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Exchanging data with another computer
Determining the COM port
Your modem is connected to one of the computer’s COM
(communications) ports. The default setting for the modem is
COM3.
The following procedure is intended to support you if you need to
either upgrade your modem or reset the port to the default settings.
DEFINITION: Although the terms are often used
interchangeably, the serial port and COM port are really two
different things. The serial port is the physical port on the
back of the computer. The COM port is a unique identifier the
computer uses to communicate with the serial port or other
serial devices.
If you’re having trouble connecting through the modem, you may
need to determine the current COM port name and possibly
change it.
To find out which port your modem is connected to:
1 Click Start, and click Control Panel.
Windows XP opens the Control Panel.
2 Double-click Phone and Modem Options.
NOTE: The Control Panel window must be set to Classic
View to access the Phone and Modem Options icon.
Windows XP displays the Phone and Modem Options
Properties dialog box.
3 Click the Modems tab.
Your modem should be listed next to one of the computer’s
COM ports.