1
Scope
2 References
3 Definitions
4 reference configurations
5 General requirements
5.1 Resistibility levels
5.2 Selection of SPD
6 Characterization of the
environment
6.1 Environmental factor (Ke) and
exposure factor (Kx)
6.2 Installation factor (Ki)
6.3 Shielding factor (Ks)
6.3.1 Shielding factor related to the shield (Kss)
6.3.2 Shielding factor related to earth (Kse)
6.4 Conventional length
7 Bonding procedures
7.1 Exchange (Node E)
7.2 Outside plant (Nodes M, P, C and
D)
7.3 Subscriber premises (Nodes S and
I)
8
Surge protective devices (SPD)
8.1 Installation of surge protective devices
(SPD)
8.2 Assessment of the node's
protection need
8.3 Determination of the protection
schemes
Annex A – Shielding
factor related to earth (Kse)
Appendix I –
Environmental factor (Ke)
Appendix II – Shield
resistance for cables with metallic symmetric conductors
Appendix III –
Examples of Application
III.1 Telecommunication line with
shielded and unshielded sections in suburban environment
III.2 Telecommunication line with only
shielded sections in suburban environment
III.3 Telecommunication line with
shielded and unshielded sections in rural environment