AT&T 3.0 manual Maintenance Strategy

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.

User or

One or more alarms turn on:

❑ Attendant Alarm LED

AT&T-authorized personnel

reports a problem

phone

Discuss problem

❑ Processor LED

1a

❑ Supplemental alert

problem

with the source

1b

❑ Status display

1a

Troubleshoot

telephone

I

1a

(Chapter 3)

Maintenance or programming

All

Problem persists

accessed just before

Check

other

error(s) occurred

problems

Inconclusive

permanent errors

Check error logs

in error logs

Check Access Log

1b (Chapter 2)

2a

(Chapter

2)

Inconclusive

(Chapter 2)

2c

Errors

Can’t access

Problem gone;

error logs

verify that errors

I Can’t access error Iogs

do not recur

1

I

Errors

2a

Troubleshoot errors

Troubleshoot power supply

(Table 2-1, “Error Codes”)

2 b

(Chapter 4)

Corrective action per Table 2-1

Problem persists

Troubleshoot power supply first (if indicated)

3

(Chapter

4)

Troubleshoot processor

Power supply OK: problem persists

2 b

(Chapter 4)

Troubleshoot processor (if indicated)

Problem

persists

4

(Chapter 4)

Processor OK; problem persists

Troubleshoot

carrier

2b

(Chapter 4)

5

Troubleshoot

modules

(Chapter 4)

Problem

persists

Modules OK; problem persists

6

Troubleshoot carrier

Escalate to NSAC

(Chapter 4)

or AT&T-authorized dealer

Carrier OK: problem persists

2 b

Troubleshoot trunks

7

(Chapter 5)

Trunks OK: problem persists

Escalate to

NSAC

or AT&T-authorized dealer

8

Troubleshoot central office

Problem persists

(Chapter 5)

9

Figure 1-7. Maintenance Strategy

1-18Introduction