Apple eMac 2005 - Manual (Page 25)

Chapter 3 Using Your Computer 25
Using Multiple USB Devices at the Same Time
If all of your USB ports are being used and you want to connect more USB devices,
you can purchase a USB hub. The USB hub connects to an open USB port on your
computer and provides additional USB ports (usually four or seven). Most USB hubs
also have a power adapter and should be plugged into an outlet.
Note: If you’re using a chain of USB devices and hubs, some USB devices may not work
when connected through a combination of USB 2.0 high-speed hubs and USB 1.1 full-
speed or low-speed hubs. For example, you may not see an external USB hard drive on
your desktop. To avoid this problem, do not connect USB devices with different speeds
together. Connect your high-speed hub directly to your computer and connect high-
speed devices to it. Connect a full-speed or low speed hub directly to your computer
and connect similar speed devices to it.
For More Information on USB
Additional information on USB is available in Mac Help (see page 22).
Choose Help > Mac Help and search for “USB.” You can also find information
on the Apple USB website at www.apple.com/usb.
For information on USB devices available for your computer, check the Macintosh
Products Guide at www.apple.com/guide.
USB hub
LL298586J.book Page 25 Thursday, March 10, 2005 9:49 AM