Summary - K.158 (07/2025) - Practical guidance for protection of the indoor distribution system for mobile communications in large-scale physical buildings

Recommendation ITU-T K.158 gives a practical guidance on the earthing and bonding for the main configuration type of indoor distribution system in large-scale physical buildings to minimize the risk of damage to equipment and possible injury considering of lightning protection and safety.
The indoor distribution system for mobile communication is used to improve the performance of mobile communication signal coverage in large-scale physical buildings. The installation requirement of earthing and bonding for this system still lack clear guidance in the existing Recommendations, i.e., Recommendations ITU-T K.56, ITU-T K.97, ITU-T K.112 and ITU-T K.120.