Table of Contents - K.21 (07/2026) - Resistibility of telecommunication equipment installed in customer premises to overvoltages and overcurrents

1	Scope
2	References
3	Definitions
	3.1	Terms defined elsewhere
	3.2	Terms defined in this Recommendation
4	Abbreviations and acronyms
	4.1	Symbols
5	Conventions
6	Tests
Annex A – Special resistibility requirements
	A.1	Introduction
	A.2	Special resistibility requirements
Bibliography