Content Sharing Using H.239 Protocol - Polycom RealPresence 800s Administrator's Manual

Sharing Content During Conferences
Content such as graphics, presentations, documents or live video can be shared with conference
participants using the H.239 (H.323) or BFCP (SIP) protocol, which are the standard protocols for content
sharing.

Content Sharing Using H.239 Protocol

The H.239 protocol allows compliant endpoints to transmit and receive two simultaneous video streams:
● People video stream – displays the video of the people participating in the meeting. This is the
primary video channel of the conference and it is displayed in all the conferencing modes.
● Content video stream – displays the content being shared, such as graphic presentations, files,
movies, or any information that can be displayed on the computer's screen.
By default, all conferences, Entry Queues, and Meeting Rooms launched on the Collaboration Server have
H.239 content sharing capabilities.
Endpoints may not send Content while connecting to an Entry Queue.
Endpoints without H.239 capability can connect to the video conference without Content.
Cascade links declare H.239 capabilities and they are supported in Star cascading topologies. For more
details, see Basic Cascading
● HD1080p30 Content is supported:
 In AVC-CP conferencing mode only.
 With SIP and H.323 endpoints
 With the H.263 and H.264 Auto Selection, H.264 HD and H.264 Cascade and SVC Optimized.
Content protocol options.
 With Customized Content Rates.
 In (H.323) Cascaded conferences.
 On Legacy Endpoints when the Send Content to Legacy Endpoints option is selected.
 Content is shared using the video channel.
● HD1080p30 is not supported:
 With RealPresence® Content Sharing Suite for Microsoft® Lync® endpoints.
 When TIP compatibility is set to Prefer TIP or Video and Content.
 TIP Content is shared at XGA Resolution at 5 frames per second.
 By H.263 Content Protocol.
 In Multiple Content Resolutions mode.
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