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Digital Cross-Connect Systems in Transport Network Survivability

Document Number SR-NWT-002514
Issue Number 01
Issue Date Jan 1993

    ABSTRACT: The implementation of high-capacity optical transport systems, while providing great economic advantages through multiplexing and
    sharing of transport facilities, also increases the vulnerability of the telecommunications services using these transport facilities.
    Therefore, the capability of telecommunications networks to restore services affected
    by failures is becoming one of the key considerations in designing the broadband network architecture.

    This Special Report (SR) encompasses the results of several studies concerning survivability in the transport networks of Local
    Exchange Carriers (LECs). In particular, this SR presents an overall view of the role of Digital Cross-Connect Systems (DCS's) in
    providing transport network survivability. However, one "working assumption" of this report is that DCS's are not installed merely for
    survivability purposes. Rather, given that DCS's are in place, one of the critical questions addressed in this report is how to best
    protect these DCS's, and furthermore, how to take advantage of the DCS capabilities to restore other failures as well.

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