| 摘要 |
To revert the topology of a network to its original state after a malfunctioned link (34) has been repaired, an Operation Support System (OSS) (22) sends to each of the custodial nodes (4, 8) and the tandem nodes (14, 16, 18) that form the alternate route respective commands to revert the operation that each node had performed during restoration. The OSS (22) identifies the custodial nodes (4, 8) by the fact that those nodes perform more operations than the tandem nodes (14, 16, 18). The operations that were performed during restoration were recorded. Upon receipt from different nodes that the malfunctioned link (34) has been repaired, the OSS (22) sends to each of the nodes (4, 8, 14, 16, 18) a specific command to perform the inverse of the operations that the node had performed during restoration. The custodial nodes (4, 8) are ordered to perform their inverse operations first so that the repaired link (34) once again connects the custodial nodes (4, 8). A path verification process is next performed to ensure the integrity of the repaired link (34).
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