offer it in areas where FTTN has been deployed as part of the Rural Broadband Initiative (RBI).

In the United Kingdom, BT has also announced it is testing deploying vectoring.

Tags vectoringNational Broadband Network (NBN)vdsl2fibre-to-the=-node (FTTN)

More about Australian Financial ReviewAustralian Financial ReviewBT AustralasiaHuaweiTelstra Corporation


Martin Hamilton


I am very much looking forward to the costing. Going by the German and US experiences, it could well be $20 billion+ just for vectoring.



The values in this article are test lab values.

In the real world as shown by iiNet's heat map of sync rates only 10% of users get 19mbps and above with ADSL2+ annex M.

This is because real world copper is crap. Its thin gauged, with bridge taps, batteries and other junk littering the runs.

Half the time the pairs in the pits, exchanges, and MDFs aren't even labelled. How many times have you seen a ULL with dial tone, i can say its not unusual.

The fact of the matter is that the nodes are going have be within at least 100-200m (basically at the Pits/pillars) to make this work.

No way that you could do that for $20b. (and the vast majority of that is for crappy semi-rural and country people).

Not enough to wire up the cities to that spec which will force the government (unless they're bunch of liars) to roll out with fibre.

Next 6-12 months is gonna be interesting considering that the libs have promised to finish this thing in less then 3 years.

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