A multimedia collaboration system that integrates separate real-time and asynchronous networks—the former for real-time audio and video, and the latter for control signals and textual, graphical and other data—in a manner that is interoperable across different computer and network operating system...http://www.google.es/patents/US20060075121?utm_source=gb-gplus-sharePatente US20060075121 - Registration based addressing and call handles to establish communication
Registration based addressing and call handles to establish communication
