Trouble Isolation And Correction; Description Of Troubleshooting Procedures; Performance Indicators - Nortel DMS-100 Series Maintenance Manual

Trouble isolation and correction

Description of troubleshooting procedures

Basic troubleshooting procedures consist of the following:

Performance indicators

The first step in how to locate faults is to examine the performance
indicators the system normally generates. Operational measurements (OM),
log reports, and alarms indicate if fault conditions are present.
Operational measurements
The OMs are a system that collects data that track specified events and how
often these events occur. The OM data indicates performance and use. The
OM data can detect both accurate and potential system problems.
The OM thresholding feature can monitor and report key Outside Plant
Access Cabinet (OPAC) activity. Make these reports daily or weekly. These
reports are the primary method of trouble detection.
Refer to XPM OM Reference Manual for more information about the OMs
that are associated with the OPAC.
Log reports
Use logs as an analysis tool to provide detailed information on call errors,
diagnostic results, and system status. Logs can indicate trouble conditions
when any of the following conditions exist:
how to locate and clear faults
fault isolation tests
diagnostic tests
product-specific test tools
sudden increase in volume of logs
message not printed reports
large number of logs that are the same.
DMS-100 Family OPAC Maintenance Manual XPM12 and up
10-1