Applicable to optical fibre types B1.1, B1.2, B1.3, and categories B2 and B4. 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 standard and which are given in Clause 3; Particular requirements applicable to individual fibre types or specific applications, which are defined in the family specifications of Annexes A to E.
Applies to optical fibre types B1.1, B1.2, B1.3, and categories B2, and B4. It covers requirements common to class B single-mode fibres. It also covers particular requirements for individual fibre types and specific applications.
IEC 60793-2-50:2008 is applicable to optical fibre types B1.1, B1.2, B1.3, and categories B2, B4, B5 and B6. A map illustrating the connection of IEC designations to ITU-T designations is shown in Annex I. These fibres are used or can be incorporated in information transmission equipment and optical fibre cables. The main technical changes of this edition include: - aligns the requirements with the relevant ITU-T Recommendations, including tightening the tolerances of many parameters; - adds a new category, B5, which corresponds to the fibres defined in ITU-T Recommendation G.656; and - adds a new category, B6, which corresponds to the fibres defined in ITU-T Recommendation G.657.
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