User`s guide

Appendix C USB Configuration Guide
USB Cables
Quantum DAT 160 User’s Guide 66
USB Cables 3
USB cables are available in a variety of lengths. The maximum cable
length is 5 meters. If you need to place a USB device further than 5 meters
from the system, you must use a hub.
Do not use USB cable extenders or couples. These are not recognized or
approved by the USB organization. The USB specification does not allow
their use and they are likely to reduce the reliability of the USB network
or cause it not to work completely.
Internal and external USB devices use the same USB cables.