| 摘要 |
PURPOSE:To appropriately call an operator at the time of the calling at least on a prescribed condition such as an emergency. CONSTITUTION:A remote controller is equipped with two amplifiers 3 and 8. An amplification factor can be manually set by a volume 5 at the amplifier 3 side. The amplifier 8 has the amplification factor a little larger than the maximum amplification factor which can be set by the amplifier 3 and the volume 5. A calling signal which is alternatively selected by a switching part 7, and applied from a control table, is inputted to the amplifier 3 and the amplifier 8. The switching part 7 is switched so that the amplifier 8 can be selected, according to a switching control signal outputted when an incoming call due to an emergency communication is generated from a switching control part 6 provided at the control table. |
