上海通信网科技含量明显提高近两年来，依靠科技进步，上海市通信网发生了量和质的巨大变化，网络规模不断扩大，通信能力明显增强，通信网的技术层次超越了一些发达国家通信发展的传统阶段。现代通信网络是一个科技含量很高的网络，目前上海已初步建成了包括光缆、数字微... Over the past two years, relying on scientific and technological progress, great changes have taken place in quality and quantity of communication networks in Shanghai. The network scale has been continuously expanded and the communication capability has been significantly enhanced. The technical level of communication networks has surpassed the development of communications in some developed countries The traditional stage. Modern communications network is a high technology network, Shanghai has now initially completed, including optical cable, digital micro ...