Polycom (RMX) 1500 User Manual

RealPresence Collaboration Server (RMX) 1500/1800/2000/4000 Administrator’s Guide 

Polycom®, Inc. 

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Beginning with Version 7.6, the H.264 High Profile video protocol is supported in Video Switching (VSW) 
conferences.

● H.264 High Profile is supported in VSW conferences in H.323 and SIP networking environments only 
● For H.264 High Profile-enabled VSW conferences, all endpoints connecting to the conference must 

support High Profile and connect to the VSW conference at the exact line rate and exact resolution 

defined for the conference. Endpoints that do not meet these requirements are connected as 

Secondary (audio only).

● For H.264 Base Profile VSW conferences, both High Profile and Base Profile supporting endpoints 

connect using the H.264 Base Profile.
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Endpoints that do not support the exact conference line rate are disconnected.

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Endpoints that do not support the exact video settings such as protocol and resolution defined for 

the conference will be connected as Secondary (audio only).

The following table lists the System Flags that control the minimum line rate threshold for the various 
resolutions available for High Profile-enabled VSW conferences.

These system flags must be manually added to the Setup menu > System Configuration before you can 
update their values. For more information see the 

.

VSW_CIF_HP_THRESHOLD_BITRATE

64

VSW_SD_HP_THRESHOLD_BITRATE

128

VSW_HD720p30_HP_THRESHOLD_BITRATE

512

VSW_HD720p50-60_HP_THRESHOLD_BITRATE

832

VSW_HD1080p_HP_THRESHOLD_BITRATE

1024

VSW_HD1080p60_HP_THRESHOLD_BITRATE 1024

VSW_HD_1080p60_BL_THRESHOLD_BITRATE

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