IEC 60793-2-50-2018 pdf free download.Optical fibres – Part 2-50: Product specifications – Sectional specification for class B single- mode fibres.
This part of IEC 60793 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 lEG 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 lEG 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 subcategories 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.
Table 1 shows a map from the IEC designations to the ITU-T recommendations. The table also provides the normative annex in this document that contains the detailed specification as well as the name used to describe this fibre type in lEG 60793-2-50:2015. The ITU-T recommendations as well as the lEG categories/sub-categories within each recommendation are given. In some cases, as for Recommendation G.652, a given IEC designation maps to multiple categories in the ITU-T because the ITU-T categories are distinguished by cabled fibre attribute (PMD0) performance which are not distinguished in the IEC fibre specifications.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 60793-1 (all parts), Optical fibres
IEC 60793-1-20, Optical fibres — Part 1-20: Measurement methods and test procedures — Fibre geometry
lEG 60793-1-21, Optical fibres — Part 1-21: Measurement methods and test procedures — Coating geometry
lEG 60793-1-22, Optical fibres — Part 1-22: Measurement methods and test procedures — Length measurement
lEG 60793-1-30, Optical fibres — Part 1-30: Measurement methods and test procedures — Fibre proof test.IEC 60793-2-50 pdf free download.