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21CN - built on robust foundations

Even though it is a world first, 21CN will be built on robust foundations. This table shows just some of the testing that BT is conducting:

Built on robust foundations image

A comprehensive trial and testing programme is underway, for example.

  • More than 193 million calls have been successfully carried over an IP trunk network link between central London, Woolwich and Cambridge

  • More than 600 trialists tested end to end calls between MSANs

  • Voice quality testing is demonstrating perceptual equivalence with 20CN

  • BT expects the vast majority of customer equipment to work in the same way with 21CN.  A comprehensive testing programme of CPE is underway.

  • Already we have proved that 150,000 customer lines can be migrated in one week, providing confidence in BT’s customer migration processes

  • BT continues to enhance its 21CN testing capabilities with the installation of world class testing facilities at Adastral Park and in Swansea

BT is working closely with communications providers, manufacturers and industry bodies to test systems, services and customer equipment to ensure full interoperability with 21CN and service excellence for customers.