Establishing a global conference using plural conference bridges

摘要

A conference bridge (106a) establishes a link with another bridge (106b) to provide a global conference by using SIP dialout with one or more remote conference bridges. Each bridge subscribes for event notifications for that conference from the remote conference bridge. The received notifications can be made available for use by the source bridge when constructing the roster information for applications executing at the source bridge. The received notifications can be displayed and provide the proper diagram for the distributed conference complete with media, mode, and other information displayed. Further, the system allows the use of intelligent endpoint user interfaces (102a,b etc.) to send commands to control mute, lecture mode, sidebars, breaking the bridge into sub­groups, and the like during the conference.