D-Link ENW-3503, User Manual

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5 Q & A
PLANET ENW-3503 User's Manual 5-1
5. Q & A
This chapter provides a number of examples of Questions (Q:),
Causes (C:), and Answers (A:). If your modem is not
functioning properly, look up the problem here, or ask your
dealer for technical assistance.
Q:The modem does not respond to AT commands.
C:The COMx: port that the modem is set to may be used by
another card in the computer already.
A:Change the COMx: port of the PC CARD FAX/MODEM
modem to a different unused port. It might be best to set it to
COM3: or COM4:. Even if you are not using a serial port
which is set to the same COMx: port as the modem, it can
still interfere with the modem. Be sure to update your
software COMx: port setting as well.
C:The Interrupt that the modem is using may be the same
Interrupt that another card is using.
A:Change the IRQ settings to a different, unused, 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.
Q:The modem does not execute the command line.
C:Make sure you are typing 'AT' at the beginning of command
line.
C:Make sure the modem is not in Data Mode. type +++ if
necessary.
C:Make sure your software is set to the same COMx: port as
the modem is.
Q:The modem does not give a response after an AT
command was executed.