IEC 60794-1-209:2024定义了用于建立以下环境性能统一要求的测试程序: -与采用类似技术的电信设备和装置一起使用的光纤电缆；和 -具有光纤和电导体的组合的电缆。 贯穿本文件，措辞“光缆”还可以包括光纤单元、微导管光纤单元等。本文件定义了通过高温暴露和温度循环确定电缆老化性能的测试标准，以模拟电缆衰减的寿命行为或物理属性。参见IEC 60794？1？2用于所有类型测试方法的参考指南以及一般要求和定义。 本文件部分取消并取代IEC 60794？1？22:2017.本版构成技术修订。本版本包括以下与IEC 60794相关的重大技术变化？1？22:2017: a）环境温度试验条件已按照IEC 60794？1？2; b)单模和多模光纤的所有最大允许衰减增加值已被删除，并已包括在待指定的细节列表中。

IEC 60794-1-209:2024 defines test procedures to be used in establishing uniform requirements for the environmental performance of:
- optical fibre cables for use with telecommunication equipment and devices employing similar techniques; and
- cables having a combination of both optical fibres and electrical conductors.
Throughout this document, the wording "optical cable" can also include optical fibre units, microduct fibre units, etc. This document defines a test standard to determine cable aging performance by high temperature exposure and temperature cycling in order to simulate lifetime behaviour of the attenuation of cables, or physical attributes. See IEC 60794？1？2 for a reference guide to test methods of all types and for general requirements and definitions.
This document partially cancels and replaces IEC 60794？1？22:2017. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to IEC 60794？1？22:2017:
a) the ambient temperature test condition has been defined as per IEC 60794？1？2;
b) all the maximum allowable attenuation increase values for single-mode and multimode fibres have been deleted, and have been included in the list of details to be specified.