PURPOSE: To make it possible to modify the contents of a control indication word all the time while eliminating a wiretap and abuse of a lost special oscillator by making it unnecessary to carry the special oscillator by enabling remote control by audio signals for "rewind", "playback", etc.

CONSTITUTION: For remote control, a called subscriber calls automatic answering telephone set 6 from telephone set 7 at a visit spot and then gives control indication words directly to the receiver. Audio confirming circuit 9 recognizes and specifies the given control indication words and, according to them, exercises control over recording tape recorder part 2. With a sound such as "playback", "rewind" and "fast forward", for example, recording tape recorder part 2 can be placed in playback, rewind or fast forward mode. Thus, there is not trouble of carrying a special oscillator with him or her for remote control. Therefore, a wiretap and abuse by the oscillator that is missing are completely eliminated. Further, the called subscriber can freely set the contents of the control indication words and also modify them all the time.