scope:

This Recommendation specifies limits and measurement methods for electromagnetic disturbances from lighting equipment for installation in telecommunication facilities.

The electromagnetic disturbances specified in this Recommendation are continuous conducted and radiated disturbances emitted when lighting equipment is operating, and conducted transient disturbances generated when it is switched on and off. The frequency range of continuous conducted disturbances, from 9 kHz to 30 MHz, and continuous radiated disturbances, in the frequency range 30 MHz to 1 GHz, lie within the scope of this Recommendation.

Additionally, this Recommendation specifies the limit of conducted transient disturbances to prevent malfunctions in telecommunication equipment that transmits signals below 30 MHz, such as the integrated service digital network (ISDN), asymmetric digital subscriber line (ADSL) and very high bit rate digital subscriber line (VDSL).