�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���� Factors influencing surge levels��������
������� 6.1���� Surge coupling and mechanisms of damage�����
������� 6.2���� Elements
of protection�������������
������� 6.3���� Equipment resistibility���������������
������� 6.4���� Correct classification and use of ports�
������� 6.5���� Cable routing�
������� 6.6���� Earthing and bonding�
������� 6.7���� SPDs��
������� 6.8���� Direct strike protection of a structure�
������� 6.9���� Installation of protection����������
������ 6.10���� Conclusions���
Annex A � Simulations����
������� A.1���� Introduction��
���� ���A.2���� Stress applied to the equipment via the mains port�����
������� A.3���� Stress applied to the equipment via the telecommunication port���������
������� A.4���� Waveform after primary protection and coordination
Appendix I � Calculation of cable current in a telecommunication line versus
distance from the strike point����
������� I.1���� Introduction����
������� I.2���� Resistance to earth at the strike
point�
������� I.3���� Equivalent circuit of a strike to earth����
������� I.4���� Simulation results for a 30 pair 0.64
mm MB cable with a zero ohm resistance to earth at the customer end����
������� I.5���� Simulation results for a 30 pair 0.4
mm non-shielded cable���������
������� I.6���� Conclusions drawn from the
simulations������������
������� I.7���� Calculation of cable current������
������� I.8���� Determination of the cable surge
generator.���
Appendix II � Impact of local environment����
Bibliography����