User's Guide

Troubleshooting
4-1
How to Use This Chapter
8400B Plus Data Module User’s Guide 555-020-709 Issue 2
November 1996
8400B Plus Data Module User’s Guide 555-020-709 Issue 2
November 1996
4
Troubleshooting
This chapter describes procedures for troubleshooting most problems that may
be encountered while installing, configuring, and operating the 8400B Plus Data
Module.
How to Use This Chapter
Use the following guidelines to isolate and correct a problem:
1. Scan through the “Symptom” column in the chart to find the description
that best describes the problem situation you have encountered.
2. In the “Problem” column, one or more problem descriptions is offered.
Select the one that best describes the observable condition, or try each
suggestion in turn until the trouble has been corrected.
3. Perform the task described in the “Solution” column. In cases where you
are directed to type an AT command to correct the problem and the
8400B Plus Data Module is in the data mode, simply do the following:
a. Type the escape sequence (+++) to enter command mode; the
8400B Plus Data Module will respond with
OK or 0 (unless the Q1
option has been set to disable result codes).
b. Type the suggested command line. If the solution suggests
disconnecting the call, type the command line
ATH
ENTER
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