This part of IEC 60793 contains the general specifications for both multimode and single-mode optical fibres.
Sectional specifications for each of the four categories multimode fibres: A1 , A2, A3, and A4 (part of the multimode fibre class A) contain requirements specific to each category.
Sectional specifications for each of the two single-mode fibre classes, B and C, contain requirements common to each class.
