User's Manual

4-4
Expanding Your Computer
Connecting a Serial Device
Your computer has two serial ports for connecting a serial device such as
a serial mouse or serial communication device (modem).
Follow this procedure to connect a serial device:
1. The serial port is configured as RS232 by default. If you want to use it as
RS422, run BIOS Setup to change the setting.
2. Turn off the computer.
3. Plug the device cable to the serial port on the rear of the computer.
4. Turn on the computer.
NOTE: Portable modems that derive power through the serial port cannot be
used with the computer. Instead, use a modem that is powered by its own internal
battery or external AC power.