There are two separate audio conferences involved in a web meeting or video conference. One audio conference is part of the video session that gets transmitted to all web or video conference attendees. A second audio stream comes from the PBX. The PBX conference bridge allows participants to connect to the web meeting or video conference from a SIP handset or cell phone, with audio only, through the PBX.
When a web meeting starts, the system makes a connection from the presenter's PBX audio conference bridge to the web meeting's audio conference bridge. This allows participants on both audio bridges to interact with each other.
Remember that the domain's default PBX conference bridge (this is set in the Meeting configuration page) will be used if the presenter does not have an Owned Conference bridge.
The diagram below shows how the connection is established from the PBX Audio Conference Bridge to the Web Meeting Audio Conference Bridge..
Participants that are using the Meeting Manager client will see a single connection called PBX as being active when participants from the PBX conference bridge are speaking.
The individual participants connected to the PBX audio conference are not displayed in the Meeting Manager client.
Similarly, when viewing the Current Active Calls in the PBX portal, there will be a single session from the PBX conference bridge to the Meeting Manager web conference session with the Meeting ID displayed as the dialed number.