Avocent DSR Mode D'emploi page 61

CHAPTER
The Video Viewer
5
The Video Viewer Window
The Video Viewer is used to conduct a KVM session with the target devices attached to a DSR
switch using the on-board web interface. When you connect to a device using the Video Viewer,
the target device desktop appears in a separate window containing both the local and the target
device cursor. The Video Viewer window supports either a 3- or 5-button mouse.
The DSR switch on-board web interface software uses a Java-based program to display the Video
Viewer window. The Video Viewer client requires Java version 1.5 or later when opened. The DSR
switch on-board web interface automatically downloads and installs the Video Viewer the first time
it is opened.
NOTE: The DSR switch on-board web interface does not install the Java Resource Engine (JRE). The JRE is
available as a free download from http://www.sun.com for PC users and from http://www.apple.com for
Mac users.
NOTE: The DSR switch on-board web interface uses system memory to store and display images within Video
Viewer windows. Each opened Video Viewer window requires additional system memory:
• An 8-bit color setting on the client PC requires 1.4 MB of memory per Video Viewer window.
• A 16-bit color setting requires 2.4 MB and a 32-bit color setting requires 6.8 MB.
Opening more than four simultaneous Video Viewer windows may affect system performance and is not
recommended. If you attempt to open more Video Viewer windows than your system memory allows, you will
receive an out-of-memory error and the requested Video Viewer window will not open.
If the device you are attempting to access is currently being viewed by another user, you will be
prompted to preempt the other users if your preemption level is equal to or greater than theirs. An
appliance administrator can also disconnect an active user via the Active Session page. For more
information, see the To disconnect an active KVM session (administrator only): section on page 43.
Launching a KVM Session
NOTE: When using a non-proxied connection, video performance over a slower network connection may be less
than optimal. Since certain color settings (such as Grayscale) use less network bandwidth than others (such as
Best Color), changing the color settings can increase video performance. For optimal video performance over a
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