标准摘要
[中文适用范围]： 根据互通单元 (IWU) 从一个接口接收的协议数据单元 (PDU) 与随后在 IWU 任一接口上传输的 PDU 之间的映射来描述互通单元 (IWU) 的功能。 还描述了 IWU 可以在每个接口上独立启动的过程。 每个接口对应一个 DTE/DXE 连接实例，并且互通单元的两个接口都按照 ISO 8208 的规定作为 DTE 运行。 参考文献：ISO 8208； 8880-2； 8881。 [外文原描述]： Describes the function of the Interworking unit (IWU) in terms of the mapping between Protokol Data Units (PDUs) that it receives from one interface, and PDUs that it then transmits which could be on either interface of the IWU. Also describes procedures an IWU can initiate on each interface independently. Each interface corresponds to one instance of a DTE/DXE connection, and both interfaces of the Interworking Unit operate as a DTE as specified by ISO 8208. References: ISO 8208; 8880-2; 8881.
英文名称Information technology - Telecommunications and information exchange between systems - Operation of an X.25 interworking unit