Maintenance Strategy - AT&T MERLIN LEGEND Release 3.0 Installation 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
1a
Troubleshoot
1a
2a (Chapter 2)
Problem gone;
verify that errors
do not recur
2a
3
4
5
6
7
8
Figure 1-7. Maintenance Strategy
1-18 Introduction
User or
reports a problem phone
problem with the source
telephone
(Chapter 3)
All
Problem persists
other
problems
Check error logs
Inconclusive
Can't access error Iogs
I
Errors
Troubleshoot errors
(Table 2-1, "Error Codes")
Corrective action per Table 2-1
Troubleshoot power supply first (if indicated)
(Chapter 4)
Power supply OK: problem persists
Troubleshoot processor (if indicated)
(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:
Discuss problem
1b
1a
I
Maintenance or programming
accessed just before
error(s) occurred
Inconclusive
Check Access Log
(Chapter 2)
Errors
2c
Troubleshoot power supply
2 b
2 b
Troubleshoot carrier
2b
or AT&T-authorized dealer
2 b
or AT&T-authorized dealer
Problem persists
9
Attendant Alarm LED
Processor LED
Supplemental alert
Status display
Check
permanent errors
in error logs
(Chapter 2)
1b
Can't access
error logs
1 I
(Chapter 4)
Problem persists
Troubleshoot processor
(Chapter 4)
Problem persists
(Chapter 4)
Problem persists
Escalate to NSAC
Escalate to NSAC