Cellular mobile telephone apparatus and an alarm device therefor

1. Field of the Invention A cellular mobile telephone system including a cellular mobile telephone apparatus and a peripheral apparatus communicating bidirectionally. The cellular mobile telephone apparatus may include: a modulating/demodulating device demodulating radio frequency signals into a digital signal including a control signal; a controlling device controls operation of the cellular mobile telephone apparatus in accordance with the control signal; a first communicating device performs bidirectional communication, including transmitting a first control information controlling operation of the peripheral apparatus. The peripheral apparatus may include: an inputting device for inputting a second control information; a second communication device performing bidirectional communication with the cellular mobile telephone apparatus; and a control device controlling operation of the peripheral apparatus in accordance with the first control information, and performing control of the cellular mobile telephone apparatus through the communication device according to the second control information for changing a mode of the cellular mobile telephone apparatus.