Making Connections Connecting External Devices To connect a serial device The computer includes a standard 9-pin serial port that you can use to connect devices such as external modems and fax modems. If needed, you can set the serial port’s address in the BIOS Setup utility. • Connect the device’s serial cable to the computer’s serial port. To connect an audio device Your computer includes a built-in microphone (just in front of the blue sleep button) that you can use to record voice, sound, and music. You can also plug in a stereo input source (such as a CD player), an external microphone, external speakers, or headphones. CAUTION The audio jacks are three-terminal stereo jacks.
They are not compatible with two- terminal mono plugs. Connecting a mono plug into the speaker-out jack may damage the OmniBook. • Attach the audio cable to the corresponding audio port on the computer. Note When you plug a device into the external microphone port, the built-in microphone automatically turns off. When you plug a device into the audio out port, the built-in speakers automatically turn off. 74 Corporate Evaluator’s Guide