标准摘要
[中文适用范围]： 本国际标准规定了使用分组网络的功能，该分组网络使用互联网协议（IP）作为其网络层协议，UDP和TCP作为其传输层协议，以互连两个专用综合业务网络交换机（PINX），形成专用综合业务网络交换机的一部分。 服务网络（PISN）。 通过直接在传输控制协议 (TCP) 上承载 PINX 间信令协议以及在实时传输协议 (RTP) 上承载 PINX 间用户信息（例如语音）来实现互连，RTP 通过用户数据报协议承载（UDP）。 PINX 间信令协议假定为 QSIG，如 ISO/IEC 11572、ISO/IEC 11582 和其他国际标准中所指定。 该国际标准提供了两种类型的互连： ——按需，在每次呼叫开始时建立 QSIG 的单独 TCP 连接，并在该呼叫结束时清除； ——半永久，其中具有无限生命周期的单个 TCP 连接代表许多单个调用携带 QSIG。 该国际标准适用于可以使用 QSIG 作为 PINX 间信令协议互连形成 PISN 的 PINX。 [外文原描述]： ISO/IEC 21992:2003(E) specifies functions for using a packet network that uses the Internet Protocol (IP) as its network layer protocol and UDP and TCP as its transport layer protocols, to interconnect two Private Integrated services Network eXchanges (PINXs) forming part of a Private Integrated Services Network (PISN). Interconnection is achieved by carrying the inter-PINX signalling protocol directly over the Transmission Control Protocol (TCP) and inter-PINX user information (e.g. voice) over the Real-time Transport Protocol (RTP), RTP being carried over the User Datagram Protocol (UDP). The inter-PINX signalling protocol is assumed to be QSIG, as specified in ISO/IEC 11572, ISO/IEC 11582 and other International Standards. ISO/IEC 21992:2003(E) provides for two types of interconnection: on-demand, where a separate TCP connection for QSIG is established at the start of each call and cleared down at the end of that call; andsemi-permanent, where a single TCP connection with an indefinite lifetime carries QSIG on behalf of many single calls. ISO/IEC 21992:2003(E) is applicable to PINXs that can be interconnected to form a PISN using QSIG as the inter-PINX signalling protocol.
英文名称Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Mapping functions for the tunnelling of QSIG through IP networks