USB Virtual Desktop (Model U170) User Manual
Page 10
Connection Options
The U170 may be attached to a host 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 PC, device to hub, or hub to
hub, must be no longer than 5 meters. The USB 2.0 specification states that a total of four hubs
may be used downstream of the host PC before the U170 device itself. Because the U170 is
dependent on USB bus power, you should always use a powered hub directly upstream of a
U170 when a U170 is not directly attached to a host PC. See the illustrations below for
reference.
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.
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