本国际标准规定了“QSIG”和“H.323”之间的信令互通，以支持通用功能 企业电信网络（CN）内补充业务的程序。 “QSIG”是一种信令协议，在专用综合业务交换机（PINX）之间的Q参考点运行 在专用综合服务网络（PISN）内。ISO/IEC 11579-1中定义了Q参考点。PISN提供 向用户提供的电路交换基本业务和补充业务。QSIG在其他标准中有规定，尤其是 ISO/IEC 11572（支持基本服务的呼叫控制）、ISO/IEC 11582（支持基本服务的通用功能协议） 补充服务）和一系列规定个别补充服务的标准。 “H.323”是一组信令协议，用于支持分组网络内的语音或多媒体通信，例如: 一种使用互联网协议（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关守护者间接运行，也可以直接运行。终点 可以是另一个网络的终端或网关。323是一个“伞式”建议，指的是各种ITU-T 建议，尤其是建议H.225.0和H.245（基本通信能力）以及 建议H.450.1（支持补充服务的通用功能协议）。 注-H.450.1适用于1998版的H.323（也称为H。 323版本2）和更高版本。 QSIG和H.323之间的互通允许在PISN用户处发起的呼叫在IP网络的用户处终止，或 在IP网络的用户处发起以在PISN的用户处终止的呼叫。此外，本国际标准使 呼叫的参与者以通用方式交换补充业务控制信息。更具体的方面 其他标准中规定了互通特定补充业务。 本国际标准适用于任何可作为采用QSIG的PISN之间网关的互通单元 以及采用H.323的IP网络。

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.