IM to Multi-party Video Escalation

Unanswered Question
Apr 5th, 2010

Can someone please explain the call flow of escalating an IM between two CUPC users to a multi-party video conference?

What functions do each of the following play:




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Jonathan Schulenberg Mon, 04/05/2010 - 07:53

You can escalate an IM to a call and then merge additional particpants into it through CUPC. If these participants are video-capable, CUPC will offer video functionality automatically. Note that CUPC 7.x only support video in softphone mode. Deskphone mode would require CUVA.

CUCM would choose the appropriate conference bridge when CUPC requests a conference be formed for three or more participants. The Intelligent Bridge Selection would choose a video bridge if two or more of these participants are video capable.

CUVC is the MCU which would provide the video conference resource to UCM. This is analogous to the audio conferencing resource provided by DSPs in an ISR.

yogan.patel Mon, 04/05/2010 - 07:57

Thanks Jonathan.

What takes place when a point-to-point video conference is initiated?

Does the CUCM set up the call and simply allow all RTP traffic to flow from one CUPC to another?

Jonathan Schulenberg Mon, 04/05/2010 - 07:59

Yes. CUCM always controls call setup and capabilities negotiation. It will instruct the endpoints accordingly based on what it decides. This is no different than an audio call.

yogan.patel Mon, 04/05/2010 - 08:12

What protocol is used between the CUPC and CUCM to initiate the video call?


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