This Recommendation contains definitions and test methods suitable mainly for factory measurements of the statistical and non-linear attributes of the single-mode optical fibres and cables described in [b-ITU-T G.652]@ [b-ITU-T G.653]@ [b-ITU-T G.654]@ [b-ITU-T G.655]@ [b-ITU-T G.656]@ and [b-ITU-T G.657]. These definitions and test methods are generally not appropriate for multimode fibre@ such as that described in [b-ITU-T G.651.1]. Some of the test methods@ when so indicated@ may also be used to characterize discrete optical components@ such as those described in [b-ITU-T G.671]. [b-ITU-T G.650.1] contains definitions and test methods for linear deterministic attributes. Methods to compensate for impairments caused by polarization mode dispersion (PMD) can be found in [b-ITU-T G.666].