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||Fibre optic communications
Contains the general requirements for both multimode and single mode optical fibres. Sectional specifications for each of the four multimode categories: A1, A2, A3, and A4 contain requirments specific to each category. The requirements of this standard apply to all categories. Each sectional specification contains the requirements that are common to all family specifications that are within it. Tests or measurement methods are defined for each specific attribute.