Lucent Technologies AT&T 7400B - Manual (Page 41)

DEFINITY Communications System CHAPTER 5: TROUBLESHOOTING
7400B Data Module
User’s Guide Page 5-1
CHAPTER 5: TROUBLESHOOTING
This chapter describes procedures for troubleshooting most problems
that may be encountered while installing, configuring, and operating the
7400B Data Module.
HOW TO USE THIS
CHAPTER Use the following guidelines to isolate and correct a problem:
1.
2.
3.
4.
Scan through the “Symptom” column in the chart to find the
description that best describes the problem situation you have
encountered.
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.
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 7400B Data Module is in the command mode,
simply type the command; from data mode, do the following:
a. Type the escape sequence (+++) to enter command mode;
the data module will respond with OK or 0 (unless the Q1
option has been set to disable result codes).
Type the suggested command line (if the solution suggests
disconnecting the call, type the command line
ath [ Enter ]).
To return to data mode after using the escape sequence to enter
command mode, type the command line
ato [ Enter ].
b.