Table of Contents

Intellectual Property Rights
Foreword
1 Scope
   1.1 Purpose of the present
   1.2 Relationship with other Documents
2 References
3 Definitions and abbreviations
   3.1 Definitions
   3 2 Abbreviations
4 The importance of and need for Synchronization
5 The need for Synchronization in specific Traffic Networks
   5.1 General
   5.2 PDH Network Needs
   5.3 SDH Network Needs
   5.4 Switching needs
   5.5 GSM needs
6 Elements of a Synchronization Network
   6.1 Introduction
   6.2 PRC (Primary Reference Clock)
   6.3 SSU
   6.4 SETS (SDH Equipment Timing Source), SEC (SDH Equipment
       Clock)
   6.5 Regenerator Timing Generator (RTG)
7 Synchronization Distribution Architecture
   7.1 Introduction
   7.2 Master-Slave Synchronization
   7.3 Intra-node Synchronization
   7.4 Distributed PRC Architecture
   7.5 Mixed PRC Architecture
   7.6 Planning Rules
8 Restoration of Synchronization References
   8.1 Types of Protection Mechanisms
   8.2 Selection based on Priority Tables
   8.3 Restoration based on Synchronization Status Messages
   8.4 Applications of Synchronization Status Messages
9 Maintenance Strategies
10 2 Mbit/s retiming applications
   10.1 Definition
   10.2 Network applications for 2 Mbit/s retiming
11 Managing the Synchronization Network
   11.1 Need for Managing the Sync Network
   11.2 Requirements for a Synchronization Network Management
        System
12 Synchronization Interworking between Operators
   12.1 General
   12.2 Independent Synchronization
   12.3 Exchange of Synchronization Reference Signals
   12.4 Performance Issues
Annex A (informative): Examples of Subnetworks employing SSM
        controlled restoration
      A.1 Introduction
      A.2 Network example n 1
      A.3 Network example n 2
      A.4 Network example n 3
      A.5 Network example n 4
      A.6 Network example n 5
Annex B (informative): Interworking between SASE's and SDH NE's
      B.1 Introduction
      B.2 Network analysis
      B.3 SDH sub-network Examples
Annex C (informative): Examples of Synchronization Network
        Implementation
      C.1 Dedicated Synchronization Network
      C.2 Non-Dedicated Synchronization Network
      C.3 Mixed Synchronization Network
History

Abstract

Contains guidelines for the practical use of the ETS 300 462 series and studies of network wide applications for SSM.

General Product Information

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