信息技术 系统间通信和信息交换 团体电信网 QSIG 和H.323之间信号互通 支持补充业务的一般功能协议

[中文适用范围]： 该国际标准规定了“QSIG”和“H.323”之间的信令互通，以支持企业电信网络（CN）内补充服务的通用功能过程。 “QSIG”是在专用综合业务网络(PISN)内的专用综合业务交换机(PINX)之间的Q参考点处运行的信令协议。 Q 参考点在 ISO/IEC 11579-1 中定义。 PISN 为其用户提供电路交换基本服务和补充服务。 QSIG 在其他标准中进行了规定，特别是 ISO/IEC 11572（支持基本服务的呼叫控制）、ISO/IEC 11582（支持补充服务的通用功能协议）以及指定各个补充服务的许多标准。 “H.323”是一组用于支持分组网络内语音或多媒体通信的信令协议，特别是使用网际协议(IP)作为其网络层协议(IP网络)的分组网络。 H.323 信令协议在 IP 网络中的端点之间运行，可以通过一个或多个网守间接运行，也可以直接运行。 端点可以是另一个网络的终端或网关。 H.323 是一个“伞”建议，指的是各种 ITU-T 建议，特别是建议 H.225.0 和 H.245（基本通信能力）以及建议 H.450.1（支持补充业务的通用功能协议）。 注 - H.450.1 适用于 1998 版 H.323（也称为 H.323 版本 2）及更高版本。 QSIG 和 H.323 之间的互操作允许源自 PISN 用户的呼叫终止于 IP 网络用户，或者源自 IP 网络用户的呼叫终止于 PISN 用户。 此外，该国际标准使呼叫参与者能够以通用方式交换补充服务控制信息。 其他标准中规定了特定补充服务互通的更具体方面。 本国际标准适用于任何可以充当采用 QSIG 的 PISN 和采用 H.323 的 IP 网络之间网关的互通单元。 [外文原描述]： This International Standard specifies signalling interworking between "QSIG" and "H.323" in support of generic functional procedures for supplementary services within a Corporate telecommunication Network (CN). "QSIG" is a signalling protocol that operates at the Q reference point between Private Integrated Services eXchanges (PINX) within a Private Integrated Services Network (PISN). The Q reference point is defined in ISO/IEC 11579-1. A PISN provides circuit-switched basic services and supplementary services to its users. QSIG is specified in other Standards, in particular ISO/IEC 11572 (call control in support of basic services), ISO/IEC 11582 (generic functional protocol for the support of supplementary services) and a number of standards specifying individual supplementary services. "H.323" is a set of signalling protocols for the support of voice or multimedia communication within a packet network, in particular a packet network that uses the Internet Protocol (IP) as its network layer protocol (IP network). H.323 signalling protocols operate between endpoints in an IP network, either indirectly via one or more gatekeepers, or directly. An endpoint can be a terminal or a gateway to another network. H.323 is an "umbrella" recommendation, referring to various ITU-T recommendations, in particular Recommendations H.225.0 and H.245 (basic communication capabilities) and Recommendation H.450.1 (generic functional protocol for the support of supplementary services). NOTE - H.450.1 applies to the 1998 version of H.323 (also known as H.323 version 2) and to later versions. Interworking between QSIG and H.323 permits a call originating at a user of a PISN to terminate at a user of an IP network, or a call originating at a user of an IP network to terminate at a user of a PISN. In addition this International Standard enables the participants of a call to exchange supplementary service control information in a generic way. The more specific aspects of interworking particular supplementary services are specified in other Standards. This International Standard is applicable to any interworking unit that can act as a gateway between a PISN employing QSIG and an IP network employing H.323.