1-13
PROBLEMS AND SOLUTIONS
This chapter provides a number of examples of
Problems (P:)
,
Causes (C:)
, and
Solutions (S:)
. If your modem is not functioning
properly, look up the problem here, or ask your dealer to get the
technical assistant.
P: The modem does not respond to AT commands.
C:
The COM port that you set for the modem may be used by
another card in the computer already.
S:
Change the COM port for the Fax/Modem PC Card to another
unused port. It might be better to set the COM port to COM3:
or COM4:. Refer to Appendix B for choosing a new COM
port. Even if you are not using the serial port which is set to the
same COM port as the modem, it can still interfere with the
modem. Be sure to update your software COM port setting as
well.
C:
The Interrupt that the modem is using may be the same as
which another card is using.
S:
Change the IRQ settings to a different unused one. Refer to
Appendix B for choosing a new IRQ. Even if you are not using
a serial port which is set to the same IRQ as the modem, it can
still interfere with the modem. Be sure to update your software
COM port setting as well.
P: The modem does not execute the command line.
C:
Make sure you do type
AT
at the beginning of command
line.
C:
Make sure the modem is not in data mode. Type
+++
to escape
to command mode if necessary.
C:
Make sure your software is set to the same COM port as the
modem is.
P: The modem does not give a response after an AT command
was
executed.
C:
The echo and/or responses may be turned off by the
ATE0Q1
commands. Use
AT&V
to check that.
S:
Use
ATE1Q0
then press
Enter
to change them back.
C:
Make sure the modem is in command mode instead of data
mode when you type the AT command. Type
+++
to escape to
