�1���
�Scope�
�2��� �References�
�3��� �Definitions��
�4��� �Reference configurations��
�5��� �General requirements�������
������ �5.1��� �Insulation withstand
voltage levels���
������ �5.2��� �Selection of SPD���
�6��� �Characterization of the
environment����������
������ �6.1��� �Environmental factor (Ce)
and exposure factor (Kx)�
������ �6.2��� �Installation factor (Ki)��������
������ �6.3��� �Shielding factor
(η)
������ �6.4��� �Conventional length
�7��� �Bonding procedures���������
������ �7.1��� �Exchange (node E)
������ �7.2��� �Outside plant (nodes
R, P, C and D)����������
������ �7.3��� �Subscriber premises
(nodes S)�������
�8��� �Surge protective devices (SPDs)��
������ �8.1��� �Installation of surge
protective devices (SPDs)��������
������ �8.2��� �Assessment of the
node's protection need���
������ �8.3��� �Determination of the
protection schemes�����
Annex A � Requirements for SPDs installed between conductors
and cable shield��� �
������ �A.1��� �General��
������ �A.2��� �Length of cable
protected by SPDs�����������
������ �A.3��� �Resistance value of
the cable shield connection to earth along the telecommunication line��� �
Appendix I � Frequency of damage (FZ) due to
lightning flashes near a telecommunication line��� �
Appendix II � Shield resistance for cables with metallic
symmetric conductors��� �
Appendix III � Risk assessment related to a structure: Information related� to the
telecommunication line��� �
Appendix IV � Examples of application��� �
����� �IV.1��� �Telecommunication line
with shielded and unshielded sections in suburban environment��� �
����� �IV.2��� �Telecommunication line
with only shielded sections in suburban environment�����������
����� �IV.3��� �Telecommunication line
with shielded and unshielded sections in rural environment��
Bibliography��� �