Isfocus is just a feature tag which indicates that the UA is a conference.

Call conference call flow in sip. The call from the PSTN has been routed to the PBX and then to the phone in question. For larger conferences a conference bridge is employed. Conference Caller leaving the Conference BYE Request URI.

PBX A is connected to Gateway 1 SIP gateway via a T1E1. For this purpose it sends a BYE message to the P-CSCF with the Conference-URI as the Request-URI. Given below is a step-by-step explanation of the above call flow.

With an external SIP address and a third party conference call platform you can use OnSIP to host large conference calls with hundreds of participants. Kevin answers the ringing call. The call flow is as.

Lori presses the add button. Sip 3-way call conference --- call flow X-BeenThere. The new users establish a call to the conference URI passed in the refer message.

SIP Call Flow for Inbound Call The SIP call flow diagram for inbound calls is shown in Figure 3. Once a conference is active users can join and leave a conference and remote users can be added to or removed from the conference. Most standard VoIP phones support 3-way or 5-way conference calling.

Advance reservation of a bridge MCU Reservation itself out of scope Call in to conference URL Call out from bridge to list of participants Repeatedly re-configure media streams as needed. The steps involved in the conference scenario covered here are. The conference is created at a MRFC-AS of the users home network.