电话网是整个通信网的基础，由长途网和本地网两部分组成，电话网路结构直接影响通信的服务质量、水平和效益。了解电话网路结构的演变与发展趋势，有助于我们站在全程全网的高度，有针对性地加强网络组织管理，不断提高网络设计、运营和管理的技术和水平。下面就我国长途电话 The telephone network is the basis of the whole communication network, which is composed of the long distance network and the local network. The telephone network structure directly affects the service quality, level and benefit of the communication. Understanding the evolution and development trend of the telephone network structure will help us to stand at the height of the entire network and enhance the management of network organizations in a targeted manner so as to continuously improve the technology and level of network design, operation and management. Here’s my long distance call