Apple Workgroup Server 8150/110 - Manual (Page 56)

Connecting a trackball or other input device
Your server has an Apple Desktop Bus (ADB) port, which you use to connect
the mouse, the keyboard, and other input devices such as a trackball, a bar-
code reader, or a graphics tablet.
You can usually connect up to three ADB devices in a chain to a single port.
The exact number depends on how much power the devices require.
IMPORTANT The total power used by all ADB devices connected to your server
must not exceed 500 milliamperes (mA). Information about the power
requirements of the mouse and keyboard are in the Technical Information
booklet that came with your server. Check the information that came with your
other ADB device for power requirements.
Connecting a microphone
Your server has a sound input port, which you can use to connect a
microphone. With appropriate software, you can use the microphone to give
spoken commands to your server and to record your voice or other sounds.
The Apple PlainTalk Microphone and the software needed for using spoken
commands are available from Apple-authorized dealers. If you want to use
another microphone, make sure it is compatible with your Workgroup
Server 8150.
ADB port icon
ADB port
40 Chapter 3 / Expanding Your Server and Connecting Other Equipment