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有Ｎ─ＩＳＤＮ进行多媒体点播史敏锐今天，许多多媒体业务已经在高速通信网上进行试验，例如宽带ＩＳＤＮ（Ｂ—ＩＳＤＮ）可提供高清晰度的会议电视、ＶＯＤ等业务。但是Ｂ—ＩＳＤＮ目前还处于实验室阶段。业务标准资费政策还没有确定，因此一般消费者还不能使用。真正...
Today, many multimedia services have been tested on high-speed communications networks. For example, broadband ISDN (B-ISDN) provides high-definition video conferencing and VOD services. But B-ISDN is still in the laboratory stage at present. Business standard tariff policy has not been established, so the average consumer can not use. real...