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ISDN 即综合业务数字网络,其目的是将目前四通八达的电话网络数字化,使其能提供包括话音和非话音(数据、视频和图像等)在内的承载和补充业务。以前说 ISDN,还只是纸上谈兵。但你知道吗,现在 ISDN 已经唾手可得。我国电信部门自1996年开始大力建设 ISDN 网络和推广应用方面的工作,目前全国有25个省会城市的长途电话交换机能提供 ISDN 业务,京沪穗三市的国际长途交换机也具备提供 ISDN 业务的能力。按照电
ISDN, an integrated services digital network, is designed to digitize the telephone network that is currently available in a wide range of areas, enabling it to provide bearer and supplementary services, including voice and non-voice (data, video and images). Used to say ISDN, it is only on paper. But you know, ISDN is now at your fingertips. Since 1996, China’s telecom department has vigorously built its ISDN network and popularized its application. At present, long distance telephone exchanges in 25 provincial capitals can provide ISDN services and international long distance switches in Beijing, Shanghai and Guangzhou have the ability to provide ISDN services . Follow the electricity