对通信网进行了简单的介绍，包括通信网的概念，传输与交换，网络体系结构，网络规划设计理论基础，排队论及其应用，电话通信网，数据网-A brief introduction, the communication network including the concept of communication network transmission and switching, network architecture, network planning and design theory, queuing theory and its applications, telephone communications network, data network