Disclosed herein are methods, systems, and devices for improved audio, video, and data conferencing. The present invention provides a conferencing system comprising a plurality of endpoints communicating data including audio data and control data according to a communication protocol. A local conference...http://www.google.com/patents/US20050213726?utm_source=gb-gplus-sharePatent US20050213726 - Conference bridge which transfers control information embedded in audio information between endpoints
