Maintenance overview 1-75
DMS-100 Family OPAC Maintenance Manual XPM12 and up
REX maintenance records
The system generates a maintenance record from a REX test to indicate
results of recent REX tests for each LCM you enter. This information is
available at the PM level of the MAP display for a posted LCM.
Note: Following a reload restart, the system erases the maintenance
record for each LCM.
Escalation to manual maintenance
When automatic maintenance fails to correct a fault in the DMS-100 switch,
the DMS-100 switch provides trouble indicators. These trouble indicators
indicate a fault condition.
Alarms are examples of trouble indicators. Several OMs and log reports
indicate a fault condition and a failure of automatic maintenance. Manual
intervention becomes necessary as maintenance personnel attempt to clear
the fault at the MAP terminal.
Alarm conditions
The maintenance system status header on the MAP display indicates alarm
conditions for DMS-100 subsystems. The alarm conditions and meanings
appear in the alarm description table.
Alarm description
Alarm
MAP
display
Description
Minor (blank) normally does not affect service
Major (M) normally indicates a condition that threatens and
degrades service
Critical (*C*) normally indicates a service power failure or potential
service power failure
The type of alarm present appears under the header with the alarm
importance.
If several alarms are present, the most important alarm appears. When
maintenance personnel clear this alarm, the next most important alarm
appears.
When an alarm condition is not present and the PM system is in-service, a
dot (.) appears under the header PM.
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