Table of Contents - K Suppl. 25 (11/2025) - ITU-T K.117 – Supplement on long reach single twisted-pair Ethernet resistibility testing

1	Scope
2	References
3	Definitions
	3.1	Terms defined elsewhere
	3.2	Terms defined in this Supplement
4	Abbreviations and acronyms
5	Conventions
6	SPE configuration
7	10 Mbit/s, 1 km SPE overvoltage and overcurrent threats
	7.1	General
	7.2	Link transmission lines
	7.3	Earth potential rise surges
	7.4	1 km SPE threat levels
8	SPE component resistibility
	8.1	General
	8.2	Link cable
	8.3	Connectors
	8.4	Magnetics
	8.5	Ethernet PHY transceiver integrated circuit (IC)
	8.6	Power source and conversion ICs
	8.7	SPD protective functions
9	Ethernet SPE SPD testing
	9.1	General
	9.2	Surge tests
	9.3	DC tests
	9.4	Identification and marking
10	Summary