1 Scope
2 References
3 Definitions, abbreviations and symbols
3.1 Definitions
3.2 Abbreviations and acronyms
3.3 Symbols
4 Overvoltage and overcurrent conditions
5 Resistibility requirements
5.1 Basic resistibility requirement
5.2 Enhanced
resistibility requirement
6 Equipment boundary
7 Test conditions
7.1 Interface ports
7.2 Test types
7.3 Test conditions
7.4 Test schematics
8 Protection coordination
8.1 General
8.2 Lightning
8.3 Power induction, earth potential rise and power contact
8.4 Special test protector
8.5 Selection of the agreed primary protector
9 Acceptance criteria
10 Tests
10.1 External symmetric pair port
10.2 External coaxial port
10.3 External d.c. and a.c. dedicated power feeding ports
10.4 External a.c. mains power port
10.5 Internal ports
Annex A – Test schematics
A.1 Introduction
A.2 Equipment
A.3 Test generators
A.4 Waveform generation
A.5 Powering, coupling, decoupling and terminations
A.6 Test schematics for different types of ports
Appendix I – Explanations that illustrate test conditions
I.1 Testing
I.2 Range of lightning and power induction test levels
I.3 Relationship between this Recommendation and
other product or product family Recommendations
Appendix II – Supplementary information for manufacturers and operators
II.1 Introduction
II.2 Primary protection coordination
II.3 MDF voltage at the input of equipment
II.4 Current test on mains ports
II.5 Earth and neutral potential rise
II.6 Special resistibility requirements
II.7 Equipment fire in equipment complying with Recommendation ITU‑T K.21
II.8 Ethernet
Bibliography