�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)�������
������� 6.4���� 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����