Table of Contents - L.1206 (07/2025) - Impact on information and communication technology equipment architecture of multiple AC, -48 VDC or up to 400 VDC power inputs

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	Definition and requirements of multiple power interface configuration at the input of ICT equipment
	6.1	Individual power interfaces used for multiple power interface configuration
	6.2	Multiple power interface configurations and requirements
7	Combination dependence of A, A3 and A1 interfaces for multiple power feeds
8	Backfeeding protection
Appendix I – Power input switch selector installation options
	I.1	Switch selector installation and options for system interface connections
	I.2 	Switch selector installed within converter and interface connections
Appendix II – Switch selector – General functionality and requirements switch
	II.1	General description of the power input switch selector
	II.2	Input power monitoring
Appendix III – Backfeeding protection
	III.1	Example of backfeeding protection
	III.2	Battery test function
Appendix IV – Example of upstream conversion for dual -48 V power feed configuration at input of ICT equipment
Bibliography