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Modem
For additional information, please also refer to Appendix C,
and Appendix D, S-registers.
Problem
Communication
software can't initialize
modem
You can hear a dial
tone but can't make a
call
You place a call, but a
connection can't be
made
After making a call you
can't hear a ring
Communication is cut
off unexpectedly
A CONNECT display is
quickly replaced by NO
CARRIER
Character display
becomes garbled
during a communication
session
User's Manual
Procedure
Make sure the computer's internal modem
settings are correct - please refer to the Phone
and Modem Options link within the Windows
Control Panel.
If the call is going through a Private Branch
Exchange (PBX), take care to ensure that the
communication application's tone dial detection
feature is disabled.
You are also able to use the ATX command -
please refer to Appendix C,
further information.
Make sure that the settings are correct within
your communication application.
Ensure that the communication application's tone
or pule dialling selection feature is set correctly.
You are also able to use the ATD command -
please refer to Appendix C,
further information.
The computer will automatically cut off
communication when connection with the carrier
is not successful for a set time interval - try
lengthening this time interval within your
communication application.
Ensure that the communication application's
error control feature is set correctly.
You are also able to use the AT\N command -
please refer to Appendix C,
further information.
When transmitting data you should ensure that
the parity bit and stop bit settings correspond
with those of the remote computer - you should
check the flow control and communication
protocol settings within your communication
application.
Troubleshooting
AT Commands
AT Commands
for
AT Commands
for
AT Commands
for
8-17
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