远程语音报警器设计

Design of A Distance Voice Alarm

给出了一种通过公用电话网进行远程传输的语音报警系统。该系统用 MI-TEL 公司的 DTMF收发器 MT8880芯片作为电话双音多频信号的解码核心 ,用 AT89C5 1单片机作主控器 。

This paper presents a voice alarm which utilizes the public telephone network to transmit the voice alarm signal. The system uses MT8880 (made by MITEL company) as the decoding chip of DTMF telephone and chip AT89C51 as the microcontroller, so, the circuit is simple and adaptive.