It is a common problem for the designer to exchange data in different layers and use which kind of granularity in multi-layers architecture software system.
在多层架构的分布式软件系统中，如何在层间交换数据，采用何种粒度的对象交换数据，是系统构建时经常遇到的问题。
This paper reports a multi-feature stored program controlled (SPC) switching system which has voice and data exchange feature and multi-interface.
本文介绍一种具有话音和数据交换功能且具有多种用户接口的多功能交换系统。
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