浅谈通信网的现状与发展（上）蔡庆随着通信的不断发展，通信网的终端设备、传输设备、交换设备及网路组织规模和功能等方面都正朝着数字化、智能化的方向发展。关于网路组织的发展过程，如图１所示。未来通信网的发展方向已被公认为是综合业务数字网（ＩＳＤＮ），它由电... Talking about the Current Situation and Development of Communication Network (Part 1) Cai Qing With the continuous development of communication, the terminal equipment, transmission equipment, switching equipment and network organization scale and function of communication network are all moving in the direction of digitization and intelligence. Network organization on the development process, as shown in Figure 1. The future direction of the development of communications networks has been recognized as Integrated Services Digital Network (ISDN), which consists of electricity ...