ITU-T K.47-2000 Protection of Telecommunication Lines Using Metallic Conductors Against Direct Lightning Discharges Series K: Protection Against Interference Study Group 5
In this Recommendation, the expression "Administration" is used for conciseness to indicate both a telecommunication administration and a recognized operating agency.
ITU-T K.47-2000 history
2000ITU-T K.47-2000 Protection of Telecommunication Lines Using Metallic Conductors Against Direct Lightning Discharges Series K: Protection Against Interference Study Group 5