Escalation To Manual Maintenance; Alarm Conditions - Nortel DMS-100 Series Maintenance Manual

REX maintenance records
The system generates a maintenance record from a REX test. This report
indicates results of recent REX tests for each LCM entered. This information
is available at the PM level of the MAP display for a posted LCM.

Escalation to manual maintenance

When automatic maintenance fails to correct a fault in the DMS switch, the
DMS switch provides problem indicators. These indicators reveal that a fault
condition is present. Alarms are examples of trouble indicators. Some OMs
and logs indicate a fault condition and a failure of automatic maintenance.
Manual action is necessary as maintenance personnel attempt to clear the fault
at the MAP terminal. Refer to the chapter Troubleshooting chart for a
procedure on how to clear alarms. Refer to the chapter OPM related logs for
log information. Refer to the chapter OPM related operational measurements
for operational measurements information.

Alarm conditions

The maintenance system status header on the MAP display screen indicates
alarm conditions for the DMS-100 switch subsystems. The alarm conditions
and the meanings appear in the following table.
Table 11 Alarm description
Alarm
Minor
Major
Critical
The type of alarm present and the alarm severity appear under the header.
When several alarms are present, the most severe alarm appears. When this
alarm is cleared, the next most severe alarm appears. When an alarm condition
is not present, a dot (.) appears under the header PM. The PM system is
completely in service when an alarm condition is not present.
Note: After a reload restart, the system erases the maintenance record for
each LCM.
MAP
display
(blank)
(M)
(*C*)
DMS-100 Family OPM Maintenance Manual ISN07 (TDM)/SN07 (DMS) and up
Description
Normally does not affect service
Normally indicates a condition that threatens to
degrade service
Normally indicates a service outage or potential
service outage
Functional overview 2-71