This part of IEC 60793-2 is applicable to optical fibres type A2a, A2b, and A2c. These fibres are used or can be incorporated in information transmission equipment and optical fibre cables (typically up to 2 km). Three types of requirements apply to these fibres: - general requirements as defined in IEC 60793-2; - specific requirements common to the category A2 multimodal 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 normative family specification annexes.