Polycom DOC2702A User Manual

Polycom RealPresence Collaboration Server (RMX) 1500/2000/4000 Administrator’s Guide 

Polycom, Inc.

Enter the interval in seconds between the Intra requests sent from the RMX to the 

endpoint sending the Content to refresh the Content display. Refresh requests that will 

be received from endpoints within the defined interval will be postponed to the next 

interval.

Default setting: 5

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The H239_FORCE_CAPABILITIES System Flag in system.cfg gives additional control 

over Content sharing:
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When the flag is set to NO (default), the RMX only verifies that the endpoint 

supports the content protocols: H.263 or H.264.

—

When set to YES, the RMX checks frame rate, bit rate, resolution, annexes and all 

other parameters of the Content mode as declared by an endpoint during the 

capabilities negotiation phase. If the endpoint does not support the Content 

capabilities of the MCU, the participant will not be able to send or receive content 

over a dedicated content channel. 

RMX users can preview the video sent from the participant to the conference (MCU) and the 

video sent from the conference to the participant. It enables the RMX users to monitor the 

quality of the video sent and received by the participant and identify possible quality 

degradation.
The video preview is displayed in a separate window independent to the RMX Web Client. 

All Web Client functionality is enabled and conference and participant monitoring as well 

as all other user actions can be performed while the video preview window is open and 

active. Live video is shown in the preview window as long as the window is open. The 

preview window closes automatically when the conference ends or when participant 

disconnects from the conference. It can also be closed manually by the RMX user.

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Video preview is available in AVC (CP and VSW) conferences. It is not available in SVC 

Conferencing Mode.

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Video preview window size and resolution are adjusted to the resolution of the PC that 

displays the preview.

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Video Preview of the video sent from the conference to the participant is shown 

according to the line rate and video parameters of the level threshold to which the 

participant is connected. 

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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.

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Video preview is supported with MPM+ and MPMx cards.

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Only one preview window can be displayed for each RMX Web Client connection 

(workstation).