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Polycom® RealPresence Collaboration Server (RMX) 1500/2000/4000 Administrator’s Guide
4-20 Polycom, Inc.
— If HD1080p15 is provided, 2 HD video resources are allocated to the conference.
• Optionally, Content can be sent at multiple resolutions to H.263 endpoints and H.264
endpoints whose resolution is lower than HD and support H.263 content. In this case an
additional resource is allocated.
• Optionally, Content can be sent to cascaded RealPresence Collaboration Server (RMX)s.
— An additional resource is allocated to the conference, based on the content
resolution selected. The resolution sent is set in the Conference Profile when H.264
Cascade is selected.
— All cascading conferences must be defined with the same content settings (content
line rate, resolution and frame rate).
— A link that does not support the content settings cannot receive content.
• If there are not enough resources available, Multiple Content Resolutions is disabled and
the conference does not include cascading links, content sharing mode reverts to Video
Switching mode.
If the conference includes cascading links, and the conference is set toH.264 Cascade
and SVC Optimized:
— H.264-capable endpoints will share content using these settings.
— H.263-capable endpoints will not share content and will receive the content over the
video (people) channel.
— If H.264 Cascade was not selected for the conference, the H.264 HD protocol will be
used.
• H.264 endpoints that are not HD capable and do not support H.263 will receive content
over the video (people) channel.
• TIP endpoints are not supported. Content will be displayed over the video (people)
channel.
•If AS SIP is enabled for the conference, Multiple Resolutions will be checked. H.264 will
be enabled, and both H.263 and H.264 Cascade will be hidden. This can improve AS SIP
performance in high-traffic environments. In this case, resources are allocated
immediately when the conference is started.
Enabling Multiple Content Resolutions for Content Sharing
The Multiple Content Resolutions mode is enabled or disabled in the conference Profile, in
the Video Quality Tab.