A videoconferencing system and method comprising a plurality of workstations, providing AV capture and reproduction facilities, interconnected by a network providing an AV path for carrying signals representing videoconference participants. The system and method includes one or more of a remote participant...http://www.google.com.hk/patents/US6343314?utm_source=gb-gplus-share專利 US6343314 - Remote participant hold and disconnect during videoconferencing
