CONTENTS

 1     Scope
 2     References
 3     Terms and definitions
 4     Abbreviations
 5     Functional architecture of transport networks
        5.1     Introduction
        5.2     Architectural components
                  5.2.1     Topological components
                  5.2.2     Transport entities
                  5.2.3     Transport processing functions
                  5.2.4     Reference points
        5.3     Partitioning and layering
                  5.3.1     Introduction
                  5.3.2     Partitioning concept
                  5.3.3     Layering concept
        5.4     Connection supervision
                  5.4.1     Connection monitoring techniques
                  5.4.2     Connection monitoring applications
        5.5     Layer network interworking
 6     Application of concepts to network topologies and structures
        6.1     PDH supported on SDH layer networks
        6.2     ATM supported on SDH layer networks
        6.3     ATM supported through ATM inverse multiplexing
 7     Transport network availability enhancement techniques
        7.1     Introduction
        7.2     Protection
                  7.2.1     Trail protection
                  7.2.2     Subnetwork connection protection
Appendix I-Formal description of the architecture
        I.1     Introduction
        I.2     General definitions
        I.3     Reference points
        I.4     Others
        I.5     Topological components
        I.6     Transport entities
        I.7     Transport processing functions
        I.8     Bibliography
Annex I.A-A short introduction to Z
                  I.A.1     Introduction
                  I.A.2     Example #1
                  I.A.3     Example #2