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在过去十年间,为将数据和话音业务经济地综合在单一系统一综合业务数字网(ISDN)中提供了时机。CCITT的研究已导致形成了一批涉及ISDN各个方面的包括用户终端接口的建议。建议用于各专用数据网的用户终端接口与用于ISDN的用户终端接口之间必然存在着明显的差别。为了确保尽可能顺利地引入ISDN基本业务,CCITT已发表一批描述现有的终端接口设计如何才能接到ISDN的建议。这些建议是本文的主题。
Over the past decade, it has provided the opportunity to cost-effectively consolidate data and voice over a single system-integrated services digital network (ISDN). CCITT research has resulted in the formation of a number of recommendations covering all aspects of ISDN, including user terminal interfaces. There is an obvious difference between the user terminal interface proposed for each private data network and the user terminal interface used for ISDN. In order to ensure the best possible introduction of ISDN basic services, CCITT has published a number of recommendations describing how existing terminal interface designs can be connected to ISDN. These suggestions are the subject of this article.