Maintenance Strategy - AT&T MERLIN LEGEND Release 3.1 Maintenance And Troubleshooting Manual

Maintenance Strategy

Maintenance Strategy

The maintenance strategy presented in this section is only a guideline, not a
fixed procedure. Refer to Figure 1–7 whenever you are uncertain as to how to
proceed. As you become more experienced with maintaining and
troubleshooting the system, you will most likely develop your own strategy.
AT&T-authorized personnel
reports a problem
1a
Troubleshoot telephone
(Chapter 3)
1a
Problem persists
Check error logs
(Chapter 2)
2a
Problem gone;
verify that errors
do not recur
2a
Troubleshoot power supply first (if indicated)
3
Troubleshoot processor (if indicated)
4
5
6
7
8
Figure 1–7. Maintenance Strategy
1–18
Introduction
User or
Discuss problem
Phone
with the source
problem
1a
Maintenance or programming
All
accessed just before
other
error(s) occurred
problems
Check Access Log
Inconclusive
(Chapter 2)
2c
Can't access error logs
Errors
Troubleshoot errors
(Table 2-1, "Error Codes")
Corrective action per Table 2-1
(Chapter 4)
Power supply OK; problem persists
(Chapter 4)
Processor OK; problem persists
Troubleshoot modules
(Chapter 4)
Modules OK; problem persists
Troubleshoot carrier
(Chapter 4)
Carrier OK; problem persists
Troubleshoot trunks
(Chapter 5)
Trunks OK; problem persists
Troubleshoot central office
(Chapter 5)
One or more alarms turn on:
Attendant Alarm LED
Processor LED
Supplemental alert
Status display
1b
Check
permanent errors
Inconclusive
in error logs
(Chapter 2)
1b
Errors
Can't access
error logs
Troubleshoot power supply
(Chapter 4)
2b
Problem persists
Troubleshoot processor
(Chapter 4)
2b
Problem persists
Troubleshoot carrier
(Chapter 4)
2b
Problem persists
Escalate to NSAC
or AT&T-authorized dealer
2b
Escalate to NSAC
or AT&T-authorized dealer
Problem persists
9