btds L Co Last Tear Down Reason

This attribute reflects the last tear down reason for a connection (LCo). In many cases this displays the reason for a momentary service interruption. This attribute applies to the last path failure only. If a path is no longer up, this may give an indication to the reason that the path has failed. In many cases an alarm will also be generated with more specific information. The following is a brief description of the reasons: none - This path has no information for the teardown this is typical of a path provisioned with no remoteName that has not been up. normalShutDown - This path has gone down due to normal call termination. insufficientTxLcOrBandwidth - At present there is either no available bandwidth or logical channel numbers available on one or more of the trunks for this path in the transmit direction. insufficientRxLcOrBandwidth - At present there is either no available bandwidth or logical channel numbers available on one or more of the trunks for this path in the receive direction. trunkFailure- A trunk on the path has failed or has gone down due to a provisioning change of a critical attribute. trunkCardFailure- A trunk FP card has failed along the path. accessCardFailure- The FP on which the peer access service was running has failed. operatorForced- The path has terminated due to the operator locking a trunk along the path. lostLcnClash- The path has terminated because the PA's at both ends of an intermediate trunk have allocated the same LC to different calls. When this happens both calls must go down and then try to come up again a fraction of a second later (effectively ensuring that they will now be assigned different LC's). It is normal to get the odd clash especially when the PA's usedLC is approaching the PA's maxLC. networkCongestion - The path has failed due to control information being lost and not recoverable. trunkNotFound - Occurs on a manual path usually. Check for trunks not up or names provisioned incorrectly. farEndNotFound - The far end is not provisioned or is not up. Check remote Name. wrongModuleReached - This may occur on a manual path. Check provisioning for correct trunk and service names. For a normal path, the network Topology may be changing check remoteName. farEndBusy - The far end has been reached but it is busy. Check remoteName and remote end provisioning. callLoopedBack - This LCo is provisioned to call itself. Re- provision since this is invalid. unknownReason - The failure was not resolved. farEndNotReady - The remote end was reached but the connection was refused due to the remote end not being enabled. remoteNameMismatch - The remote end has alarmed and rejected this setup due to remoteName provisioning. serviceTypeMismatch - The remote Service Type does not match this service type. Check provisioning. reconnectFromFarEnd - The remote end re-established this connection. Check the remote end lastTearDownReason to determine the real reason. bumped - Another call bumped this path from a trunk to get bandwidth (or an LC) which it required to come up. This other path had a higher setupPriority than this path's holdingPriority hence it was allowed to steal the bandwidth (or LC) from this path. optimized - This call has been rerouted due to the optimization feature. The call is still active this just indicates why the path changed. trunkOrFarEndDidNotSupportMode - This call was unable to complete because a mode required by the service was not supported by one of the trunks the route went through or by the far end service it connected to. Currently the only mode that this applies to is the map/mux mode on TRUNK PA ATM component. Map mode was required by the application (CES/FrAtm etc.) but was not available on the TRUNK PA ATM component through which the call was routed or the far end CES/FrAtm component did not specify the same mode.