信息技术 系统间通信和信息交换 PISNs 与 IP网络的互操作性

[中文适用范围]： 本技术报告的目的是调查专用综合服务网络（PISN）和互联网协议（IP）网络的互操作性，以期确定互操作的可能场景以及特定场景下必须解决的问题。 进一步开展该领域未来可能的标准化活动。 特别是，研究了互操作性的以下方面： · PISN 和 IP 网络通过网关的互通； · 通过IP 网络连接PISN 组件。 对于上述每个方面，考虑的方面包括架构、寻址（包括 IP 寻址的使用）、服务、协议、安全性、服务质量和移动性。 这是在 IP 网络语音和多媒体通信领先标准的背景下进行的，包括 ITU-T 建议 H.323、IETF 会话发起协议 (SIP) 和 ITU-T 建议 H.248。 本技术报告可能产生的未来标准化活动可包括与 IP 网络相关的工作项目和与 PISN 相关的工作项目，以及专门与互操作性相关的工作项目。 PISN 中的主要流量是语音，因此本技术报告重点关注语音流量的互操作性注意事项。 然而，许多支持IP网络中语音的标准也适用于多媒体流量（例如语音、视频和数据）。 尽管在许多方面与语音类似，但传真流量的要求略有不同，本技术报告中未明确考虑。 这可能是进一步研究的主题。 [外文原描述]： The purpose of this Technical Report is to investigate the interoperability of Private Integrated Services Networks (PISNs) and Internet Protocol (IP) networks, with a view to identifying possible scenarios for interoperation, problems that will have to be solved if particular scenarios are to be pursued further, and possible future standardization activities in this area. In particular, the following aspects of interoperability are investigated: ▪ the interworking of PISNs and IP networks via a gateway; ▪ the connection of PISN components via IP networks. For each of the above, aspects considered include architecture, addressing (including use of IP addressing), services, protocols, security, quality of service and mobility. This is conducted within the context of leading standards for voice and multimedia communication over IP networks, including ITU-T recommendation H.323, IETF Session Initiation Protocol (SIP) and ITU-T recommendation H.248. Possible future standardization activities resulting from this Technical Report can include work items relating to IP networks and work items relating to PISNs, as well as work items concerned specifically with interoperability. The dominant traffic in PISNs is voice, and therefore this Technical Report focuses on interoperability considerations for voice traffic. However, many of the standards that support voice in an IP network are also applicable to multi-media traffic (e.g., voice, video and data). Although in many respects similar to voice, fax traffic has slightly different requirements and is not explicitly considered in this Technical Report. It could be the subject of further study.