BS ISO 20211:2015是规定航天器机载接口的一系列文件之一 服务（SOI）-为支持应用程序而提供的兼容服务。本文件旨在定义SOI提供的服务和服务接口 设备访问服务（DAS）。其范围是仅指定服务，而不是指定 提供服务的方法，尽管假定使用SOIS子网服务。本文件符合SOIS绿皮书中规定的原则（参考文献[D3]） 并打算与它一起使用。交叉引用:CCSDS A02。1-Y-3ISO/IEC 7498-1:1994CCSDS 850.0-G-1CCSDS 350.0-G-2购买时可用的所有现行修订版均包含在本文件的购买中。

BS ISO 20211:2015 is one of a family of documents specifying the Spacecraft Onboard Interface Services (SOIS)-compliant service to be provided in support of applications.The purpose of this document is to define services and service interfaces provided by the SOIS Device Access Service (DAS). Its scope is to specify the service only and not to specify methods of providing the service, although use of the SOIS subnetwork services is assumed.This document conforms to the principles set out in the SOIS Green Book (reference [D3]) and is intended to be applied together with it.Cross References:CCSDS A02.1-Y-3ISO/IEC 7498-1:1994CCSDS 850.0-G-1CCSDS 350.0-G-2All current amendments available at time of purchase are included with the purchase of this document.