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Polycom RMX 2000/4000 Administrator’s Guide
2-13
The following table shows the bit rate allocated to the Content channel
from the video channel in each of the three Content modes:
Content Protocol
H.263 Annex T and H.264 protocols are supported for the Content
transmission.
H.264 provides higher video quality at video resolutions of up to HD.
Endpoint Capabilities
• If an endpoint that supports only H.263 for Content Sharing connects
to a conference with an Up to H.264 Content sharing Profile:
— H.263 is used for Content if that participant is the first to connect
to the conference
— Content sharing is stopped for all participants if the connection
occurs after Content sharing has started. When Content sharing
is restarted by the user, Content is shared using H.263.
• If an endpoint that does not support H.264 Content sharing
disconnects from a conference with an Up to H.264 Content Sharing
Profile, the Content sharing continues using H.263. This is true even if
all the remaining connected endpoints support H.264. If Content
sharing is stopped and restarted by the user, Content sharing is
automatically upgraded to use H.264.
•The H239_FORCE_CAPABILITIES System Flag in system.cfg gives
additional control over Content sharing.
When the flag is set to NO, the RMX only verifies that the endpoint
supports the content protocols: Up to H.264 or H.263.
Table 2-4 Bit Rate Allocation to Content Channel
Conf
Kbps /
Mode
64/
96
128 256 384 512 768 1024
1472/1920/
4096-VSW
Graphics 0 64 64 128 128 256 256 256
Hi-res
Graphics
0 64 128 192 256 384 384 512
Live
Video
0 64 128 256 384 512 768 768