-4- Amateur station: A station used by one wireless telecommunications amateur Experimentation station: A station dedicated to scientific research and experiments Signal: A message, sound or image sent to individuals or machines, exchanged by telecommunications system Electromagnetic: The term covers any system that transmission signals by electricity wire, wireless waves and any other electromagnetic power source Theoretical system: Any theoretical system used to carry signals Termination station: A technically equipped station to connect to a network and contact effectively through Termination equipment: Equipment connected, directly or indirectly, with termination stations to transmit and receive signals Telephonic: A real-time word transmission from one station to another via an electromagnetic system, excluding telephone calls Cable: Transmission of signals from a station to another via an electromagnetic system, except telephone calls Telex: Direct transmission of a signal from a transmitter to a receiver Frequency: Electromagnetic frequency resulting from contact of a conductor with quartz crystal Internal network: An independent network that does not infringe on public or third party property