Digital-analog hybrid five-party talkback system

Abstract

The invention discloses a digital-analog hybrid five-party talkback system. The digital-analog hybrid five-party talkback system comprises four machine room talkback extensions, an A / D conversion module and a management central module and is characterized in that each machine room talkback extension is provided with a first power supply module, an elevator top extension, an elevator box extensionand a pit bottom extension; an output end of the first power supply module is respectively connected with the machine room talkback extensions, the elevator top extensions, the elevator box extensionsand the pit bottom extensions; the machine room talkback extensions, the elevator top extensions, the elevator box extensions and the pit bottom extensions are connected with one another in sequence;the A / D conversion module is used for converting an input analog signal into an output digital signal; an output end of the A / D conversion module is respectively connected with the four machine roomtalkback extensions; and the management central module includes a management central host, a management host, a mobile handheld machine, a management central computer and a second power supply module.The digital-analog hybrid five-party talkback system has the advantages of flexible networking, stable communication, clear voice, strong extendability, far transmission distance, low power consumption, low failure rate, etc.

Description

technical field [0001] The invention relates to the technical field of five-party intercom, in particular to a digital-analog hybrid five-party intercom system. Background technique [0002] Although many elevators on the market now use the five-party intercom system, the traditional five-party intercom system using analog signals not only has poor call quality and is susceptible to interference, but also the lines must be connected separately. If there are many elevators When it is used, it will cause a large degree of waste of lines, and it is not easy to overhaul; digital signal processing is expensive, wiring is complicated, and the cost is high. In view of this, the present invention develops a digital-analog mixed five-party intercom system, which can well solve the common and difficult problems described above. Contents of the invention [0003] The purpose of the present invention is to solve the shortcomings in the prior art, and propose a digital-analog hybrid f...

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Problems solved by technology

[0002] Although many elevators on the market now use the five-party intercom system, the traditional five-party intercom system using analog signals not only has poor call quality and is susceptible to interference, but also the lines must be connected separately. If there are many elevators When it is used, it will cause a large degree of waste of lines, and it is not easy to overhaul; digital signal processing is expensive, wiring is complicated, and the cost is high

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