This paper provides a warning system, it use DTMF signal of telephone and MT8888 as a monolithic DTMF transceiver with call progress. It also gives the hardware and software flow chart of the system.

介绍一种基于电话网且采用MT8888作DT MF信号的收发器件的报警系统，文中给出了MT 8888与电话线的接口电路及软件流程图。

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