ETR 114 : 20001

Foreword
1 Scope
2 References
3 Abbreviations
4 Structure of this ETR
5 Vocabulary for SDH network architecture
6 Transport functional architecture of SDH-based networks
   6.1 General
   6.2 SDH transport network layers
7 Application of concepts to network topologies and structures
8 Transport network availability enhancement techniques
   8.1 SDH trail protection examples
   8.2 SDH sub-network connection protection examples
9 Choice of primary rate mapping
   9.1 Features of the primary rate mappings
   9.2 Selection of mapping options
10 Introduction of SDH-based transport networks
   10.1 General
   10.2 Types of circuit layer signals
   10.3 Initial introduction of SDH-based equipment
   10.4 Interworking between PDH- and SDH-based transport
        networks
   10.5 Introduction STM-N interfaces on 64 kbit/s switches
        (and DXCs)
History

Equivalent to parts G.sna1 and G.sna2. Identifies main applications, describes network architecture, topologies, structures, synchronisation, evolution and access point identification and performance capabilities.