IEC 61274-1-1:2011 is part of the generic specification IEC 61274-1, Fibre optic interconnecting devices and passive components - Adaptors for fibre optic connectors - Part 1: Generic specification. It includes: a blank worksheet with instructions for preparing detail specifications. This third edition cancels and replaces the second edition of IEC 61274-1-1 published in 2006 and constitutes a technical revision. Specific technical changes since the second edition include to reconsider quality approval and quality conformance inspection and to add the optical interface standard into the detail specification worksheet.