3Com 3CP5610A User Manual page 43

Internal ISA Modems 37
Possible solution:
You may be using a COM port address that is either already in use or not
configured correctly. To work properly, this modem needs to be assigned
to a free COM port.
Windows 2000 Make sure your COM port is not already in use by
another modem. Click Windows Start, Settings, and Control Panel,
and then double-click Phone and Modem Options. Click the Modems
tab. Look for another modem already in the machine. If there is another
modem listed, check which COM port it is using. If a previous modem is
already using the available COM port, you can either use another COM
port or uninstall the previously installed modem. See your previous
modem's manual for uninstallation instructions.
Next, make sure that your COM Ports are configured correctly. Right-click
the My Computer icon on your desktop. Click Properties. Click the
Hardware tab. In the "Device Manager section", click the Device
Manager button. Look under Ports (COM & LPT). If the COM Ports have
yellow exclamation points or red Xs over them, your COM ports may be
configured incorrectly. If this is the case, you may need to contact your
computer manufacturer.
Windows 95/98 Make sure your COM port is not already in use by
another device. Click Windows Start, Settings, and Control Panel, and
then double-click Modems. Look for another modem already installed in
your computer. If there is another modem installed, click the Diagnostics
tab to find out which COM port it is using. If a previously installed
modem is already using the available COM port, you should uninstall that
modem. See your previous modem's manual for uninstallation
instructions.
Right-click the My Computer icon on your desktop. Click Properties.
Click the Device Manager tab. Double-click Ports (COM & LPT). If the
COM Ports have yellow exclamation points or red Xs over them, your
COM ports may be configured incorrectly. If this is the case, you may
need to contact your computer manufacturer.
Windows NT Turn off your computer and remove your modem.
Restart and click Windows Start, Settings, and then Control Panel.
Double-click the Ports icon. Your modem must be jumpered to a COM
port setting that does not appear in this list.