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CHAPTER 5: TROUBLESHOOTING DEFINITY Communications System
7400B Data Module
Page 5-4
User’s Guide
Symptom
Problem
Solution
The PC communications The data module has
software indicates that the
ignored the on-to-off
call has been transition of the DTR
disconnected, but the
lead.
DATA LED remains lit.
at&d2
[ Enter ]
The data module has
ignored the H (hang-up)
command.
From command mode, type the
command
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.
Ensure that after the escape
sequence
(+++)
has been entered to
switch the data module to
command mode, an adequate pause
is allowed before issuing the H
command. In escaping to
command mode with the result
codes enabled, the data module
must be given time to return OK or
0 before it is ready to accept a
command.