Rec. ITU-T M.2120 (10/1992) � DIGITAL PATH, SECTION AND TRANSMISSION SYSTEM1) FAULT DETECTION AND LOCALIZATION PROCEDURES
FOREWORD
1 General
2 Maintenance techniques with ISM
    2.1 Relationship with Recommendation M.20 [6]
    2.2 Fault localization information
    2.3 Performance filtering, thresholding, reporting and historical storage
3 Fault localization procedures on digital transmission system
    3.1 Fault localization in a pre-ISM environment
    3.2 Fault localization in an ISM environment
4 Fault localization procedures on digital paths
    4.1 Fault localization in a pre-ISM environment
    4.2 Fault localization in an ISM environment
5 Fault localization procedures on digital sections
6 Returning an ME into service
7 Trend analysis and signatures
References