IEC 62149-5:20 20作为IEC 62149-5:20 20 RLV提供，其中包含国际标准及其红线版本，显示了与上一版本相比技术内容的所有变化。IEC 62149-5:20 20规定了国际电信联盟(ITU)在ITU-T建议G.983.1中推荐的异步传输模式无源光网络(ATM-PON)系统收发器模块的性能。本第三版取消并取代2009年出版的第二版，构成技术修订。与上一版相比，此版本包括以下重大技术变更: -删除第4条中对类型的描述； -更新了参考文件的标题。

IEC 62149-5:2020 is available as IEC 62149-5:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 62149-5:2020 specifies performance on the transceiver modules for asynchronous-transfer-mode passive optical network (ATM-PON) systems recommended by the International Telecommunication Union (ITU) in ITU-T Recommendation G.983.1. This third edition cancels and replaces the second edition published in 2009 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- description of types in Clause 4 has been removed;
- titles of reference documents have been updated.