| 摘要 |
A PVC management system in each of ATM switches is disclosed. Each of the ATM switches includes a pair of an incoming header translator and an outgoing header translator, which are provided for each line. The incoming header translator and the outgoing header translator are controlled to provide a working PVC and a protection PVC which are associated with different transmission lines, wherein the working PVC and the protection PVC are selectable under control of a network management system.
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