1 Scope
This part of IEC 61753
contains the minimum initial test, measurement requirements and severities which
a fibre optic 1,31/1,55 μm wide wavelength division multiplexing (WWDM) device satisfies
in order to be categorised as meeting the requirements of category C (indoor controlled
environment), as defined in IEC 61753‑1:2018, Annex A. WWDM is defined in IEC 62074‑1.