信息技术.系统间远程通信和信息交换.计算机支持远程通信应用(CSTA)阶段Ⅲ的服务

[中文适用范围]： 本国际标准规定了计算机支持的电信应用的服务和事件报告，第三阶段（CSTA）。 该国际标准的重点是为交换功能、计算功能和特殊资源功能提供应用服务接口。 CSTA应用接口与CSTA应用可以服务、观察或操纵的各种用户网络接口和网络网络接口分离。 由于CSTA间接地与现有电信接口一起操作，因此它的操作是通用的，因此各种现有接口之间的差异对CSTA应用程序来说是隐藏的。 对用户到网络接口的支持超出了 CSTA 的范围。 尽管大多数终端设备 (TE) 适合与 CSTA 一起使用，但也存在 TE 不适合某些情况的情况。 例子是： ?当双方在呼叫建立期间通过 CSTA 发出警报时，传真终端和调制解调器无法调整其传输模式以防止运营商冲突； ？在交换功能控制之外执行电信功能的功能终端。 本国际标准中定义的服务允许计算网络和电信网络之间的功能集成。 支持此类功能集成应用程序的计算平台（即应用程序编程接口 - API）不属于本国际标准的范围。 计算和交换（即，电信）网络之间的通信可以经由范围从简单的点对点连接到局域或广域电信网络的中间网络进行。 本国际标准是 CSTA 标准和技术报告套件的一部分，这些标准和技术报告提供了对应用、实施和利用基于 CSTA 的计算机电话集成 (CTI) 应用程序所涉及的体系结构和实际问题的全面描述。 [外文原描述]： ISO/IEC 18051:2007 specifies the Services and Event Reports for Computer-Supported Telecommunications Applications, Phase III (CSTA). ISO/IEC 18051:2007 is focused on providing application service interfaces to a Switching Function, Computing Function and a Special Resource Function. A CSTA application interface is disassociated from the various user-network interfaces and network-network interfaces CSTA applications may serve, observe or manipulate. Because CSTA operates with existing telecommunications interfaces indirectly, it operates generically, so that differences among various existing interfaces are hidden from CSTA applications. Support of user-to-network interfaces is outside the scope of CSTA. Although most terminal equipment (TE) is suitable for use with CSTA, there will be instances of TE that will not be suitable in certain circumstances. Examples are: FAX terminals and modems that are unable to adjust their transmission modes to prevent carrier conflict when both parties are alerted via CSTA during call establishment; functional terminals that perform telecommunication functions outside the control of the Switching Function. Services defined in ISO/IEC 18051:2007 allow functional integration between a computing network and a telecommunications network. Computing platforms (i.e. application programming interfaces - APIs) that support such functionally-integrated applications are outside the scope of ISO/IEC 18051:2007. Communication between the computing and switching (i.e. telecommunications) networks may take place via intervening networks ranging from simple point-to-point connections to local- or wide-area telecommunications networks. ISO/IEC 18051:2007 is part of a suite of CSTA Standards and Technical Reports that provide a comprehensive description of the architectural and practical issues involved in applying, implementing, and utilizing CSTA-based computer telephony integration (CTI) applications.