| 摘要 |
PURPOSE:To provide a data transmission method for calling a party at any prescribed place and transmitting a message by using weak radio waves or the like. CONSTITUTION:A data transmission system is composed of a radio transmitter and a receiver 10 equipped with a pager function for receiving radio waves A from the radio transmitter for calling inside a department store or the like, the receiver 10 is provided with an antenna 11, receiver 12 for receiving radio waves at a specified frequency, CPU 13 for controlling respective parts, EEPROM 14 for storing an identification(ID) code and a caller code, recorder 15, changeover switch(SW) 16, amplifier 17, speaker 18, SW 19 and power unit 20 or the like, correspondent identification data are retrieved and transmitted by a button dedicated to a caller at the radio transmitter for calling and when the receiver 10 receives data matched with it's own ID code and the caller code and those data are non-received data, the received data are recorded in the recorder 15. |
