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我们经常从各类媒体上见到ＩＳＤＮ的介绍，相对于５６Ｋｂｐｓ的Ｍｏｄｅｍ，ＩＳＤＮ高达１２８Ｋｂｐｓ的速率真是让人心动，电话、上网两不误的特点更是非常实用。现在很多地方的电信局已经开通了此项业务我们为什么不来享受一下ＩＳＤＮ呢？
We often see the introduction of ISDN from all kinds of media. Compared with 56Kbps Modem, the rate of ISDN up to 128Kbps is really exciting. The features of telephone and Internet access are more practical. Now that the telecommunication bureau in many places has already started this business, why do not we enjoy ISDN?