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Ignitionnet · 22-09-2008, 22:05

21CN in itself is a migration to an all IP/MPLS backbone, removal of the legacy ATM network, removal of System X, etc, and connection of all customers to MSANs which route voice calls via soft switches.

One of the things this migration allows is the release of the WBC interconnect product, and with it ADSL2+ over BT Wholesale network as they can carry it over pure IP rather than having to backhaul over ATM.

The main driver behind 21CN is as popper said to save remove legacy systems and have a single lower maintenance IP network. It's costing BT billions to do the migration but they anticipate cost savings of 10 figures a year.

22-09-2008, 22:05	#6
Ignitionnet Inactive Join Date: Jun 2008 Location: Leeds, West Yorkshire Age: 47 Posts: 13,995	Re: 21ST CN and Virgin Media 21CN in itself is a migration to an all IP/MPLS backbone, removal of the legacy ATM network, removal of System X, etc, and connection of all customers to MSANs which route voice calls via soft switches. One of the things this migration allows is the release of the WBC interconnect product, and with it ADSL2+ over BT Wholesale network as they can carry it over pure IP rather than having to backhaul over ATM. The main driver behind 21CN is as popper said to save remove legacy systems and have a single lower maintenance IP network. It's costing BT billions to do the migration but they anticipate cost savings of 10 figures a year.