Polycom 1500 Administrator's Manual page 191

RealPresence Collaboration Server (RMX) 1500/1800/2000/4000 Administrator's Guide
The higher Content Resolution, HD1080/15 should be selected only if most of the endpoints
connecting to the conference can support a Content Rate of 768Kbps, which requires the
participant to connect to the conference at a Line Rate of 1024kbps.
When the lower Content Resolution HD720/5 is selected, the conference Content Rate is set to
256 kbps. This will enable the endpoints that connect to the conference at a Line Rate of at least
768 kbps to receive content in the Content channel. Endpoints that connect to the conference at
a line rate lower than 768Kbps, will receive content in the video channel.
● If the Content Settings selection is Hi Resolution Graphics.
 Only HD720/5 can be selected as the Content Resolution with 384 kbps allocated as the
conference Content Rate.
Only endpoints that connect at a Line Rate of 1024 kbps that is required to support a Content Rate
of 384 kbps will receive content in the Content channel. Endpoints that connect to the conference
at a line rate lower than 1024 kbps, will receive content in the video channel will not receive
content.
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