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为了解我国对窄带ISDN业务的近期实际需求和潜在市场,有关部门在京、沪、穗三城市对ISDN业务做了缜密的调查研究。本文摘要介绍此次调查的部分结果。
In order to understand the recent actual demand and potential market of narrowband ISDN services in our country, relevant departments made careful investigation on ISDN services in Beijing, Shanghai and Guangzhou. This article summarizes some of the results of this survey.