IEC 60794-2-40:2008 is part of a family specification covering buffered A4 fibres and cabled A4 fibres for indoor use. See IEC 60794-2-41 and IEC 60794-2-42 for blank detail specifications. This second edition cancels and replaces the first edition published in 2003, of which it constitutes a technical revision. In addition to covering buffered A4 fibres, as did the first edition, this second edition now also covers cabled A4 fibres. This standard is to be used in conjunction with IEC 60794-1-1, IEC 60794-1-2 and IEC 60794-2.