IEC 60794-3-12:20 21作为IEC 60794-3-12:20 21 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 60794-3-12:20 21是用于场所布线的管道和直埋光通信电缆的详细规范，以确保与ISO/IEC 11801-1兼容。本文件的要求确保ISO/IEC 11801-1型号适用于通用布线和系统性能。本文档中的值支持这些模型。IEC 60794-3-10系列规范的要求适用于本文件涵盖的电缆。第5条中详述的特定要求定义了相对于IEC 60794-3-10要求的特定选项或定义了附加要求。这第三版取消并取代了2012年出版的第二版。本版构成技术修订版。与上一版相比，此版本包括以下重大技术变更: -增加对ISO/IEC 11801-1的引用； -删除对ISO/IEC 24702的引用； -纳入OM5电缆光纤性能类别； -纳入OS1a电缆光纤性能类别； -电缆光纤性能类别OM1、OM2和OS1不再是规范性的，仅供参考。

IEC 60794-3-12:2021 is available as IEC 60794-3-12:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 60794-3-12:2021 is a detailed specification for duct and directly buried optical telecommunication cables for use in premises cabling to ensure compatibility with ISO/IEC 11801-1. This document's requirements ensure that the ISO/IEC 11801-1 models work for generic cabling and system performances. Values in this document support these models. The requirements of the family specification IEC 60794-3-10 are applicable to cables covered by this document. Particular requirements detailed in Clause 5 either define a specific option relative to the requirements of IEC 60794-3-10 or define additional requirements. This third edition cancels and replaces the second edition published in 2012. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- addition of references to ISO/IEC 11801-1;
- removal of references to ISO/IEC 24702;
- incorporation of the OM5 cabled fibre performance category;
- incorporation of the OS1a cabled fibre performance category;
- cabled fibre performance categories OM1, OM2 and OS1 are no longer normative, and are retained for information.