IEC 60793-2-50:2018 RLV包含官方IEC国际标准及其红线版本。Redline版本不是官方文档，它只有英文版本，为您提供了一种快速简单的方法来比较IEC官方标准与其以前版本之间的所有变化。 IEC 60793-2-50:2018适用于B-652、B-653、B-654、B-655、B 656和B-657类别的光纤。表1中示出了IEC名称与ITU-T名称的连接图。这些光纤用于或可以结合在信息传输设备和光缆中。？三种类型的要求适用于这些纤维: ？IEC 60793-2中定义的一般要求； ？本文件涵盖的B类单模光纤共有的具体要求，在第5条中给出；？适用于附件A至F中定义的单个纤维类别或特定应用的特殊要求。 对于某些光纤类别（在相关系列规格中显示），存在基于传输属性规格差异来区分的子类别。这些子类别的名称记录在单个系列质量标准中。 第六版取消并取代2015年出版的第五版。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: a)引入与ITU T建议G.652、G.653、G.654、G.655、G.656和G.657更匹配的修订命名约定。本文档范围内概述了这些更改以及新名称的交叉引用表。根据新的命名，对附件进行了重新排列，以提高清晰度； b)关于200微米涂层单模光纤要求的进一步细节； c)与2016年11月发布的以下ITU-T建议协调:G.652、G.654、G.657，包括修订的色散规范、这些光纤类别的新类别和新应用空间； d)在附件A至F的标题中增加了纤维类型的描述。 关键词:信息传输设备,光纤光缆

IEC 60793-2-50:2018 RLV contains both the official IEC International Standard and its Redline version. The Redline version is not an official document, it is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition.

IEC 60793-2-50: 2018 is applicable to optical fibre categories B-652, B-653, B-654, B-655, B 656 and B-657. A map illustrating the connection of IEC designations to ITU-T designations is shown in Table 1. These fibres are used or can be incorporated in information transmission equipment and optical fibre cables.？ Three types of requirements apply to these fibres:
？ general requirements, as defined in IEC 60793-2;
？ specific requirements common to the class B single-mode fibres covered in this document and which are given in Clause 5;
？ particular requirements applicable to individual fibre categories or specific applications, which are defined in Annexes A to F.
For some fibre categories (shown in the relevant family specifications), there are sub-categories that are distinguished on the basis of difference in transmission attribute specifications. The designations for these sub-categories are documented in the individual family specifications.
The sixth edition cancels and replaces the fifth edition published in 2015. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) Introduction of a revised naming convention which better matches with those found in ITU T Recommendations G.652, G.653, G.654, G.655, G.656, and G.657. These changes are outlined in the scope of this document along with a cross reference table for the new names. Annexes have been rearranged to improve clarity based on the new naming;
b) Further details on the requirements for 200 micron coated single-mode fibre;
c) Harmonization with the following ITU-T Recommendations published in November 2016: G.652, G.654, G.657 including revised chromatic dispersion specifications, new categories and new application spaces for these fibre categories;
d) Descriptions of fibre types have been added to the titles of Annexes A to F.
Keywords: information transmission equipment, optical fibre cables