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提到ISDN(综合业务数据网络),多数人总是批评,认为它会被性能更优越、价格更便宜的技术所取代。然而,在近20年的期盼之后,为什么ISDN又被广泛接受了呢? 在美国,安装ISDN的热潮始于一年半到两年以前。目前,在全球范围内有800万条ISDN线路。ISDN的复活主要归功于以下原因:应用和性能、技术趋势以及市场需求。确切地说,ISDN是指一组能够被最终用户所获取的数字业务的集合,其宗旨是将电话
When it comes to ISDN (Integrated Services Digital Network), most people are always criticized for thinking it will be replaced by better performing, less expensive technologies. However, after nearly 20 years of expectations, why is ISDN widely accepted? In the United States, ISDN fever started in a year and a half to two years ago. Currently, there are 8 million ISDN lines worldwide. The revival of ISDN is mainly due to the following reasons: application and performance, technology trends and market demand. Specifically, ISDN refers to a collection of digital services that can be acquired by end users with the purpose of placing a phone