关于最后一公里技术,人们已经讨论得太多、太多。我们可以谈论电缆和 DSL,但事实上我们现在可以从邮电部门买到的是 ISDN。ISDN 的64Kbps 和128Kbps B 信道速率也非常适合那些希望得到比拨号调制解调器更高带宽的 Internet 用户。ISDN 起源于70年代的欧洲,其发展经历了漫长而曲折的历程。直至1993年底,由22个欧洲电信运营部门发起的欧洲 ISDN 标准才最终得到统一,这开创了ISDN 发展史上的新纪元。目前欧洲 ISDN 标准已逐渐成 People have talked too much, too much about the last kilometer of technology. We can talk about cables and DSLs, but in fact we can now buy ISDN from the post and telecommunications department. ISDN’s 64Kbps and 128Kbps B channel rates are also ideal for Internet users who want higher bandwidth than dial-up modems. ISDN originated in the 70’s in Europe, its development has gone through a long and tortuous course. Until the end of 1993, European ISDN standards initiated by 22 European telecom operators were finally unified, which set a new era in the history of ISDN. The current European ISDN standards have gradually become