Instruction manual

System Maintenance
If an error that begins as a Transient System Error is verified or reaches a threshold
level of severity, it is reclassified as a Permanent System Alarm.
Transient system errors are stored in the Transient System Error log. The system
can store a combined total of 40 Permanent System Alarms and Transient System
Errors in the error tables.
● Most Recent System Errors:
The ten Most Recent System Errors are recorded by
the system, regardless of their level of severity. These are stored in the Most Recent
System Errors log.
Error Logs
The three error logs can be displayed via the System Administration Terminal. The data in
the log is useful in diagnosing and analyzing troubles, particularly when the problem has not
yet caused an alarm or when alarms cannot be retired by replacement of maintenance
objects.
The error log is historical in nature.
It lists faults that have not been resolved as well as past
alarms, and provides a profile of system maintenance.
Automatic Maintenance Tests
There are two kinds of maintenance testing initiated (only) by the system:
● Periodic
● Demand
Periodic tests are run by the system at fixed intervals.
The tests do not affect service.
Demand tests are run by the system when it detects a condition requiring a need for testing.
Demand tests are only performed when errors are detected.
Maintenance personnel cannot
initiate these tests.
For additional information, see AT&T System 25 Installation and Maintenance Manual.
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