标准摘要
[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 参考点支持呼叫优先中断（SS-CPI）和呼叫优先中断保护（SS-CPIP）补充业务的信令协议。 专用综合服务网络（PISN）。 注 1 – 本国际标准的该版本不适用于使用电路模式多速率承载服务的呼叫。 SS-CPI允许在没有可用用户信息信道的情况下成功地进行优先呼叫的呼叫请求。 这是通过强制释放已建立的较低优先级呼叫来实现的。 SS-CPIP 可以保护呼叫免受优先呼叫的干扰。 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 15991 中第 1 阶段和第 2 阶段规范确定的要求。 SS-CPI(P) 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-CPI(P) 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 2 – 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 15992:2003 specifies the signalling protocol for the support of the Call Priority Interruption (SS-CPI) and Call Priority Interruption Protection (SS-CPIP) supplementary services at the Q reference point between Private Integrated services Network eXchanges (PINXs) connected together within a Private Integrated Services Network (PISN). NOTE This edition of ISO/IEC 15992:2003 does not apply to calls using the circuit-mode multiple rate bearer service. SS-CPI allows a call request for a priority call to proceed successfully in the case that there is no user information channel available. This is accomplished by force releasing an established call of lower priority. SS-CPIP allows for the protection of calls against interruption from priority calls. 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 15992:2003 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 15991. The signalling protocol for SS-CPI(P) 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 15992:2003 also specifies additional signalling protocol requirements for the support of interactions at the Q reference point between SS-CPI(P) and other supplementary services and ANFs.
英文名称Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Inter-exchange signalling protocol - Call Priority Interruption and Call Priority Interruption Protection supplementary services