信息技术.系统间的远程通信和信息交换.专业综合业务网.交换间信令协议.免打扰和免打扰最优先补充业务

[中文适用范围]： 本国际标准规定了在专用综合业务网络交换机（PINX）之间的 Q 参考点上支持请勿打扰和请勿打扰覆盖补充服务（SS-DND 和 SS-DNDO）的信令协议。 综合服务网络（PISN）。 SS-DND 是一项补充服务，它使受服务的用户能够使 PISN 拒绝任何呼叫，或者仅拒绝那些与指定的基本服务相关、寻址到受服务的用户的 PISN 号码的呼叫。 向主叫用户给出指示。 只要该服务处于活动状态，来电就会被拒绝。 受服务用户的外呼业务不受影响。 SS-DNDO 是一项补充服务，使服务用户能够在被叫号码上覆盖 SS-DND；也就是说，允许呼叫继续进行，就像被叫用户没有激活 SS-DND 一样。 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 14842 中第 1 阶段和第 2 阶段规范确定的要求。 SS-DND(O) 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 11572 中规定的补充服务。 IEC 11582。 该国际标准还规定了支持 SS-DND 与其他补充服务和 ANF 之间以及 SS-DNDO 与其他补充服务和 ANF 之间 Q 参考点交互的附加信令协议要求。 注 - 对 Q 参考点的信令协议没有影响的附加交互可以在相关的第 1 阶段规范中找到。 本国际标准适用于可以互连形成 PISN 的 PINX。 [外文原描述]： ISO/IEC 14844:2003 specifies the signalling protocol for the support of the Do Not Disturb and Do Not Disturb Override supplementary services (SS-DND and SS-DNDO) at the Q reference point between Private Integrated services Network eXchanges (PINXs) connected together within a Private Integrated Services Network (PISN). SS-DND is a supplementary service which enables a served user to cause the PISN to reject any calls, or just those associated with a specified basic service, addressed to the served user's PISN number. The calling user is given an indication. Incoming calls are rejected as long as the service is active. The served user's outgoing service is unaffected. SS-DNDO is a supplementary service which enables a served user to override SS-DND at a called number; that is, to allow the call to proceed as if the called user had not activated SS-DND. 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 14844:2003 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 14842. The signalling protocols for SS-DND(O) operate on top of the signalling protocol for basic circuit switched call control, as specified in ISO/IEC 11572, and use certain aspects of the generic procedures for the control of supplementary services specified in ISO/IEC 11582. ISO/IEC 14844:2003 also specifies additional signalling protocol requirements for the support of interactions at the Q reference point between SS-DND and other supplementary services and ANFs and between SS-DNDO and other supplementary services and ANFs.