标准摘要
[中文适用范围]： 本国际标准规定了补充业务简单对话（SS-SD），适用于专用综合业务网络（PISN）支持的各种基础业务。 ISO/IEC 11574 中规定了基本服务。 补充服务 SD 使用户能够通过交换键盘与其他用户或应用程序进行通信，并通过 PISN 透明地显示信息。 根据 ETS 300 387 中描述的方法，服务规范分三个阶段制定。 该国际标准包含 SS-SD 的第 1 阶段和第 2 阶段规范。 第一阶段规范（第 6 条）指定了 PISN 用户所看到的补充服务。 第2阶段规范（第7条）规定了补充服务中涉及的功能实体以及它们之间的信息流。 [外文原描述]： This International Standard specifies the supplementary service Simple Dialog (SS-SD), which is applicable to various basic services supported by Private Integrated Services Networks (PISNs). Basic services are specified in ISO/IEC 11574. Supplementary service SD enables a user to communicate with another user or application by the exchange of keypad and display information transparently over a PISN. Service specifications are produced in three stages, according to the method described in ETS 300 387. This International Standard contains the stage 1 and stage 2 specifications of SS-SD. The stage 1 specification (clause 6) specifies the supplementary service as seen by users of PISNs. The stage 2 specification (clause 7) specifies the functional entities involved in the supplementary service and the information flows between them.
英文名称Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Specification, functional model and information flows - Simple dialog supplementary service