AT&T 3.0 manual Isolating the Trouble, Check Telephone Problems, Check the Error Logs

Maintenance Strategy

Isolating the Trouble

You can isolate any problem to one of the following areas:

■Telephone

■Control unit

■Central office

NOTE:

If you change the jack assignment of any telephone, be sure to record the extension jack change on Form 2a, System Numbering: Extension Jacks. See Appendix B, “System Numbering Forms,” for details.

Check Telephone Problems

If a customer reports telephone problems, use the following steps as a guideline for determining the possible cause. Chapter 3, “Telephone Problems,” discusses telephone problems in more detail.

1Discuss the problem with the user who reported the problem.

2Run the appropriate test to verify the complaint.

3Replace the telephone with one that works properly.

4If the problem persists, go to “Checking the Error Logs” below.

5If the problem persists, replace the telephone wiring.

Check the Error Logs

If a system alarm turns on (see the top-right area of Figure 1-7),begin troubleshooting by checking the permanent errors in the error logs.

Use the following steps as a guideline to check the error logs. For more information on performing the procedures, see “Checking the Error Logs” in Chapter 2. Also, when you check the error logs, you should refer to Table 2-2, “Error Codes,” in Chapter 2 for a detailed description of each problem.

Introduction 1-23