ENERGY SAVING INTERPHONE SYSTEM FOR MULTIPLE DWELLING HOUSE

摘要

PROBLEM TO BE SOLVED: To reduce power consumption at the time of stand-by in the interphone system of a multiple dwelling house and to save energy. ;SOLUTION: The energy interphone system for multiple dwelling house, which is constituted of a management room master machine 30, a multiple dwelling entrance machine 20, house master machines 40a installed in respective houses 44a and a control machine 10 controlling a call, a response a conversation between terminals is provided with a sound system power control circuit 19 supplying power to the respective circuits of the data transmission/reception circuits 22, 32 and 42 of the respective terminals connected through the sound transmission/reception circuits 15, 16 and 17 of the control machine when data of call signals from the respective terminals are inputted to the control circuit 11 of the control machine 10.;COPYRIGHT: (C)2001,JPO