�1����
Scope������������
�2����
References���
�3����
Definitions���
������� 3.1����
Terms defined elsewhere
������� 3.2����
Terms defined in this Recommendation�����
�4����
Abbreviations and acronyms��
�5����
Reference configuration�����������
�6����
General requirements
������� 6.1����
Impulse withstand voltage levels��
������� 6.2����
Surge protective devices (SPDs)����
������� 6.3����
Earthing and bonding�����
�7����
Indirect lightning performance of a telecommunication line������������
������� 7.1����
Number of damages and risk assessment���
������� 7.2����
Tolerable risk����
�8����
Node exposure to lightning-induced surges�����������
������� 8.1����
Unshielded nodes�������������
������� 8.2����
Shielded nodes�
������� 8.3����
Effect of surge protective devices
Annex A � Environmental factor and installation factor����
Annex B � Refraction factor����
Annex C � Shielding factor����
Appendix I � Shield resistance of cables with metallic symmetric
conductors����
Appendix II � Algorithm for computer code����
Appendix III � Collection area for flashes near a telecommunication
line����
Appendix IV � Examples of calculation����
������ IV.1����
Italian survey��
������ IV.2����
Japanese survey�������������
������ IV.3����
German survey���������������
������ IV.4����
American survey������������
������ IV.5����
Final remarks��
Bibliography����