ISO/IEC 15992:2003 信息技术 系统间的无线电通信和信息交换 专用集成服务网络 内部交换信号协议 呼叫优先中断和呼叫优先中断保护辅助设备.

标准编号：ISO/IEC 15992:2003

中文名称：信息技术 系统间的无线电通信和信息交换 专用集成服务网络 内部交换信号协议 呼叫优先中断和呼叫优先中断保护辅助设备.

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 Pr

发布日期：2003-04

标准范围

ISO/IEC 15992:2003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(PINXs)之间的Q参考点处支持呼叫优先中断(SS-CPI)和呼叫优先中断保护(SS-CPIP)补充业务的信令协议。注:此版本的ISO/IEC 15992:2003不适用于使用电路模式多速率承载业务的呼叫。SS-CPI允许在没有用户信息信道可用的情况下成功进行优先呼叫的呼叫请求。这是通过强制释放较低优先级的已建立呼叫来实现的。SS-CPIP允许保护呼叫免受优先级呼叫的中断。Q参考点定义在ISO/IEC 11579-1.根据ETS 300 387中规定的方法，分三个阶段制定服务规范。ISO/IEC 15992:2003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。用于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，如在ISO/IEC 11572中所规定的，并且使用用于控制在ISO/IEC 11582中所规定的补充业务的通用过程的某些方面。ISO/IEC 15992:2003还规定了用于支持在Q参考点处SS-CPI(P)和其他补充业务与ANF之间的交互的附加信令协议要求。

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.

标准预览图