ITU-T has completed the specifications necessary for
telecoms operators around the world to offer a ‘super’ triple play of video,
Internet and voice services.
The ITU-T Recommendation for very-high-bit-rate digital
subscriber line 2 (VDSL2) will allow operators worldwide to compete with cable
and satellite operators by offering services such as high definition TV (HDTV),
video-on-demand, videoconferencing, high speed Internet access and advanced
voice services including VoIP, over a standard copper telephone cable.
VDSL2 will offer consumers up to 100 Mbps up and downstream,
a massive ten-fold increase over the more common ADSL. Essentially it allows
so-called ‘fibre-extension’ bringing fibre like bandwidth to premises not
directly connected to the fibre-optic segment of a telecoms company’s network.
As well as addressing increasing consumer demands, VDSL2
offers telecom carriers a solution that promises to be interoperable with the
ADSL kit that many operators already have in place. This interoperability will
make the migration of customers to VDSL2 much simpler. Another important
feature of VDSL2 is that it will work in both legacy ATM networks and next
generation IP based networks.
VDSL2 is seen by many operators as an ideal accompaniment to
a fibre to the premises (FTTP) rollout, where for instance fibre is supplied
direct to an apartment block and from there copper cable is used to supply
residents with high-speed VDSL2.
Yoichi Maeda, chairman of the Study Group responsible for
the work said: “We have leveraged the strengths of ADSL, ADSL2+, and VDSL to
achieve the very high performance levels that you will see with VDSL2. It looks
set to become an extremely important feature of the telecommunications
landscape and is a landmark achievement for our members, many of whom were
relying on this Recommendation in order to take their businesses to the next
The publication of
standardized specifications in an ITU-T Recommendation (G.993.2) means that
operators can avoid being locked into a single vendor. As well as the economic
advantages that this may bring it also means that operators can select the best
solutions according to their needs.