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national tendered for the replacement of its uk network because bt was able to ... offer an easily expandable network ... a three-year period the legacy system ­ offering mostly low-speed point-to-point links ... at quicker speeds · faster turn over of customers · reduced cost but higher ... secure bookings how it works bt mpls offers `any site-to-any site communication bt ... line frame relay or atm services it offers differentiated performance levels and ... prioritisation of delay and non-delay sensitive traffic ... ­ all on a single network bt offers the following class of service network ... across its network · application class 1 voice an any-site-to-any site ip ... service level guarantees · application class 2 premium an any-site-to-any site ... service level guarantees · application class 3 standard an any-site-to-any site ...