ITU-T rec. I.610 (1991) OAM PRINCIPLES OF THE B-ISDN ACCESS
FOREWORD
Preamble to B-ISDN Recommendations
1 Introduction
    1.1 General
    1.2 Scope of application
2 OAM principles
    2.1 Network configuration for maintenance activities
    2.2 Relation with the telecommunication management network (TMN)
3 Basic requirements
    3.1 OAM levels in the network
    3.2 Relationship of OAM functions with the B-ISDN Protocol Reference Model
4 Mechanisms to provide OAM flows
    4.1 Physical Layer mechanisms
        4.1.1 SDH-based transmission systems (Recs. G.707 to G.709)
        4.1.2 Cell-based transmission systems
        4.1.3 PDH based transmission systems (Recs. G.702 and G.703)
    4.2 ATM Layer mechanisms
    4.3 Association of the OAM mechanisms with the transport functions
5 OAM functions of the Physical Layer
    5.1 OAM flows in some physical configurations
    5.2 OAM functions
6 OAM functions of the ATM Layer
    6.1 OAM flows in some physical configurations
    6.2 OAM functions
ANNEX A Alphabetical list of abbreviations used in this Recommendation