信息技术.系统间通信和信息交换.个人综合业务网.交换间信令协议.呼叫识别和呼叫链接附加网络特性

[中文适用范围]： 本国际标准规定了在专用综合业务网络 (PISN) 内连接在一起的专用综合网络业务交换机 (PINX) 之间的 Q 参考点处支持呼叫识别和呼叫链接附加网络功能 (ANF-CIDL) 的信令协议。 ANF-CIDL 是一项附加网络功能，允许分配全局呼叫标识 (GID)，以识别呼叫路由上端到端的呼叫（即两端 PINX 之间）。 作为一个选项，线程标识（TID）可以被分配给由于其他补充服务和/或ANF的操作而逻辑链接在一起的不同调用。 此外，还可以分配线路标识 (LID)，以识别呼叫的不同线路。 注 1 – 本 ANF 的开发是为了支持在网络环境（即 PISN）中使用 CSTA（ISO/IEC 18051）。 不排除将该 ANF 用于其他应用。 Q 参考点在 ISO/IEC 11579-1 中定义。 补充服务规范按照 ETS 300 387 中指定的方法分三个阶段生成。 本国际标准包含 Q 参考点的第 3 阶段规范，并满足 ISO/IEC 21888 中第 1 阶段和第 2 阶段规范确定的要求ANF-CIDL 的信令协议在用于基本电路交换呼叫控制的信令协议之上运行（如 ISO/IEC 11572 中所规定），并使用通用过程的某些方面来控制 ISO/IEC 11582 中规定的补充服务该国际标准还规定了支持呼叫识别和呼叫链接以及其他补充服务和 ANF 之间 Q 参考点交互的附加信令协议要求。 本国际标准适用于可以互连形成 PISN 的 PINX。 [外文原描述]： This International Standard specifies the signalling protocol for the support of the Call Identification and Call Linkage Additional Network Feature (ANF-CIDL) at the Q reference point between Private Integrated Network Services Exchanges (PINXs) connected together within a Private Integrated Services Network (PISN). ANF-CIDL is an additional network feature which allows the assignment of a Global Call Identification (GID) to identify a call end-to-end over the call route (i.e. between the two end PINXs). As an option, a Thread Identification (TID) may be assigned to different calls which are logically linked together due to the operation of other supplementary services and/or ANFs. Additionally a Leg Identification (LID) may be assigned, to identify the different legs of a call. NOTE 1 - This ANF has been developed to support the use of CSTA (ISO/IEC 18051) in a networked environment, i.e. in a PISN. Use of this ANF for other applications is not precluded. The Q reference point is defined in ISO/IEC 11579-1. Supplementary Service specifications are produced in three stages and according to the method specified in ETS 300 387. This International Standard contains the stage 3 specification for the Q reference point and satisfies the requirements identified by the stage 1 and stage 2 specifications in ISO/IEC 21888. The signalling protocol for ANF-CIDL operates on top of the signalling protocol for basic circuit switched call control, as specified in ISO/IEC 11572, and uses certain aspects of the generic procedures for the control of supplementary services specified in ISO/IEC 11582. This International Standard also specifies additional signalling protocol requirements for the support of interactions at the Q reference point between Call Identification and Call Linkage and other supplementary services and ANFs. This International Standard is applicable to PINXs which can be interconnected to form a PISN.