Abstract: Provided is a time correction system which includes a means for performing time correction of time in an operational system device by obtaining standard time information from outside with the operational system device among the devices in the cluster to be a representative device and a means for performing time correction of time in a standby system device having the operational system device as a master and the standby system device as a slave, in which the standby system device obtains time information of the operational system device. The operating state of each device is synchronously controlled so as to set the operational system device as a representative device and also the operational system as a master and the standby system as a slave when there is a change recognized in the operating state, which enables to switch the processing corresponding to the setting.

Abstract: For establishing an S-PVC (soft private virtual connection) connection in a PNNI (private network-network interface) network of a plurality of peer groups, each of which includes at least an ATM (asynchronous transfer mode) switching apparatus as an ATM node, a first identifier and first designated route data associated with the S-PVC channel are set in each of the plurality of peer groups. In the ATM node in each of the plurality of peer groups, a call originating request including second designated route data and a second identifier is received and the first identifier and the second identifier are compared. A next call originating request containing third designated route data as the second designated route data and the second identifier is generated for a next node based on the first and second designated route data and the second identifier when the first identifier and the second identifier are coincident with each other. The next call originating request is transmitted to the next node.

Abstract: Provided is a time correction system which includes a means for performing time correction of time in an operational system device by obtaining standard time information from outside with the operational system device among the devices in the cluster to be a representative device and a means for performing time correction of time in a standby system device having the operational system device as a master and the standby system device as a slave, in which the standby system device obtains time information of the operational system device. The operating state of each device is synchronously controlled so as to set the operational system device as a representative device and also the operational system as a master and the standby system as a slave when there is a change recognized in the operating state, which enables to switch the processing corresponding to the setting.

Abstract: For establishing an S-PVC (soft private virtual connection) connection in a PNNI (private network-network interface) network of a plurality of peer groups, each of which includes at least an ATM (asynchronous transfer mode) switching apparatus as an ATM node, a first identifier and first designated route data associated with the S-PVC channel are set in each of the plurality of peer groups. In the ATM node in each of the plurality of peer groups, a call originating request including second designated route data and a second identifier is received and the first identifier and the second identifier are compared. A next call originating request containing third designated route data as the second designated route data and the second identifier is generated for a next node based on the first and second designated route data and the second identifier when the first identifier and the second identifier are coincident with each other. The next call originating request is transmitted to the next node.