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随着电信经济建设的发展，各种新的技术、新的设备应用到通信建设上来，实现了人工向自动交换网的转换，并由模拟技术向数字技术过渡，光缆传输从明线为主发展到光缆、数字微波和电缆的综合利用，基础设施、职工住宅楼的建设越来越多，各种科研、技术革新也大量增加。这样，科
With the development of telecom economy, all kinds of new technologies and new equipments are applied to the communication construction, and the conversion from artificial to automatic switching network is realized. The transition from analog technology to digital technology is carried out. The comprehensive utilization of optical cables, digital microwaves and cables, the construction of infrastructures and workers’ residential buildings are increasing, and various scientific research and technological innovations have also increased substantially. In this way, Section