Rec. ITU-T G.803 (03/1993) � ARCHITECTURES OF TRANSPORT NETWORKS BASED ON THE SYNCHRONOUS DIGITAL HIERARCHY (SDH)
FOREWORD
CONTENTS
1 Introduction
    1.1 Scope
    1.2 Abbreviations
    1.3 Structure of Recommendation
2 Vocabulary for SDH network architecture
    2.1 Generic terms
    2.2 Terms specific to SDH
    2.3 Terms associated with protection
3 Transport functional architecture of SDH-based networks
    3.1 Introduction
    3.2 Architectural components
    3.3 Partitioning and layering
    3.4 Tandem connection monitoring [connection supervision]
4 Application of concepts to network topologies and structures
    4.1 PDH layers supported on SDH layers
    4.2 ATM cell layers supported on SDH layers
5 Transport network availability enhancement techniques
    5.1 Introduction
    5.2 Restoration
    5.3 Protection
    5.4 SDH trail protection examples
    5.5 SDH sub-network connection protection examples
6 Architecture of synchronization networks
    6.1 Introduction
    6.2 Synchronization network aspects
    6.3 Payload jitter and wander
    6.4 PDH/SDH interworking implications
7 Choice of primary rate mapping
    7.1 Features of the primary rate mappings
    7.2 Selection of mapping options
Annex A � Introduction of SDH-based transport networks