The present invention relates to a control method of
broadcasting system using a telephone and control device thereof The method comprises the steps of: connecting to a tone
detector of the
control system by switching a hook switch when a bell
signal transmitted by a call of the subscriber is detected more than a set number; after the connection step, sending a previously recorded guidance voice to the subscriber under control of a
central processing unit and detecting telephone button signals generated by a manipulation of the subscriber by frequency values of
tone frequency; determining which broadcast region the subscriber wants based on the telephone button signals and driving corresponding relays; and connecting electrically the
broadcasting system to a broadcast destination of the selected broadcast region to broadcast speech signals to the broadcast destination, the speech signals being sent from the subscriber. A control device comprises: a bell
signal detector (20) connected to a
telephone line (10) for detecting bell signals that ring by a set number; a
central processing unit (50) for, upon receiving signals applied from the bell
signal detector (20), switching a hook switch (K6) so that values of tone frequencies are applied and guidance voice is outputted simultaneously; a tone detector (30) for detecting the tone frequencies of telephone buttons and applying the detected tone frequencies to the
central processing unit (50) in binary code form; a broadcast equipment controller (60) for receiving binary values from the tone detector (30) and supplying a power to a broadcast equipment to maintain
broadcasting state; and an output controller (70) for receiving the binary values from the tone detector (30), determining locations of broadcast destinations and driving relays.