说明：  智能无线防盗报警器的设计,由AT89C51单片机控制电路、无线收发电路、DTMF（双音多频）电路、语音录放电路、电话接口电路等部分组成
(Intelligent wireless burglar alarm design, by the AT89C51 single-chip control circuit, a wireless transceiver circuit, DTMF (Dual Tone Multi-Frequency) circuits, voice recording circuit, telephone interface circuit components, such as)