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21CN - 21st Century Network
Date Posted: 21 July, 2009 | Views: 1013 | Article ID: 60
The name BT has given to its "next-generation" telephone network platform, which does away with much of the old PSTN (Public Switched Telephone Network) in favour of an IP (Internet Protocol) based one. Rollout should be completed by 2011.

http://www.btplc.com/21CN/


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