Monitoring Performance Indicators; Operational Measurements; Log Reports; Alarms - Nortel DMS-100 Series Maintenance Manual

7-2 Star Remote System manual maintenance

Monitoring performance indicators

The first step in locating faults is to examine the performance indicators the
system routinely generates. The existence of fault conditions is indicated by
operational measurements (OM), log reports, and alarms.

Operational measurements

OMs are a data collecting system that tracks certain types of events and how
often they occur. The OM data give an overall indication of performance and
usage and are an excellent means for detecting both actual and potential
system troubles. The OM thresholding feature should be used to monitor and
report key STAR activity. These reports should be made routinely (daily or
weekly) and should be the primary method of trouble detection. See Extended
Peripheral Module Operational Measurements Reference Manual,
297-8321-814 for more information about the OMs that are specific to the Star
Remote System.

Log reports

Logs, used primarily as an analysis tool, provide detailed information on call
errors, diagnostic results, and system status. They are also good indicators of
trouble conditions, especially when any of the following conditions exist:
•
•
•

Alarms

Audible and visual alarms indicate that something requires corrective action.
Proper performance of routine system maintenance and use of OMs and logs
should minimize the occurrence of alarms.
Alarm severity and corresponding urgency for corrective action is indicated by
the level of the alarm, and is expressed as minor, major, or critical. The
following table describes alarm conditions.
Table 7-1 Alarm description
Alarm
Minor
Major
Critical
297-8353-550 Standard 05.01 March 2001
sudden increase in volume of logs
message-not-printed reports
large number of similar logs
MAP display
(blank)
(M)
(*C*)
Description
Usually non-service affecting
Usually indicates a service-degrading condition
Usually indicates a service outage or potential
service outage