CONTENTS

 1     Scope
 2     References
 3     Abbreviations
 4     Criteria for detection and clearance of a Loss of Signal (LOS) defect
 5     Criteria for detection and clearance of an Alarm Indication Signal (AIS) defect condition
 6     Criteria for detection and clearance of a Remote Defect Indication (RDI) defect
Appendix I – Other criteria that have been used for the detection/clearance of LOS, AIS or RDI defects
        I.1     LOS defect detection/clearance criteria
        I.2     AIS defect detection/clearance criteria
        I.3     RDI defect detection/clearance criteria