IBM Preferred USB Keyboard with Hub User Manual page 10

With your computer on and the Preferred Keyboard plugged in and operating,
plug the other USB devices you wish to use into the port on the keyboard.
Follow the instructions on your screen.
For more information on how to configure and use the other devices with your
Keyboard, see the User's Guides that come with those other devices.
Understanding device-usage guidelines
Before you begin using devices connected to the Keyboard, be sure to note the
following device-usage guidelines:
v Do not activate resource-intensive devices at the same time because USB
limitations might cause a degradation in the performance and the speed of
the devices. For example, do not start a USB scanner while you are using a
USB camera. Instead, close the application for the camera; then start the
scanner.
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Preferred USB Keyboard with Hub: User's Guide