User's Guide

8400B Plus Data Module User’s Guide 555-020-709
Issue 2
November 1996
Troubleshooting
4-5
How to Use This Chapter
The PC
communications
software indicates
that the call has
been disconnected,
but the green LED is
still on.
The 8400B Plus
Data Module has
ignored the
on-to-off transition
of the DTR lead.
From command mode, type the
command
AT&D2
to set the DTR lead option to
disconnect on DTR lead transition from
on to off. Alternatively, determine and
use the command provided by the
communications software to implement
this change.
The 8400B Plus
Data Module has
ignored the H
(hang-up)
command.
Ensure that after the escape sequence
(
+++) has been entered to switch the
8400B Plus Data Module to command
mode, an adequate pause before and
after the
+++ is allowed before issuing
the
H command. In escaping to
command mode with the result codes
enabled, the 8400B Plus Data Module
must be given time to return
OK
or
0 before it is ready to accept a
command.
The speakerphone
does not turn on
when a voice call is
dialed.
Incorrect option
settings.
Change the
Automatic Speakerphone
Activation
option to Yes .
The speakerphone
turns on when a
voice call is dialed,
but dial tone and
touch-tones are not
heard.
Incorrect option
settings.
Change the
Immediate Speakerphone
Activation
option to Yes .
Table 4-1. Troubleshooting Guidelines
Symptom Problem Solution
ENTER
020709_2.book Page 5 Friday, April 23, 1999 5:39 AM