�1����
Scope������������
�2����
References���
�3����
Terms and definitions���������������
������� 3.1����
Terms defined elsewhere
������� 3.2����
Terms defined in this Recommendation�����
�4����
Abbreviations and acronyms��
�5����
General considerations��������������
������� 5.1��
��Safety considerations for avoiding damage to the human eye and skin��������������
������� 5.2����
Considerations to keep fibres damage-free
�6����
Procedures and guidelines��������
������� 6.1����
General��������������
������� 6.2����
APR procedures for systems employing discrete optical amplification
������� 6.3����
APR procedures for systems based upon distributed Raman amplification��������
Appendix I � Examples of automatic power reduction (APR) architectures
for systems (including those based upon Raman amplification)� deploying an
optical auxiliary channel (OAC)����
������� I.1����
Considerations on using an OAC instead of a restart pulse for automatic
restart���������������
������� I.2����
Description of APR procedure using co-propagating OSC�������
������� I.3����
Description of APR procedure using counter-propagating OSC��������������
Appendix II � Description of automatic laser shutdown/automatic power
shut-down (ALS/APSD) procedures for single-channel point-to-point SDH
systems����
������ II.1����
Introduction������
������ II.2����
Single-channel point-to-point SDH without line amplifiers�����
������ II.3����
Single-channel point-to-point SDH with line amplifiers�����������
Bibliography����