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RealPresence Collaboration Server (RMX) 1500/1800/2000/4000 Administrator’s Guide
Polycom®, Inc. 207
● In versions up to and including Version 7.2.2, only users with Administrator authorization could
request to view a video preview. In later versions, all users can view a video preview.
● Only one preview window can be displayed for each Collaboration Server Web Client connection
(workstation).
● Only one preview window can be displayed for a single conference and up to four preview windows
can be displayed for each media card on different workstations (one per workstation and one per
conference). For example, if the Collaboration Server contains two media cards, and there are 5
conferences running on the Collaboration Server, if five conferences are running on the same media
card, only four conferences can be previewed from four different workstations. If four or less
conferences are running on one media card and the remaining conferences are running on the other
media card, all five conferences can be previewed.
● Live video that is shown in the preview window does not include the Content when it is sent by the
participant.
● Video Preview is supported in cascaded conferences.
● If the video preview window is opened when the IVR slide is displayed to the participant, it will also
be displayed in the video preview window.
● Video Preview is supported with H.264 High Profile.
● Video Preview is not supported for endpoints using the RTV protocol.
● Video Preview is disabled in encrypted conferences.
● Video preview cannot be displayed when the participant’s video is suspended.
● Participant’s video preview and the Polycom Desktop application (such as CMAD) window cannot be
open and running simultaneously on the same PC as both require the same DirectDraw resource.
Workstation Requirements to Display Video Preview
To be able to display the video preview window, the following minimum requirements must be met:
● Windows XP, Windows Vista and Windows 7
● Internet Explorer 7 and later
● DirectX is installed
● DirectDraw Acceleration must be enabled and no other application is using the video resource
● Hardware acceleration must be enabled
Testing your Workstation
To ensure that your workstation can display the video preview window:
1 In Windows, click Start > Run.
The Run dialog box opens.
2 In the Open field, type dxdiag, and press Enter or click OK.