Content Transmission Modes - Polycom RMX 1500 Administrator's Manual

Content Transmission Modes

• People+Content is supported in cascaded conferences but cannot be
used as the protocol for a cascade link.
• If an endpoint supports both H.239 and People+Content protocols,
H.239 is selected as the preferred communications protocol.
• People+Content is enabled by default. It can be disabled for all
conferences and endpoints by manually adding the ENABLE_EPC
System Flag to the System Configuration and setting its value to NO
(default setting is YES).
• Endpoints that support People+Content (for example, FX endpoints)
may require a different signaling protocol. For these endpoints,
manually add the System Flag CS_ENABLE_EPC to the System
Configuration and set its value YES (default value is NO).
The Content channel can transmit one of the following modes:
• Graphics – default mode, for standard graphics
• Hi-res Graphics – requiring a higher bit rate, for high quality display
or highly detailed graphics
• Live Video – highest bit rate, for video clips or live video display
The highest common Content bit rate is calculated for the conference each
time an endpoint connects. Therefore, if an endpoint connects to an
ongoing conference at a lower bit rate than the current bit rate, the
Content bit rate for the current conference is re-calculated and decreased.
Bit rate allocation by the MCU is dynamic during the conference and
when the Content channel closes, the video bit rate of the People conference
is restored to its maximum.
During a conference the MCU will not permit an endpoint to increase its
bit rate, it can however change its Content resolution. The RMX can
decrease the allocated Content bit rate during a conference.
Polycom RMX 1500/2000/4000 Administrator's Guide
2-31