摘要：本文主要介绍了一种以单片机AT89C51、ISD1420电路、模拟摘挂机电路、拨号电路为核心的远程语音报警系统，该系统用MITEL的DTMF双音频信号解码电路由MT8888芯片担当。并从基本工作原理、电路构成等方面对其进行详细阐述。该系统可实现自动拨号，通过普通电话线进行告警信号呼叫，及时将警精通知事主。并给出了部分基本电路及软件流程。系统自动化程度、适用性强、功能灵活多样，可广泛应用与家庭、商店、银行等重要场合
关键字：自动拨号；单片机控制；DTMF
Design of remote control voice alarm system
Abstract： This paper mainly introduces a to AT89C51, ISD1420 voice circuit, analog pick hangup circuit, a dialing circuit as the core of the remote voice alarm system, the system of mitel DTMF signal decoding circuit by the MT8888 chip to play. And the basic working principle, circuit structure and other aspects of the detailed exposition. This system can realize the automatic dialing alarm signal call through ordinary telephone lines, promptly notify the victim alertment. And some basic circuit and software flow are given. System automation degree, strong applicability, flexible and diverse functions, can be widely used in families, shops, banks and other important occasions
Keywords：Automatic dialing,single chip microcomputer control, DTMF
目录
