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

1	Scope
2	References
3	Definitions
	3.1	Terms defined elsewhere
	3.2	Terms defined in this Recommendation
4	Abbreviations and acronyms
5	Conventions
6	Reference configuration
	6.1	The typical configuration about DAS
	6.2	The typical configuration about DDS
7	General consideration
8	Protection for DAS
	8.1	The protection for host machine
	8.2	The protection for transmission link
	8.3	The protection for antenna
9	Protection for DDS
	9.1	The protection for host machine
	9.2	The protection for transmission link
	9.3	The protection requirements for antenna
Appendix I – The practical engineering information about the indoor distribution system
	I.1	The engineering information about DAS
	I.2	The engineering information about DDS
Appendix II – Examples about the risk assessment and calculation of separation distances for DAS
	II.1	Example of the risk assessment in accordance with [IEC 62305-2]
	II.2	A calculation example about the separation distances
Appendix III – Considerations on protection under some specific situations
	III.1	Considerations about the protection measures for DAS
	III.2	Considerations about the protection measures for DDS
Appendix IV – The referred separation distance for Ethernet cabling from mains power cabling
	?.1	The referred value derived from European standard [b-EN 50174-1]
	?.2	The referred value derived from Chinese standard [b-GB 50311]
Bibliography