信息技术.系统间远程通信和信息交换.专用综合服务网.互换信令协议.呼叫请求补充业务

[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业务网络交换局（PINX）之间的 Q 参考点处支持呼叫请求补充业务（SS-MCR）的信令协议。 补充服务MCR使得请求用户能够请求合作用户建立到目的地用户的新的请求呼叫。 协作用户和目的地用户之间的这个新请求的呼叫可以是基本呼叫或呼叫独立信令连接。 Q 参考点在 ISO/IEC 11579-1 中定义。 服务规范按照 ETS 300 387 中指定的方法分三个阶段制定。 本国际标准包含 Q 参考点的第 3 阶段规范，并满足 ISO/IEC 20113 中第 1 阶段和第 2 阶段规范确定的要求。 SS-MCR 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额外的信令协议要求，以支持 SS-MCR 和其他补充业务和 ANF 之间 Q 参考点的交互。 本国际标准适用于 PINX，它们可以互连形成 PISN。 [外文原描述]： ISO/IEC 20114:2004 specifies the signalling protocol for the support of the Make Call Request supplementary service (SS-MCR) at the Q reference point between Private Integrated services Network eXchanges (PINXs) connected together within a Private Integrated Services Network (PISN). Supplementary service MCR enables a Requesting User to request a Co-operating User to establish a new Requested Call to a Destination User. This new Requested Call between the Co-operating and Destination User can be either a Basic call or a Call Independent Signalling Connection. The Q reference point is defined in ISO/IEC 11579-1. Service specifications are produced in three stages and according to the method specified in ETS 300 387. ISO/IEC 20114:2004 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 20113. The signalling protocol for SS-MCR 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. ISO/IEC 20114:2004 also specifies additional signalling protocol requirements for the support of interactions at the Q reference point between SS-MCR and other supplementary services and ANFs. ISO/IEC 20114:2004 is applicable to PINXs, which can interconnect to form a PISN.