mscVctDcType 1.3.6.1.4.1.562.36.2.1.5130.3.10.1.6

This attribute specifies the type of Vc call: switched, permanentMaster, permanentSlave, permanentSlaveWithBackup, permanentBackupSlave, spvcMaster, spvcSlave, spvcSlaveWithBackup, spvcBackupSlave. If the value of this attribute is set to switched then the remote end must also be provisioned as switched. No information at the remote end is defined about this switched interface. If the value is set to permanentMaster, then a permanent connection will be established between 2 ends. The remote end must be defined as a permanentSlave, permanentBackupSlave or permanentSlaveWithBackup. The connection cannot be established if the remote end is defined as anything else. The end defined as permanentMaster always initiates the calls. It will attempt to call once per minute. If the value is set to permanentSlave then a permanent connection will be established between 2 ends. The remote end must be defined as a permanentMaster. The connection cannot be established if the remote end is defined as anything else. The permanentSlave end will attempt to call once per minute. If the value is set to permanentSlaveWithBackup then a permanent connection will be established between the two ends. The remote end must be defined as a permanentMaster. The connection cannot be established if the remote interface end is defined as anything else. The permanentSlaveWithBackup end will attempt to call once per minute. When type is set to permanentSlaveWithBackup connection will be cleared if interface becomes unavailable. This enables a retry of the connection which can be redirected to permanentBackupSlave. If the value is set to permanentBackupSlave then a permanent connection will be established between the 2 ends only if the permanentMaster end is disconnected from the permanentSlaveWithBackup end and a backup call is established by the redirection system. If the permanentSlaveWithBackup interface becomes visible again, the permanentBackupSlave end is disconnected and the permanentSlaveWithBackup end is reconnected to the permanentMaster end. The permanentBackupSlave end does not try to establish pvc call. If the value is set to spvcMaster, then a permanent connection will be established between two ends, with resiliency at the NNI(s), if the connection transits across two or more networks. The remote end, which may be in the same network, or an external network that is reachable via Frame Relay NNIs, must be defined as either a spvcSlave, spvcBackupSlave or spvcSlaveWithBackup. The connection cannot be established if the remote end is defined as anything else. The end defined as spvcMaster always initiates the calls. It will attempt to call once per minute. The call is attempted by the spvcMaster, and accepted by the remote end, only if all three of the following conditions are satisfied at both ends: 1. The datalink layer must be operational 2. The LMI procedures must be in normal condition (i.e. no service affecting condition) 3. If the LMI side attribute is provisioned to both, the A-bit received from the interface must be Active. If the LMI side attribute is not provisioned to both, this condition does not apply. After a call is cleared, the end defined as spvcMaster attempts to retry the call according to the rule for the clear cause. If the call is cleared or rejected due to the failure of one of the three conditions indicated above, or due to unavailability of resources along any point in the connection path, the call will be retried after 60 seconds. For all other causes, such as loss of service at an NNI, the call will be retried immediately. If the value is set to spvcSlave then a SPVC connection will be established between two ends. The remote end must be defined as a spvcMaster. The connection cannot be established if the remote end is defined as anything else. The spvcSlave end never attempts to call. If the value is set to spvcSlaveWithBackup then a SPVC connection will be established between the two ends. The remote end must be defined as a spvcMaster. The connection cannot be established if the remote interface end is defined as anything else. Unlike a permanentSlaveWithBackup end, the spvcSlaveWithBackup end never attempts to call. If the value is set to spvcSlaveWithBackup, the connection will be cleared if the interface becomes unavailable. This enables a retry of the connection by the spvcMaster end, which may be redirected to an end that is set to spvcBackupSlave. If the value is set to spvcBackupSlave then a SPVC connection will be established between the two ends only if the spvcMaster end is disconnected from the spvcSlaveWithBackup, end and a backup call is redirected by the call redirection system. Unlike the permanent connection, if the spvcSlaveWithBackup interface becomes available again, the spvcBackupSlave end is not disconnected and the spvcSlaveWithBackup end is not reconnected to the spvcMaster end. Neither the spvcBackupSlave nor the spvcSlaveWithBackup end try to establish a SPVC call.