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 O
(uncontrolled environments), as defined in Annex A of IEC 61753-1.
Annex B of this standard provides information concerning the function of the 1 310 nm
upstream and 1 490 nm downstream WWDM.