Infrastructure News

VDSL2 Vectoring in Tunisia

08 April, 2013
ICT Africa Writer
April 08, 2013

In a recent article on Africa mobile versus wi-line we discussed how panellists at the Innovation Africa Digital summit in Ethiopia were playing down the role of wire-line networks in Africa. We advised that the development of wire-line networks should continue side by side with mobile networks because of the long term impact of wire-line networks in priceless. We mentioned Ethio Telecom as one African operator who was focused on increasing the penetration of ADSL lines in Ethiopia. This week, Tunisie Telecom is in the news for innovation that improves the speed of their copper networks.

Working with Alcatel Lucent, Tunisie Telecom is doing trials on ADSL2 vectoring.
Vectoring is a technology which is used to cancel noise in VDSL systems and when used in conjunction with channel bonding technology, can enable VDSL2 networks to support download speeds of up to 100 Mbps. Alcatel-Lucent and other system houses have indicated that the technology provides operators with a large copper footprint a means of increasing broadband data rates without having to deploy fibre all the way to the home.

In Tunisia, the field test with Tunisie Telecom saw the transmission of 100-Mbps signals downstream over a distance of 600 m, with upstream rates of 40 Mbps. The trial used the Alcatel Lucent’s ISAM 7302 platform.

We must point out that squeezing high data rates out of copper is worthwhile for the incumbent telecommunication operator who already has a copper network. For green field deployments, it does not make much sense to deploy copper. The cost of deploying a green field network is heavily dominated by the cost of civil works, making the deployment of fibre, with almost endless bandwidth, all the way to the home or building more attractive.


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