本国际标准规定了支持补充业务和附加基本呼叫的功能协议 Q参考点的能力。Q参考点存在于专用综合业务网络交换机之间 （PINX）在专用综合业务网（PISN）内连接在一起，定义见ISO/IEC 11579-1。这个 通用功能协议是B-QSIG信号系统的一部分。 本国际标准中规定的程序可与承载连接（与承载相关）或 在任何承载连接的上下文之外（独立于承载）。本国际标准适用于个人 额外的基本呼叫能力和补充服务不在本国际标准的范围内，应 这些标准或专有规范中规定了各个功能。 本国际标准的所有符合性均基于Q参考点接口处的外部行为，即:。 按照本国际标准规定的正确顺序生成正确的消息结构。 通用功能协议基于ATM论坛规范AF-CS-0102.000，其本身基于DSS2 ITU-T Rec.Q.2932.1中规定的通用功能协议，但扩展到允许非本地信息交换以及 本地信息交换。 本国际标准适用于支持附加基本呼叫能力和/或补充业务的PINX 要求在Q参考点发送信号的功能协议。

This International Standard specifies the functional protocol for the support of supplementary services and additional basic call capabilities at the Q-reference point. The Q-reference point exists between Private Integrated services Network eXchanges (PINX) connected together within a Private Integrated Services Network (PISN) and is defined in ISO/IEC 11579-1. The generic functional protocol is part of the B-QSIG signalling system. The procedures specified in this International Standard can be used in association with a bearer connection (bearer-related) or outside the context of any bearer connection (bearer-independent).The application of this International Standard to individual additional basic call capabilities and supplementary services is outside the scope of this International Standard and should be defined in those standards or proprietary specifications that specify the individual capabilities. All conformance to this International Standard is based on the external behaviour at the interface at the Q-reference point, i.e. on the generation of the correct message structure and in the proper sequence as specified in this International Standard. The generic functional protocol is based on ATM Forum specification AF-CS-0102.000, which itself is based on the DSS2 generic functional protocol specified in ITU-T Rec. Q.2932.1 but extended to allow non-local information exchange as well as local information exchange. This International Standard is applicable to PINXs supporting additional basic call capabilities and/or supplementary services requiring the functional protocol for signalling at the Q-reference point.