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New approaches to structuring the transport layer of telecommunications networks can lead to significantly enhanced capabilities at the same time as reducing network operating costs. Proposals for a network transport layer based upon a series of narrow-band, wide-band, and broad-band digital cross-connects are presented. Together with a central automated network management facility, these permit the rapid provisioning of facilities and "slowswitched" broad-band and wide-band Services. An experimental system, based on a novel transwitching format and structure, is described.