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 Classification of interfaces
6.1 Type of interface
6.2 Specifying the transient
7 Application of overvoltage categories
Annex A – Classifying external and internal interfaces
Appendix I – Overvoltages on telecommunication network
I.1 General
I.2 Protection and risk assessment
I.3 Telecommunication overvoltage categories
I.4 Causes of overvoltage
Bibliography