According to the invention, messages to be transmitted between user terminals interconnected by a transmission network are classified into "heavyweight" messages and "lightweight" messages. The heavyweight messages, i.e. messages containing a large quantity of data, are transmitted over the network in...http://www.google.es/patents/US5327423?utm_source=gb-gplus-sharePatente US5327423 - Method and a network for transmitting messages in frequency channels
Method and a network for transmitting messages in frequency channels
