Elevator voice inter-speaking system

The utility model discloses an elevator voice talkback. A pickup in the elevator is connected with a loudspeaker in a monitoring center through a transmission line to form a first voice transmission circuit and the pickup in the monitoring center is connected with the loudspeaker in the elevator thr...

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Bibliographic Details
Main Authors PAN HAIHUA, JIA YUHUI, LIU HAICHAO, CHEN GUOLIANG, QIU ZHIYING, LIANG BOFENG, ZHONG ZHAOFENG, LIN WENCHANG
Format Patent
LanguageChinese
English
Published 17.09.2008
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
SELECTING
TRANSMISSION
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Summary:The utility model discloses an elevator voice talkback. A pickup in the elevator is connected with a loudspeaker in a monitoring center through a transmission line to form a first voice transmission circuit and the pickup in the monitoring center is connected with the loudspeaker in the elevator through a transmission line to form a second voice transmission circuit; in the first voice transmission circuit, an analog-digital conversion module is arranged at the end close to the elevator and a digital-analog conversion module is arranged at the end close to the monitoring center; in the second voice transmission circuit, a digital-analog conversion module is arranged at the end close to the elevator and an analog-digital conversion module is arranged at the end close to the monitoring center. The elevator voice talkback of the utility model adopts the digital signal mode for transmission to achieve voice communication and has the advantages of high interference resistance and error correction capacity, high tr
Bibliography:Application Number: CN2007259520U