| 摘要 |
PURPOSE:To use plural systems simultaneously at the same location, to easily set a frequency code and an ID code remotely and to improve the workability of setting by setting a different frequency code from each other at every system. CONSTITUTION:The IF code of a receiver carried by a waiting customer desired to be called is inputted to a CPU 1F from the key 1A of a transmitter 1, the ID code is carried on the radio wave of the frequency signal of the setting code and sent to receivers 21, 22, 23 through an antenna 1B from a transmission section 1D. The receiver 21(22, 23) receives the sent radio wave and the received ID code is inputted to a microcomputer. The microcomputer reads the ID code written already in an EEPROM and compares it with the received ID code. Thus, only the microcomputer of a receiver whose own ID code is coincident with the received ID code informs the arrival of the fall in buzzer tone, vice and lighting or blink or the like by means of a small sized speaker 21C and an LCD display device 21D. |
