摘 要随着时代不断发展，科技的不断进步，电话逐渐成为人们生活中不可或缺的工具。电话通信网是由用户终端设备、传输设备和交换设备组成。它由交换设备完成接续，使网内任一用户可与其他用户通信。而程控数字交换机是数字电话网、移动电话网以及综合业务数字网中的关键设备，在通信网中起着非常重要的作用。65854

本文主要论述了如何以客户机/服务器模式来模拟程控交换机的服务功能，客户机和服务器利用socket通信方式，采用JAVA语言编写,利用eclipse 、MySQL等工具通过网络服务器代替的程控交换机完成呼叫处理中经历的各个接续过程，利用客户机实现电话终端的呼叫功能。本程序反映了呼叫处理方法和处理过程中可能经历的各种状态如摘机，挂机，占线，关机，空号等，并能在通话过程中实现计时功能。

关键词：客户机/服务器，Socket通信，接续过程，呼叫状态 

Title  Call process based on network simulation

Abstract

With the continuous development of the times, technological advances, phone has become an indispensable tool in people's lives. Telephone communication network is determined by the user terminal equipment, transmission equipment and switching equipment. It consists of switching equipment to complete connection, so that any user within the network can communicate with other users. The program-controlled digital switch is a digital telephone network, mobile telephone networks and integrated services digital network in the key equipment in the communication network plays a very important role.

This article discusses how the client / server model to simulate PBX service functions, the client and server using socket communication, using JAVA language, the use of Eclipse, MySQL and other tools through a network server instead of the PBX to complete the call processing experienced by each succeeding process, the use of client implementations telephone terminal calling features. This program reflects the call processing methods and processing may experience various states such as off-hook, hook, busy, shutdown, empty number, etc., and can be implemented during a call timer function.

毕业设计说明书（论文）外文摘要

目   录

1  绪论 1

1.1  课题研究的主要内容 1

1.2  章节安排 1

1.3  本章小结 1

2  基本原理及技术介绍 2

2.1  程控交换技术概述 2

2.1.1  程控交换技术的基本概念 2

2.1.2  程控交换的发展历史 2

2.1.3  程控交换机的基本功能 3

2.1.4  程控交换机的基本构成 3

2.2  呼叫处理过程概述 5

2.2.1  呼叫的基本类型 5

2.2.2  呼叫处理的过程 6

2.2.3  实现利用网络模拟呼叫处理的基本方法 6

2.3  网络编程技术的介绍 6

2.3.1  网络编程技术的概述 6

2.3.2  网络通讯结构 7

2.3.3  网络通讯方式 7

2.4  网络编程步骤 8