GB/T 21564.4-2008 in English

《GB/T 21564.4-2008报警传输系统串行数据接口的信息格式和协议 第4部分：公用传输层协议》由TC100（全国安全防范报警系统标准化技术委员会）归口，主管部门为公安部。
ＧＢ／Ｔ２１５６４《报警传输系统串行数据接口的信息格式和协议》分为五个部分，本部分为ＧＢ／Ｔ２１５６４的第４部分。本部分规定了报警传输系统标准接口所应采用的传输层信息结构、格式和传输过程。本部分适用于报警信息的传输和发往/来自入侵、火警、出入口控制和社会报警系统的其他信息的传输，以及发往/来自其他类似系统的信息的传输。本部分修改采用了国际电工委员会ＩＥＣ６０８３９-７-４：２００１（英文版）。

Scope

This part of GB/T 21564 specifies the information structure, format and transmission process of the transport layer adopted by the standard interface of the alarm transmission system. This section should be used at the interface when equipment from one supplier wants to communicate with equipment from another supplier and the underlying system architecture does not provide the necessary functionality to support a common application layer. This part complies with the OSI layered protocol structure, allowing flexible selection and use of low-level transmission media and protocols, while maintaining support for common application layer protocols. This section applies to the transmission of alarm information and other information to/from intrusion, fire alarm, population control and social alarm systems, and the transmission of information to/from other similar systems. This standard does not contain requirements for the physical management of authenticators.