This part of IEC60793 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 2km). Three types of requirements apply to these fibres: general requirements as defined in IEC60793‑2 ; specific requirements common to the category A2 multimodal fibres covered in this standard and which are given in Clause3; particular requirements applicable to individual sub-categories or specific applications, which are defined in the normative family specification annexes.