EN 60793-2-20:2016

FOREWORD
1 Scope
2 Normative references
3 Specifications
Annex A (normative) - Specifications for sub-category
        A2a multimode fibres
Annex B (normative) - Specifications for sub-category
        A2b multimode fibres
Annex C (normative) - Specifications for sub-category
        A2c multimode fibres
Bibliography
Annex ZA (normative) - Normative references to
         international publications with their
         corresponding European publications

IEC 60793-2-20:2015(E) is applicable to sub-categories A2a, A2b, and A2c. These fibres are used or can be incorporated in information transmission equipment and optical fibre cables (typically up to 2 km). Three types of requirements apply to these fibres:- general requirements as defined in IEC 60793-2;- specific requirements common to the category A2 multimodal fibres covered in this standard and which are given in Clause 3;- particular requirements applicable to individual sub-categories or specific applications, which are defined in the normative family specification annexes. This third edition cancels and replaces the second edition, published in 2007. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:- Na_th has been replaced by NA_ff;- specified test specimen length and measurement details for core diameter and NA_ff measurements.Keywords: information transmission equipment, optical fibre cables, category A2 multimodal fibres