IEC 60794-2-40:2008是涵盖室内用缓冲A4光纤和电缆A4光纤的系列规范的一部分。空白详细规范见IEC 60794-2-41和IEC 60794-2-42。第二版取消并取代2003年出版的第一版，第一版为技术修订版。除了像第一版一样覆盖缓冲A4光纤外，第二版现在还覆盖有线A4光纤。本标准将与IEC 60794-1-1、IEC 60794-1-2和 IEC 60794-2。

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.