Rec. ITU-T M.1375 (03/1993) – MAINTENANCE OF INTERNATIONAL DATA TRANSMISSION SYSTEMS
FOREWORD
CONTENTS
ABSTRACT
KEYWORDS
1 General
    1.1 Introduction
    1.2 Terminology
    1.3 Performance limits and objectives
    1.4 Maintenance records
2 Fault reporting procedures
    2.1 Control and sub-control status
    2.2 Fault information exchange
3 Fault localization
4 Maintenance tests
    4.1 General
    4.2 Maintenance intervention tests
    4.3 Returning to service tests
    4.4 Loopback tests
5 In-service monitoring
References