ATT System 25 Installation And Maintenance Manual
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MAINTENANCE ERROR MESSAGE AND DESCRIPTIONPOSSIBLE SOLUTION Trunk Call Dropped: A call thatNormally, no action required; had been up on a trunk for morehowever, ifproblem persists, than 9 hours has been detectedperform trunk test call per Trunk by an audit and dropped. TheTroubles procedure in this Part. port associated with the errorAlso, check the CO disconnect identifies the trunk in question.and trunk timing. Trunk Call Too Long: An auditThis error is removed when a found a call that had been up on a“Trunk Call Dropped” error is trunk for more than 5 hours andlogged. Normally,no action is logged this error to alert the userrequired, and system will recover of it.in 4 hours. However, if a problem does exist, check the associated trunks per Figure 4-3. Also check for a trunk to trunk call. Unable To SendDown-linkIf problem persists, check or Message:Down-link messagereplace CPU/Memory CP. queueis full. This condition means that messages to CPs may be lost. UnexpectedCommand:Recoverable; no action required. (STARLAN Interface CP) This error is anisolated transient condition. Unexpected interrupt: (STARLANNormally, no action required; Interface CP) This error is anhowever, if this error occurs too isolated transient condition.frequently, a permanent alarm will be generated and the CP should be checked. 4-45
MAINTENANCE ERROR MESSAGE AND DESCRIPTIONPOSSIBLE SOLUTION Unrecognized Command:Recoverable; no action required. (STARLAN Interface CP) This error is anisolated transient condition. User Forced Warm Start: SystemRecoverable; no action required. was warm started through the SAT. Warm Start: Power supply may be out of System was restarted for someregulation (see Figure 4-2). Check reason; translations are okay.remaining errors in the alarm tables for associated problems. Wink Too Short For Valid Signal:Check equipment at far end to For a delay dial or wink startensure that it is working and outgoing trunk, if the wink from translated properly per Figure 4-3. the far end is less than the minimum 100 ms, this error is generated. The tie trunk remains waiting for a valid signal. Work Cycle Interrupt Test Failed:Try to warm start the system Work cycleinterrupt problem. through the SAT. If the problem System most likely is stopped.persists, check or replace the CPU/Memory CP. 4-46
MAINTENANCE . . Figure 4-2.ClearingSupply Troubles (Sheet 1 of 2) 4-47
MAINTENANCE Figure 4-2.Clearing Power Supply Troubles (Sheet 2 of 2)
MAINTENANCE Figure 4-3.Clearing CO Trunk Troubles 4-49
MAINTENANCE Figure 4-4.Clearing 4-Wire Tie Trunk Troubles (Sheet 1 of 4) 4-50
MAINTENANCE Figure 4-4.Clearing 4-Wire Tie Trunk Troubles (Sheet 2 of 4) 4-51
MAINTENANCE Figure 4-4.Clearing 4-Wire Tie Trunk Troubles (Sheet 3 of 4) 4-52
MAINTENANCE Figure 4-4.Clearing 4-Wire Tie Trunk Troubles (Sheet 4 of 4) 4-53
MAINTENANCE NOTES : 1. PC should be running NAUCOM, Session, CAM and/or any STARLAN NETWORK compatible emulating program. 2. The green LED lights when the STARLAN CP passes power up. Figure 4-5.Clearing STARLAN Interface Troubles