Table of Contents

Intellectual Property Rights
Foreword
1 Scope
2 References
3 Definitions, abbreviations and symbols
  3.1 Definitions
  3.2 Abbreviations
  3.3 Symbols and diagrammatic conventions
  3.4 Introduction
4 Synchronization principles
  4.1 Network synchronization
  4.2 Synchronization distribution trails
  4.3 Synchronization interface
  4.4 Clock-Source Quality-Level
  4.5 SSM and TM channels
  4.6 Selection process
  4.7 Signal fail
  4.8 Hold-off time
  4.9 WTR time
  4.10 Synchronization source priorities
  4.11 External commands (EXTCMD)
  4.12 Automatic reference selection process
  4.13 Timing loop prevention
  4.14 Delay times for NEs with SEC
  4.15 Delay times for NEs with SSU or for SASE
  4.16 Synchronization layer functions
  4.17 Overview of the processes performed within
       the atomic functions
5 Synchronization distribution layer atomic functions
  5.1 SD Connection function (SD_C)
  5.2 SD Trail Termination (TT) functions
  5.3 SD adaptation functions
6 NS layer atomic functions
  6.1 NS_connection functions (NS_C)
7 TL to SD layer atomic function
  7.1 STM-1 multiplex section adaptation functions
  7.2 STM-4 multiplex section adaptation functions
  7.3 STM-16 multiplex section adaptation functions
  7.4 P31s adaptation functions
  7.5 P4s adaptation functions
  7.6 P12s layer adaptation functions
  7.7 T12 layer adaptation functions
8 Equipment clock to TLs clock adaptation functions
  8.1 STM-N layer
  8.2 VC layers
  8.3 Pxx layers
  8.4 T12 layer
Annex A (normative): Synchronization selection process
Annex B (informative): TL models for synchronization
         information
Annex C (informative): Examples of synchronization
         functionality in the NE
Annex D (informative): Delay time allocation
  D.1 Delay and processing times for the synchronization
       selection process
  D.2 Non switching message delay T NSM
  D.3 Switching message delay T SM
  D.4 Holdover message delay T HM
  D.5 Wait to restore time T WTR
Annex E (informative): Overview of inputs/outputs to
         the atomic functions
Bibliography
History

Abstract

Functional requirements for synchronisation layers in equipment based on the generic principles described in part 1-1.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	European Telecommunications Standards Institute
Pages
ISBN
Committee	TM 1