Bfcp Over Udp – As-Sip Content - Polycom RealPresence 4000 Administrator's Manual

Table 23-15
Value
PREFER_IPv6
BFCP Over UDP – AS-SIP Content
In compliance with UCR 2008 Change 3, AS-SIP (Assured Services-Session Initiation Protocol)
Content flow is an implementation of SIP that utilizes SIP's built in security features.
When using AS-SIP Content, the media line of the content channel is not sent as part of the
initial SDP Offer/Answer message sequence. The media line of the Content channel is only sent
to the MCU when an endpoint wanting to share Content initiates Content sharing. The
Collaboration Server (RMX) then sends the Content media line to all conference participants
using an SDP Re-invite.
Guidelines
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Polycom, Inc.
ANAT_IP_PROTOCOL System Flag Values for Dial in Dial out (Continued)
Behavior - Dial in and Dial out
sdp-anat appears in SIP headers.
Dial in: IPv6 is the IP Version preference
Dial out: IPv6 is advertised first.
AS-SIP Content is shared using Multiple Resolutions (Content Transcoding) and is not
supported in any other Content sharing mode such as H.263 Content and H.264 Cascade
and SVC Optimized Content Protocol.
Multiple Resolutions consumes system video resources. If sufficient system video
resources are not available, a conference with AS-SIP Content enabled in its Profile, will
not be created. An error: Conference could not be created due to lack of Content DSP
resources, is displayed.
The SIP BFCP UDP application line is included in SDP Offer/Answer message sequence.
An endpoint declaring SIP BFCP TCP is connected with video and audio but without
Content. The SIP BFCP TCP channel will not be connected.
The following resolutions are supported with H.264 HD Content protocol. Only when
H.264 HD is selected, these resolutions are enabled for selection:
— HD 720p5
— HD 720p30
— HD 1080p15
Endpoints that do not support receiving H.264 Content at a resolution of HD 720p5 or
greater are considered Legacy Endpoints and will receive Content using the people video
channel.
Endpoints that do not support transmitting H.264 Content at a resolution of HD 720p5 or
greater are considered Legacy Endpoints and will transmit Content using the people
video channel. Depending on the endpoint type, these endpoints may not be able to
transmit Content at all - this is dependent on the endpoint and is not controlled by the
RMX.
A mixture of older, non AS-SIP compliant and AS-SIP compliant endpoints are
supported in the same conference and are able to share Content.
An endpoint connecting during a Content session is immediately sent an SDP Re-invite
that includes the connect media line and will receive Content.
Chapter 23-Ultra Secure Mode
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