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上网,为的就是能够“多快好省”的获得有用信息,可是使用常用的电话线路Modem限制传输速度,采用DDN等费用太贵。所以“价廉物美”的ISDN(综合业务数字网,在国内俗称“一线通”)越来越受重视。上海作为重要的经济、金融、商务中心,由于政策扶持和“CHINANET”、“上海热线”等的大力支持,ISDN业务蓬勃发展,ISDN正在逐步进入百姓家。为此特选登本文向读者朋友介绍ISDN工作原理及选购常识。
Internet, in order to be able to “get better” save useful information, but the use of commonly used telephone lines Modem limit transmission speed, the use of DDN and other costs too expensive. Therefore, “cheap” ISDN (Integrated Services Digital Network, commonly known in the country as “One Touch”) more and more attention. As an important economic, financial and commercial center, Shanghai has flourished its ISDN business due to policy support and strong support from the “CHINANET” and “Shanghai Hotline.” ISDN is gradually entering the people’s home. Selected texts for this readers to readers ISDN principle of work and buy common sense.