A method of transmitting delay sensitive information over Internet Protocol (IP) over Frame Relay including storing the information in an IP packet, storing the IP packet in a sub-frame, storing a special symbol representing that the frame is delay sensitive in the sub-frame, storing the sub-frame in...http://www.google.com/patents/US6594278?utm_source=gb-gplus-sharePatent US6594278 - Apparatus for transmitting delay sensitive information over frame relay
