1 Scope
This part of IEC 61753 contains the minimum initial performance, test and measurement requirements and severities
which a fibre optic pigtailed 1 310 nm upstream and 1 490 nm downstream wide wavelength
division multiplexing (WWDM) passive optical network (PON) device must satisfy in
order to be categorized as meeting the requirements of category C (controlled environments),
as defined in Annex A of IEC 61753‑1:2007.
Annex B of this standard provides information concerning the function of the 1 310 nm upstream
and 1 490 nm downstream WWDM.