硬件部分以单片机at89c51为控制核心，包括自动拨号、检测、报警和放音等电路。
The hardware is made up of automatic dialing, testing, alarming and playing, which is controlled by AT89C51 single chip microcomputer.
本文介绍-种以at89c 51单片机为控制核心的自动拨号电话报警系统。
This essay introduces an Auto Phone Dialing Alarm System based on a controlling core by AT89C51.
本文提出利用单片机实现自动拨号的方案，并给出了详细的电路设计方法。
This paper presents a scheme that a monolithic computer is used for auto-dialing. The circuit design method is given in detail. It is suited to warning equipment for household, office and storehouse.
本文提出利用单片机实现自动拨号的方案，并给出了详细的电路设计方法。
This paper presents a scheme that a monolithic computer is used for auto-dialing. The circuit design method is given in detail. It is suited to warning equipment for household, office and storehouse.
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