USB virtual desktop (model U170) user guide
Page 9
Connection options
The U170 may be attached to a PC through any USB 2.0 compliant connection method. This
includes the use of USB 2.0 hubs, USB 2.0 extension cables, and USB 2.0 active extenders.
Each segment of a USB connection from device to host, device to hub, or hub to hub, must be
no longer than 5 meters. The USB 2.0 specification states that a total of 4 hubs may be used
downstream of a PC before the U170 device itself. Because the U170 is dependent on USB bus
power, a powered hub should always be used directly upstream of a U170 when not directly
attached to a PC.
Note: The U170 device is powered by the USB bus and a single USB port can
provide power for only one U170 device with a mouse and keyboard. Adding
additional USB devices immediately downstream of the U170 that draw too
much power is likely to cause errors. Using a powered USB hub downstream
from a U170 for high power peripherals is recommended.
Note: Performance may be impacted by poor quality cables or hubs. We
recommend USB 2.0 certified cables with minimum wires sizes of AWG 24
(power) and 28 AWG (signal).
(Note, the higher the number the smaller the wire.)
