Toshiba Portege 3500 User Manual page 159

Refer to the online help files for Appendix C and D.
Problem
Communication
software can't
initialise 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
You cannot receive an
incoming call
User's Manual
Procedure
Make sure the computer's internal modem
settings are correct. Refer to Modem Properties
in the Control Panel.
If the call is going through a PBX machine, make
sure the communication application's tone dial
detection feature is disabled.
You can also use the ATX command. Refer to the
online help files for Appendix C, AT Commands.
Make sure the settings are correct in your
communications application.
Make sure the tone or pulse selection in your
communications application is set correctly.
You can also use the ATD command. Refer to the
online help files for Appendix C, AT Commands.
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.
Check the error control setting in your
communications application.
You can also use the AT\N command. Refer to
the online help files for Appendix C, AT
Commands.
In data transmission, make sure the parity bit
and stop bit settings correspond with those of
the remote computer.
Check the flow control and communication
protocol.
Check the rings before auto answer setting in
your communications application.
You can also use the ATS0 command. Refer to
the online help files for Appendix D, S-registers
If problems persist, contact your dealer.
Troubleshooting
9-15