ISO/IEC 23290:2004 信息技术 系统之间的电视和数据交换-私人综合服务网络 （PISN）-通过H.323网络的QSIG隧道效应的映射功能

标准编号：ISO/IEC 23290:2004

中文名称：信息技术 系统之间的电视和数据交换-私人综合服务网络 （PISN）-通过H.323网络的QSIG隧道效应的映射功能

英文名称：Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network (PISN) — Mapping functions for the tunnelling of QSIG through H.323 networks

发布日期：2004-10

标准范围

ISO/IEC 23290:2004规定了用于使用H.323分组网络来互连形成专用综合业务网络(PISN)的一部分的两个专用综合业务网络交换机(PINX)的功能。通过在H.323呼叫信令信道上携带inter-PINX信令协议，利用H.323的协议隧道设施，以及在通过H.323建立的逻辑信道上携带inter-PINX用户信息(例如语音)来实现互连。每个逻辑信道通常表示借助于实时传输协议(RTP)传送的单向媒体流。PINX间信令协议被假定为QSIG，如ISO/IEC 11572、ISO/IEC 11582和其他国际标准中所规定的。323呼叫在每个PISN呼叫开始时建立，并在该呼叫结束时清除。半永久场景被描述为附加选项，其中具有无限寿命的单个H.323呼叫代表许多PISN呼叫携带QSIG。在ISO/IEC 23290:2004所涵盖的场景中，参与呼叫的PINX不一定知道提供互连的H.323网络，并且可用的特征是QSIG网络的特征。这与使用QSIG和H.323之间的真正互通(即QSIG-H.323-QSIG)来连接两个PISN或同一PISN的两个部分的场景不同。在后一种情况下，所有网络以平等的条件参与呼叫，并且特征限于在所有网络中可用并且由网关支持的那些特征。后一种情况超出了本文档的范围。ISO/IEC 23290:2004适用于可以使用QSIG作为PINX间信令协议互连以形成PISN的PINX。

ISO/IEC 23290:2004 specifies functions for using an H.323 packet network in order 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 over the H.323 call signalling channel, making use of the protocol tunnelling facilities of H.323, and inter-PINX user information (e.g. voice) over logical channels established through H.323. Each logical channel usually represents a unidirectional media stream conveyed by means of the Real-time Transport Protocol (RTP). 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 23290:2004 provides for an on-demand type of interconnection, where a separate H.323 call is established at the start of each PISN call and cleared down at the end of that call. A semi-permanent scenario where a single H.323 call with an indefinite lifetime carries QSIG on behalf of many PISN calls is described as an additional option.

In the scenarios covered in ISO/IEC 23290:2004, the PINXs participating in a call are not necessarily aware of the H.323 network providing the interconnection, and the features available are those of the QSIG network. This is different from a scenario where true interworking between QSIG and H.323 (i.e. QSIG-H.323-QSIG) is used to connect two PISNs or two parts of the same PISN. In this latter case, all networks participate in a call on equal terms, and features are limited to those available in all networks and supported by the gateways. This latter scenario is outside the scope of this document.

ISO/IEC 23290:2004 is applicable to PINXs that can be interconnected to form a PISN using QSIG as the inter-PINX signalling protocol.

标准预览图