三网合一是指在未来的数字信息时代，当前的计 算机网将与电视网（含有线电视网）、电信网合而为一，并且合并的方向是传输、接收和处理全部实现数字化。 现阶段的主要技术问题 以三网合一为基础的Ｂ－ＩＳＤＮ若能同时传输语音、视频、数据等各种信息，必须具有很宽的网络带宽 Triple play means that in the future era of digital information, the current computer network will be combined with the television network (including cable television networks) and telecommunications networks, and the direction of consolidation will be all of transmission, reception and processing. The main technical issues at this stage to B-ISDN based on triple play If you can simultaneously transmit voice, video, data and other information, you must have a very wide network bandwidth