信息技术.系统间远程通信和信息交换.专用综合业务网.交换间信令协议.呼叫转移补充业务

[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机（PINX）之间的 Q 参考点处支持呼叫转移补充业务（SS-DIV）的信令协议。 呼叫转移补充业务包括无条件呼叫前转（SS-CFU）、遇忙呼叫前转（SS-CFB）、无应答呼叫前转（SS-CFNR）和呼叫偏转（SS-CD）。 SS-CFU、SS-CFB、SS-CFNR 和 SS-CD 是补充服务，允许所服务的用户让 PISN 将所有或特定的拨入所服务用户的 PISN 号码的传入呼叫发送到另一个号码。 Q 参考点在 ISO/1EC 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 13872 中第 1 阶段和第 2 阶段规范确定的要求。 SS-DIV 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 ISO/IEC 11582 中规定的用于控制补充服务的通用过程的某些方面。 国际标准还规定了额外的信令协议要求，以支持 SS-DIV 与其他补充服务和 ANF 之间 Q 参考点的交互。 本国际标准适用于可以互连形成 PISN 的 PINX。 [外文原描述]： ISO/IEC 13873:2003 specifies the signalling protocol for the support of Call Diversion supplementary services (SS-DIV) at the Q reference point between Private Integrated services Network eXchanges (PINXs) connected together within a Private Integrated Services Network (PISN). The Call Diversion supplementary services are Call Forwarding Unconditional (SS-CFU), Call Forwarding Busy (SS-CFB), Call Forwarding No Reply (SS-CFNR) and Call Deflection (SS-CD). SS-CFU, SS-CFB, SS-CFNR and SS-CD are supplementary services which permit a served user to have the PISN send all or specific incoming calls addressed to the served user's PISN number to another number. 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 13873:2003 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 13872. The signalling protocol for SS-DIV 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 13873:2003 also specifies additional signalling protocol requirements for the support of interactions at the Q reference point between SS-DIV and other supplementary services and ANFs. ISO/IEC 13873:2003 is applicable to PINXs which can be interconnected to form a PISN.