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RealPresence Collaboration Server (RMX) 1500/1800/2000/4000 Administrator’s Guide
Polycom®, Inc. 431
For more information see Participant Level Monitoring.
Detecting SIP Endpoint Disconnection
When an abnormal disconnection of SIP endpoints occurs because of network problems or client
application failures, SIP endpoints remain connected to the conference causing connection disruptions. For
example, the video freezes in the layout or blocks content for SIP endpoints when a quick re-connection is
performed. It can take several minutes to detect the SIP endpoint disconnection using the SIP standard
behavior.
In a normal SIP video call, audio and video (RTP and RTCP) messages are sent from the endpoints to the
MCU to detect the signaling of connected endpoints. Conversely, SVC endpoints might not send video RTP
messages to the MCU when a participant is not displayed in the video layout of any of the participants in the
conference. For SVC endpoints, the MCU will only verify audio RTP and RTCP messages and video RTCP
messages. Video RTP messages will not be checked.