| 摘要 |
PROBLEM TO BE SOLVED: To allow the system to inform a resident of a call from a doorphone slave set and emergency such as fire and occurrence of gas leakage and to allow the resident to confirm it at a location apart from an interphone master set and under an environment with large noise sound. SOLUTION: The interphone system is provided with a doorphone slave set 1, an interphone master set 2 that incorporates a radio signal transmission circuit 29 connecting to a fire sensor 3, or a repeater 5 or a gas leakage sensor 4, and sending a radio communication signal for a call from the interphone slave set and a fire/gas leakage alarm from the fire sensor or the repeater or the gas leakage sensor, and a portable receiver 6 incorporating a radio signal reception circuit 40 that receives a signal sent from the radio signal transmission circuit and a vibration section 41 that is vibrated by the received signal, and the portable receiver is provided with a display circuit 42 that displays the signal received by the radio signal reception circuit and (or) a speaker 44 that is sounded by the signal. |
