电话智能遥控器的主要控制部分是由单片机构成，进行主要的信息处理，接收外部操作指令形成的各种控制信号，并完成记录各种信息；接口电路提供单片机与电话外线的接口。其中包括振铃检测、自动摘挂机控制、忙音检测、双音频DTMF解码，及语音提示电路。语音提示电路是电话远程控制器的重要组成部分。为了降低装置的成本，系统的提示音将使用模拟语音录放模块ISD4002。语音提示电路受单片机的控制产生相应的提示语音，并通过具体的反馈电路反馈至电话外线。从而使控制者对电器的操作达到交互式控制，使其及时了解有关的信息；显示电路用于状态设置时的显示；控制电路接口部分可通过接不同的设备从而达到功能的扩展。

系统的振铃检测、模拟摘挂机、语音反馈、双音频DTMF解码等接口电路都已经在实际产品中经过交换机在线实验，具有很强的实用性。系统使用最简单的电路、最便宜的电路芯片实现了完善的功能。本系统还有许多可以添加的功能，具有很强的市场前景。

 

关键词：单片机；电话远程控制；双音频解码 

 

With the rapid development of integrated circuits, single-chip applications tend to miniaturization, applied to a small integrated chip circuit, so that the application of single-chip to get a greater play. Most of the early Internet technology used in the commercial field as information transmission, but now also began to more and more to the field of industrial control development. SCM is widely used in industrial control and electrical products with its small size, strong function, flexible and reliable, and remote control is one of its important applications. Today, the microcontroller also began to the direction of the development of the Internet, in order to achieve remote control. If the microcontroller serial port and the modem connection, which can be achieved with the remote computer to communicate, thus forming a new remote control program. But this program must take into account the line layout and communication transmission of the various difficulties, but also take into account the realization of the internal program and so on.

 The main control part of the telephone intelligent remote control is composed of single-chip microcomputer, carries on the main information processing, receives the various control signals formed by the external operation instruction, and completes the recording various information; The interface circuit provides the interface between the MCU and the telephone outside line. Including ringing detection, automatic pick up hook control, busy tone detection, dual audio DTMF decoding, and voice prompt circuit. The voice prompt circuit is an important part of the telephony controller. In order to reduce the cost of the device, the system tone will use the analog voice recording and playback module ISD4002. Voice prompt circuit by the microcontroller control to produce the corresponding prompt voice, and through a specific feedback circuit feedback to the outside of the phone. So that the control of the electrical operation of the electrical control to achieve a timely understanding of the relevant information; display circuit for the state set when the display; control circuit interface can be connected by different devices to achieve functional expansion.

System ringing detection, analog pick up hook, voice feedback, dual audio DTMF decoding and other interface circuits have been in the actual product through the switch online experiment, with a strong practicality. The system uses the simplest circuit, the cheapest circuit chip to achieve the perfect function. The system also has many features that can be added, with strong market prospects.

 

Key words: single chip computer; telephone remote control; dual audio decoding