我国的有线电视事业经过长期发展,已经成为一个拥有1亿有线电视用户的庞大产业,国家干线、省干线光纤网络发展迅速,许多地方的光纤网络已经通到了城市、乡镇和行政村。有线电视网络已经成为融合计算机、通讯等多种技术手段并为广大用户提供多元化、个性化服务的新型媒体。目前,许多地方正在进行有线电视网络升级改造,在当前这样一种新形势 After long-term development of China’s cable television industry, it has become a huge industry with 100 million cable television subscribers. The optical fiber networks of national trunk lines and provincial trunk lines have been developing rapidly. Optical fiber networks in many places have reached the cities, towns and administrative villages. Cable television networks have become a new type of media that integrates many technological means such as computers and communications and provides diversified and personalized services to customers. At present, many places are upgrading CATV networks. Under such a new situation at present