This part of IEC 61280-4 is applicable to the measurement of attenuation and optical return loss of installed optical fibre cable plant using single-mode fibre. This cable plant can include single mode optical fibres, connectors, adapters, splices, and other passive devices. The cabling can be installed in a variety of environments including residential, commercial, industrial and data centre premises, as well as outside plant environments.
This standard is applicable to all single-mode fibre types including those designated by IEC 60793-2-50 as Class B fibres.
The principles of this standard can be applied to cable plants containing branching devices (splitters) and at specific wavelength ranges in situations where passive wavelength selective components are deployed, such as WDM, CWDM and DWDM devices.
This standard is not intended to apply to cable plants that include active devices such as fibre amplifiers or dynamic channel equalizers.