Sprint´s evolution to broadband ISDN

One telecommunications company´s-Sprint´s-transformation of their infrastructure architecture away from dedicated transmission facilities and toward high-bandwidth virtual facilities which will enable customers to construct transmission networks that can be reconfigured almost instantaneously is described. Sprint´s current X.25, frame-relay, switched circuit, and private line services are reviewed. The evolving architecture that will, on a moment´s notice, enable a customer to redirect his traffic among the networks as well as to dynamically expand and contract transmission bandwidth to any of the networks is discussed. The architecture will be based on frame-relay permanent logical links at the end of 1992 and move to ATM cell-based access in 1994 to 1995.<>