标准摘要
[中文适用范围]： 本国际标准规定了在宽带专用综合业务网络（B-PISN）内连接在一起的专用综合业务网络交换机（PINX）之间的 Q 参考点处支持转接柜台附加网络功能（ANF-TC）的信令协议。 ANF-TC 是一种限制呼叫/连接建立请求可路由通过的传输 PINX 数量的功能，例如，以保护网络免受无限循环的影响。 Q 参考点在 ISO/IEC 11579-1 中定义。 服务规范按照 CCITT Rec 中指定的方法分三个阶段制定。 I.130。 该国际标准包含 Q 参考点的第 3 阶段规范，并满足 ISO/IEC 15055 中第 1 阶段和第 2 阶段规范确定的要求。 ANF-TC 的信令协议与基本呼叫/呼叫的信令协议联合运行。 连接控制（如 ISO/IEC 13247 中指定）和呼叫独立（面向连接）信令连接（如 ECMA-254 中指定）。 本国际标准适用于可以互连形成 PISN 的 PINX。 [外文原描述]： This International Standard specifies the signaling protocol for the support of the Transit Counter additional network feature (ANF-TC) at the Q reference point between Private Integrated Services Network Exchanges (PINXs) connected together within a Broadband Private Integrated Services Network (B-PISN). ANF-TC is a feature that limits the number of Transit PINXs that a call/connection setup request may be routed through e.g., to protect the network against indefinite looping. 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 CCITT Rec. I.130. This International Standard 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 15055. The signaling protocol for ANF-TC operates in association with the signaling protocols for basic call/connection control (as specified in ISO/IEC 13247) and call independent (connection oriented) signaling connections (as specified in ECMA-254). This International Standard is applicable to PINXs that can interconnect to form a PISN.
英文名称Information technology - Telecommunications and information exchange between systems - Broadband Private Integrated Services Network - Inter-exchange signalling protocol - Transit counter additional network feature