telephone set - electronic equipment that converts sound into electrical signals that can be transmitted over distances and then converts received signals back into sounds; "I talked to him on the telephone"desk phone - a telephone set that sits on a desk or table electronic equipment - equipment that involves the controlled conduction of electrons (especially in a gas or vacuum or semiconductor) mouthpiece - an acoustic device; the part of a telephone into which a person speaks speakerphone - a telephone with a microphone and loudspeaker; can be used without picking up a handset; several people can participate in a call at the same time |