1 Scope
This part of IEC 61753 contains the minimum initial performance, test and measurement requirements and severities
which a fibre optic pigtailed 980/1 550 nm wide wavelength division multiplexing (WWDM)
device will satisfy in order to be categorized 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. The requirements cover devices with single-mode non-connectorised pigtails.
This device has three ports; 980 nm port, 1 550 nm port and common port for output
or combining 980 nm and 1 550 nm.

