For use in conjunction with a system for producing, at a transmitter location, time division multiplexed (TDM) frames having a plurality of channels of information signals and framing signals, communicating the frames from the transmitter location to a receiver location, and, at the receiver location,...http://www.google.fr/patents/US7061905?utm_source=gb-gplus-shareBrevet US7061905 - Method and apparatus for communicating signals
