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This part of IEC 61753 contains the minimum initial test and measurement requirements and severities which a fibre-optic pigtailed coarse wavelength division multiplexing (CWDM) satisfies in order to be categorized as meeting the requirements of category OP (outdoor protected environment), as defined in Annex A of IEC 61753-1:2018. CWDM is defined in IEC 62074-1.
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