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HOUSE INFORMATION BOARD SUBORDINATE MASTER UNIT, HOUSE INFORMATION BOARD MASTER UNIT, AND SECURITY MONITOR AND SPEECH COMMUNICATION SYSTEM USING THE UNITS
HOUSE INFORMATION BOARD SUBORDINATE MASTER UNIT, HOUSE INFORMATION BOARD MASTER UNIT, AND SECURITY MONITOR AND SPEECH COMMUNICATION SYSTEM USING THE UNITS
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机译:房屋信息委员会为主机构,房屋信息委员会主控单元,以及使用该单元的安全监视和语音通信系统
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摘要
PROBLEM TO BE SOLVED: To provide an originally improved house information board master unit so as to output an alarm sound from a subordinate master unit even when the subordinate master unit does not work due to power failure, in the case a system of hands free is constructed.;SOLUTION: A house information-board subordinate master unit B is connected to a house information-board master unit A having an emergency power function, a security monitoring function, and at least an extension speaker connection terminal T1, through a voice communication line La, a voice signal line Lb and a control signal line Lc. The subordinate master unit B is provided with a hands-free voice communication means 201 for voice communication with the house information-board master unit A. The subordinate master unit B also includes a master-unit connection terminal T2 for connecting to the extension speaker connection terminal T1 of the master unit A through a voice signal line Ld; a speaker connection switching means RY3 for switch-connecting a speaker SP of the voice communication means 201 to either the voice line d connected to the master-unit connection terminal T2, or an output terminal of the speech communication means 201; and a control means 25 for monitoring power supply to the subordinate master unit B and controlling to switch the speaker connection switching means RY3 depending on the existence of power supply.;COPYRIGHT: (C)2004,JPO&NCIPI
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