5 — Verifying Your Modem
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If your modem is not installed properly, the set of AT commands will not be listed. You
may also be prompted by an error message, stating that it was unable to open the COM
Port. If this happens,
i)
make sure that there is no communication software (e.g. HyperTerminal, Dial-Up
Networking, etc) running.
ii)
from the Windows desktop, right-click
My Computer
icon. Select
Properties
. From
the
System Properties
, select the
Hardware
tab and click
Device Manager
button.
Check whether there is any yellow exclamation mark on the
Modems
device. If yes,
remove and re-install your modem driver. (See the chapter on
Uninstalling Your
Modem Driver
.)
(The information listed here may
differ from what you see on your
computer.)
You should see a list of AT
commands similar to the one
illustrated. This indicates that your
modem is successfully installed.
Click
OK
.
Click
Query Modem
.
5
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