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RMX 2000 Administrator's Guide - Polycom Support

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Content Protocol<br />

<strong>Polycom</strong> <strong>RMX</strong> <strong>2000</strong>/4000 Administrator’s <strong>Guide</strong><br />

The following table shows the bit rate allocated to the Content channel<br />

from the video channel in each of the three Content modes:<br />

Table 2-4 Bit Rate Allocation to Content Channel<br />

Conf<br />

Kbps /<br />

Mode<br />

64/<br />

96<br />

128 256 384 512 768 1024<br />

1472/1920/<br />

4096-VSW<br />

Graphics 0 64 64 128 128 256 256 256<br />

Hi-res<br />

Graphics<br />

Live<br />

Video<br />

0 64 128 192 256 384 384 512<br />

0 64 128 256 384 512 768 768<br />

H.263 Annex T and H.264 protocols are supported for the Content<br />

transmission.<br />

H.264 provides higher video quality at video resolutions of up to HD.<br />

Endpoint Capabilities<br />

• If an endpoint that supports only H.263 for Content Sharing connects<br />

to a conference with an Up to H.264 Content sharing Profile:<br />

— H.263 is used for Content if that participant is the first to connect<br />

to the conference<br />

— Content sharing is stopped for all participants if the connection<br />

occurs after Content sharing has started. When Content sharing<br />

is restarted by the user, Content is shared using H.263.<br />

• If an endpoint that does not support H.264 Content sharing<br />

disconnects from a conference with an Up to H.264 Content Sharing<br />

Profile, the Content sharing continues using H.263. This is true even if<br />

all the remaining connected endpoints support H.264. If Content<br />

sharing is stopped and restarted by the user, Content sharing is<br />

automatically upgraded to use H.264.<br />

• The H239_FORCE_CAPABILITIES System Flag in system.cfg gives<br />

additional control over Content sharing.<br />

When the flag is set to NO, the <strong>RMX</strong> only verifies that the endpoint<br />

supports the content protocols: Up to H.264 or H.263.<br />

2-13

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