The utility model is connected with multi household extension downstairs with a host, the host control board directly to the corresponding household extension call signal, the corresponding extension in the household after receiving the signal can also be issued in response to the trigger signal host sounder. If no one presses the button, the host has no trigger signal.
【技术实现步骤摘要】
【国外来华专利技术】
【技术保护点】
【技术特征摘要】
【国外来华专利技术】
【专利技术属性】
技术研发人员：于家申，游乃亮，
申请(专利权)人：于家申，游乃亮，
类型：实用新型
国别省市：41[中国|河南]
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