Applies to fibre optic connector sets and contains the minimum test and measurement requirements and severities which a fibre optic connector set shall satisfy in order to be qualified as meeting the requirements for reliability qualification of singlemode fibre optic connectors with single fibre cylindrical ferrule PC polished as defined in the IEC 61754 series and used in controlled and uncontrolled environments (categories C and U) as defined in IEC 61753-1.