【作者】 彭裕军；

【导师】 刘宏立；

【作者基本信息】 湖南大学 ， 电路与系统， 2007， 硕士

【摘要】 近年来,我国通信技术的发展势头十分迅猛。以电路交换和数字程控交换技术为基础的电话网更是在整个通信网中占据着重要的地位。面对信息时代的到来,人们在领略信息社会乐趣的同时,也遇到了新的挑战,学习和掌握程控交换技术已成为有关工程技术人员和广大青年学生迫切的需要。本论文在研读了大量的文献、参考相关设计的基础上,根据程控交换的基本原理,面向各高校实验室和相关研究单位,设计了基于ARM的程控交换实验系统,本实验系统以ARM+CPLD为控制系统,按照功能不同进行模块化设计,在本实验系统上能够完成程控交换中的大部分基础性实验以及一些和程控交换编程调试相关的实验。本实验系统由硬件和软件两部分组成,硬件包括CPU控制电路、用户接口电路、交换网络、中继电路、信号音产生电路、双音多频电路、彩铃电路以及LCD显示电路等部分。软件包括基本级程序、周期级程序,在最后还对LCD显示部分的uC/GUI程序进行了介绍,通过硬件和软件结合完成了人工交换、空分交换、时分交换、数字中继接口以及彩铃等各种实验。本套实验系统目前已经投入使用,与其它程控交换实验系统相比,本实验系统提供了丰富的扩展口,实验者可以自行进行扩展实验,同时,本实验系统人机交互界面友好,操作简单方便。更多还原

【Abstract】 Recently, the communication technology has advanced rapidly in our country. The telephone network based on circuit-switch and digital program controlled exchange technology plays an important role in the whole communication network. As following the coming of information age, people enjoy the pleasure of the information society, at the same time, also has encountered many new challenges. It is very necessary to learn and master program controlled exchange technology for engineers and college students.This paper is based on a lot of literatures and relative design schemes. According to the principle of program controlled switch, an experimental system based on ARM has been designed mainly for the library of high school and other related institute. The union of ARM and CPLD is the main controller system, and the other model is designed for different function division. Most part of basic experiment can be completed using this system, more over, some program debug experiment related with program switch also can be realized.This system is made up of two parts, hardware and software. The hardware includes CPU control part, subscriber line interface circuit, exchange network, trunk interface circuit, signal tone circuit, DTMF circuit, color ring back tone circuit, LCD display circuit and so on. The software also is made up of two parts, basic program and cycle program. At last, the uC/GUI program on the LCD display has been introduced. Many kinds of experiment can be accomplished, such as the artificial exchange, space division exchange, time division exchange, digital repeat, and coloring ring back tone.This system has been used in practice now. Compared with other experimental systems of program-switch, much more expansion interfaces have been provided. The customer can expand these interfaces by themselves. At the same time, the system also has other advantage, such as the good interface between the system and operator and easy operation.更多还原