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2. If you install a USB keyboard that has a mouse connector, the USB keyboard
emulates a mouse, and you will not be able to disable the mouse settings in the
IBM Setup Utility program.
USB cables: Use a 4-pin USB cable to connect external devices to USB connectors.
USB technology transfers data at up to 12 megabits per second (Mbps) with a
maximum of 127 external devices and a maximum signal distance of 5 meters (16
ft) per segment.
USB connectors: See "Input/output connectors" on page 78 for the location of the
USB connectors.
1
4
Table 15. USB-port connector pin-number assignments
Pin
Signal
1
VCC
2
–Data
3
+Data
4
Ground
Audio connectors
The audio connectors are used to connect external audio equipment to the
computer. See "Input/output connectors" on page 78 for the location of these
connectors.
Line in (blue)
Line out (green)
Mic (pink)
Line out: This connector is used to send audio signals from the computer to
external devices, such as powered speakers with built-in amplifiers, headphones,
multimedia keyboards, or the audio Line in connector on a stereo system.
Note: The internal speaker in the computer is disabled when any device is
attached to this connector.
Line in: This connector is used to accept audio signals from external devices, such
as line output from external audio equipment into the computer sound system.
Microphone: This connector is used to connect a microphone to the computer
when you want to record sounds on the hard-disk drive or use speech recognition
software.
Ultra160 SCSI connector
Some computer models come with a SCSI adapter, which supports an Ultra160
SCSI internal channel in a full-featured PCI 2.1-/2.2-compliant bus master package.
This configuration supports zero wait state, 32-bit memory transfers at 160 MB per
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