| 摘要 |
PURPOSE:To transmit surely a calling signal from a fixed station to a mobile station by changing over a receiving frequency of a receiver of mobile station side from the frequency between mobile stations at each prescribed time to a frequency of the calling signal from the fixed station automatically. CONSTITUTION:A frequency F1 is used for the communication between mobile stations, a frequency F2 is used for the calling of a mobile station by the fixed station and a frequency F3 is used for the communication between the fixed station and the mobile stations. Communication is attained between the mobile stations by the frequency F1 normally, and a timer 24 of the mobile station gives an output at each prescribed time, the frequency of a local oscillator 23 is changed to receive the frequency F2. When the calling from the fixed station to the mobile station is performed in this case, the calling is given to a speaker 27. Further, the mobile station responds immediately, a dead line signal is caught and the transmission/receiving is attained by the frequency of the channel. |
