| 摘要 |
PURPOSE:To prevent the erroneous calling of a receiver due to an erroneous dial by setting an inherent pass-word to an individual receiver in the receiver information of a radio calling device, adding and inputting the pass-word to the telephone number of the receiver and sending a selecting calling signal for the transmitter when both are coincident with each other. CONSTITUTION:The title system is composed of a radio calling device 3 to receive a calling request from a public communication network 2 based on the calling from a transmitting person 1, convert this to a selecting calling signal to call a portable receiver 5 and send it to a transmitter 4 and a transmitter 4 to transmit the radio frequency modulated by the signal. The radio calling device 3, when a pass-word is stored in the receiver information and the telephone number is sent from the telephone set of a calling side through a telephone network 2, after the receiver corresponding to the telephone number is called and it is decided whether it is satisfactory or not, sends a signal to promote the input of the pass-word, and in accordance with this, receives the figure information sent from a telephone set by the combination of a tone signal, collates it with the pass-word in the receiving information, and only at the time of the coincidence, and is operated so as to send the selecting calling signal in the receiver information to the transmitter 4. |
