HP Remote Graphics Software 5.4.8 User Guide

Remote USB overview
RGS supports remote USB, which allows USB devices connected to the Local Computer (local USB
devices) to be attached to a Remote Computer. Remote USB is supported on Remote Computers running
Windows, and enables the Remote Computer to have direct access to the local USB devices as if they
are connected directly to the Remote Computer (see
Figure 2-18 Remote Computer can access the local
USB devices on page 30). For details on remote USB, see Remote USB operation on page 136.
NOTE: Hewlett-Packard RGS supports remote USB. Devices that adhere to the USB standard should
work. Because RGS is a remote graphics protocol and is emulating the USB protocol over a network,
devices that are sensitive to timing may not work at all. This includes USB devices with security and
encryption mechanisms built into them. The additional network delay could be looked at as a threat.
Other devices that are known to break the USB standard, such as WEB CAMS, may also not function
at all. Performance of USB devices over RGS will not be equal to that of a locally connected device.
File copies may take longer due to the additional overhead of the network protocol sitting on top of the
USB protocol.
HP recommends that customers thoroughly test any USB device they are considering to use with RGS as
Hewlett-Packard cannot certify and or guarantee it will work over a remote USB protocol. Many USB
vendors do not support their devices over any remote USB protocol and you should check with the USB
vendor for support concerns first.
Figure 2-18 Remote Computer can access the local USB devices
In Figure 2-18 Remote Computer can access the local USB devices on page 30, two USB devices are
connected to the Local Computer. Using RGS, the local USB devices can be attached to the Remote
Computer. The keyboard and mouse always remain connected to the Local Computer, and cannot be
attached to the Remote Computer.
The local USB devices can be collectively attached to a single Remote Computer (see
Figure 2-19 The
local USB devices can be attached to only one Remote Computer at a time. on page 31). The local
USB devices cannot be split between multiple Remote Computers nor can they be collectively attached
to multiple Remote Computers.
30 Chapter 2 RGS overview