标准摘要
[中文适用范围]： 该国际标准定义了专用综合服务网络（PISN）交换中附加到公共（或第三方提供）网络设备的虚拟专用网络（VPN）功能所需的映射功能。 需要映射功能来提供C或T参考点处接口的物理终止，以及将Q参考点处的用户信道和信令信息流映射到C或T处的适当信道或时隙参照点。 在T参考点，假设D信道上使用的协议是DSS1的增强版本。 这些协议增强功能分别在建议 Q.931 和 Q.932 的附件 Q 和附件 X 中给出。 本国际标准中规定的映射功能适用于连接到支持接入之间的 PISN 信息流和/或 PISN 服务的 VPN 的 PINX。 C 和 Q 参考点在 ISO/IEC 11579-1 中定义。 T 参考点在 ITU-T Rec. 中定义。 1.411。 本国际标准涵盖的C或T参考点的接口类型是ISDN主速率接口和基本接入接口。 [外文原描述]： This International Standard defines the mapping functions in exchanges of private integrated services networks (PISN) required for their attachment to Virtual Private Network (VPN) functionality of public (or third party provided) network equipment. Mapping functions are required to provide for the physical termination of the interface at the C or T reference points, and for the mapping of user channels and signalling information flows at the Q reference point to the appropriate channels or timeslots at the C or T reference point. At the T reference, point it is assumed that the protocol used on the D channel is the enhanced version of DSS1. These protocol enhancements are given in Annex Q and Annex X of Recommendations Q.931 and Q.932 respectively. The mapping function specified in this International Standard are applicable to PINXs connected to a VPN that supports either PISN information flows between accesses and/or PISN services. The C and Q reference points are defined in ISO/IEC 11579-1. The T reference point is defined in ITU-T Rec. I.411. The types of interfaces at the C or T reference point covered by this International Standard are the ISDN primary rate interface and the basic access interface.
英文名称Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Mapping functions for the employment of Virtual Private Network scenarios