我国在历史上形成独立发展的公用电信网、有线电视网和计算机数据网，称为“三网”。它们之间互相连通和互相访问的技术正在发展，三网融合正在进行。随着信息产业部“三定方案”的实施，许多技术问题的解决，产业之间的交叉竞争和重组正在形成，有些企业和行业会失去原有的优 In history, our country has formed an independent development of public telecommunication networks, cable television networks and computer data networks, which are called “three networks.” The technologies in which they are connected and interoperable with each other are evolving and triple play is in progress. With the implementation of the “Three Plans” by the Ministry of Information Industry, the solution of many technical problems, the cross-competition and restructuring between industries, the formation of some enterprises and industries will lose their advantages