Communication, often two-way, of spoken information, By means of electrical signals carried By wires or radio waves. The term was used to indicate transmission of the voice, as distinguished from telegraphy (done in {Morse code} and usually called "{continuous wave}" or CW transmission), radio teletypewriter (RTTY) transmission (also called FSK for "Frequency Shift Keying", the modulation scheme used By such machines), and later, facimile. (1995-03-14)