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信息化迅猛发展已迫切要求有线电视网络从单一的传统功能向综合化服务发展，网络的升级换代已在所必然。上海市政府决定把上海有线电视双向接入网的改造工程列为市基础设施建设重大工程，并由政府牵头，多方筹资，网络升级不收用户费用，此项工程在沪已全面展开。网络升级后可
The rapid development of information technology has urgently required that cable television networks develop from a single traditional function to a comprehensive service. The upgrade of the network is inevitable. The Shanghai Municipal Government decided to regard the renovation of Shanghai CATV bidirectional access network as a major project of municipal infrastructure construction. The government took the lead and raised funds from various sources and the network upgrade would not charge users fees. This project has been fully launched in Shanghai. After the network upgrade