Maintenance And Troubleshooting; Maintenance - AT&T MERLIN LEGEND Installation & Maintenance Manual

Maintenance and
Troubleshooting

Maintenance

The purpose of maintenance is to detect, report, and clear
problems quickly with minimum disruption of service. To do this,
the system isolates troubles to a single replaceable module
whenever possible.
To isolate problems, the control unit (CU) runs automatic
diagnostic, auditing, and monitoring tests. Errors found by the
automatic tests go into error logs. In addition, demand tests can
be run by using an MLX-20L telephone or a PC with System
Programming and Maintenance (SPM) software.
Notification of trouble comes from users who report problems or
from alarms generated by the system when it detects serious
errors. Alarms can appear as an LED on an operator console
and as a status display on the maintenance terminal.
Maintenance can be done on-site or from a remote location.
Note: You must record any station jack change on the "System
Technician's Run Sheet" (see Appendix L).
Maintenance 5-1