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GR 1244 CORE : ISSUE 4

Current
Current

The latest, up-to-date edition.

CLOCKS FOR THE SYNCHRONIZED NETWORK: COMMON GENERIC CRITERIA
Published date

01-12-2013

Preface
1 Introduction
  1.1 General
  1.2 Reasons for Reissue
  1.3 Requirements Terminology
  1.4 Requirement Labeling Conventions
      1.4.1 Numbering of Requirement and Related Objects
      1.4.2 Requirement, Conditional Requirement, and
            Objective Object Identification
2 General Clock Concepts
  2.1 Application
  2.2 Environment
  2.3 Interfaces
  2.4 Stratum Hierarchy
  2.5 Synchronization Reference Transport
  2.6 Performance Measurement Parameters and Units
      2.6.1 Slips
      2.6.2 Unit Interval (UI)
      2.6.3 Jitter
      2.6.4 Wander
      2.6.5 Time Delay, Phase-Time or Phase
      2.6.6 Frequency Accuracy
      2.6.7 Frequency Stability
  2.7 Test Measurement Parameters
      2.7.1 Time Interval Error (TIE)
      2.7.2 Maximum Time Interval Error (MTIE)
      2.7.3 Time Deviation (TDEV)
      2.7.4 Time Variance (TVAR)
      2.7.5 Test Methodology
3 General Functional Requirements
  3.1 Clock Stratum Level
  3.2 NE Timing Modes
      3.2.1 External-Timing
      3.2.2 Physical Interface to Synchronization Network
      3.2.3 Line-Timing
      3.2.4 Loop-Timing
      3.2.5 Through-Timing
  3.3 Duplication of Equipment
  3.4 Timing Reference Switching
      3.4.1 Timing Reference Failure Conditions
      3.4.2 Performance During Reference Switching
      3.4.3 Revertive and Nonrevertive Switching
  3.5 Synchronization Pull-In/Hold-In Range
  3.6 Switching Between Clock Modes
  3.7 Transition From Holdover to Normal Mode
4 Input Tolerance Requirements
  4.1 Signal Interruptions
  4.2 Jitter Tolerance
  4.3 Wander Tolerance
  4.4 Phase Transient Tolerance
5 Output Signal Requirements
  5.1 Free Run Frequency Accuracy
  5.2 Holdover Frequency Stability
  5.3 Wander Generation
  5.4 Wander Transfer
  5.5 Jitter Generation and Transfer
  5.6 Phase Transients
  5.7 Phase Build-Out
6 Additional Synchronization Requirements Related
  To DSO Interconnections
  6.1 Phase Alignment Requirements
  6.2 Composite Clock (CC) Redundancy Requirements
  6.3 CC Robustness Requirements
      6.3.1 CC Phase Hits
      6.3.2 CC LOS
7 Requirements For Primary Reference Sources
8 Alarms, Reports & Control Commands
  8.1 Alarms
      8.1.1 Minor Alarms
      8.1.2 Major Alarms
      8.1.3 Critical Alarms
      8.1.4 Alarm Escalation
  8.2 Non-Alarmed Conditions
  8.3 Data Retention
  8.4 Controls
  8.5 Status Indicators
      8.5.1 In Service Indicators
      8.5.2 Alarm Status Indicators
9 Other Generic Criteria
  9.1 Physical and Environmental Criteria
      9.1.1 Central Office and CEV Equipment
      9.1.2 Outside Plant Environment
  9.2 Documentation and Training
Appendix A - Requirement-Object List
References
Acronyms
Requirement - Object Index

Specifies criteria that apply to the various clocks deployed in telecommunications equipment such as transport Network Elements (NEs), Digital Switches, and Timing Signal Generators (TSGs).

DevelopmentNote
Supersedes TR NWT 001244. (05/1999) Included in FR SONET 01. (08/2010) Included in FR TS 01. (02/2012)
DocumentType
Standard
PublisherName
Telcordia Technologies
Status
Current
Supersedes

SCTE 137-1 : 2017 MODULAR HEADEND ARCHITECTURE - PART 1: DOCSIS TIMING INTERFACE
GR 496 CORE : ISSUE 2 SONET ADD-DROP MULTIPLEXER (SONET ADM) GENERIC CRITERIA
GR 253 ILR : ISSUE 2B SYNCHRONOUS OPTICAL NETWORK (SONET) TRANSPORT SYSTEMS: COMMON GENERIC CRITERIA
GR 378 CORE : ISSUE 4 GENERIC REQUIREMENTS FOR TIMING SIGNAL GENERATORS
GR 2878 CORE : ISSUE 4 GENERIC REQUIREMENTS FOR CCS NODES SUPPORTING ATM HIGH-SPEED SIGNALING LINKS (HSLS)
GR 1110 CORE : ISSUE 4 BROADBAND SWITCHING SYSTEM (BSS) GENERIC REQUIREMENTS
GR 1244 ILR : ISSUE 1A CLOCKS FOR THE SYNCHRONIZED NETWORK: COMMON GENERIC CRITERIA
GR 253 CORE : ISSUE 5 SYNCHRONOUS OPTICAL NETWORK (SONET) TRANSPORT SYSTEMS: COMMON GENERIC CRITERIA
GR 82 CORE : ISSUE 15 SIGNALING TRANSFER POINT (STP) GENERIC REQUIREMENTS
GR 474 CORE : ISSUE 2 NETWORK MAINTENANCE: ALARM AND CONTROL FOR NETWORK ELEMENTS
GR 499 CORE : ISSUE 4 TRANSPORT SYSTEMS GENERIC REQUIREMENTS (TSGR): COMMON REQUIREMENTS
GR 436 CORE : ISSUE 2 DIGITAL NETWORK SYNCHRONIZATION PLAN
GR 1377 CORE : ISSUE 5 SONET OC-192 TRANSPORT SYSTEM GENERIC CRITERIA

GR 82 CORE : ISSUE 15 SIGNALING TRANSFER POINT (STP) GENERIC REQUIREMENTS
GR 378 CORE : ISSUE 4 GENERIC REQUIREMENTS FOR TIMING SIGNAL GENERATORS
GR 487 CORE : ISSUE 5 GENERIC REQUIREMENTS FOR ELECTRONIC EQUIPMENT CABINETS
GR 454 CORE : ISSUE 1 GENERIC REQUIREMENTS FOR SUPPLIER-PROVIDED DOCUMENTATION
TR NWT 000170 : ISSUE 2 DIGITAL CROSS-CONNECT SYSTEM (DSC 1/0) GENERIC CRITERIA
GR 839 CORE : ISSUE 1 GENERIC REQUIREMENTS FOR SUPPLIER-PROVIDED TRAINING
GR 436 CORE : ISSUE 2 DIGITAL NETWORK SYNCHRONIZATION PLAN
GR 253 CORE : ISSUE 5 SYNCHRONOUS OPTICAL NETWORK (SONET) TRANSPORT SYSTEMS: COMMON GENERIC CRITERIA
GR 499 CORE : ISSUE 4 TRANSPORT SYSTEMS GENERIC REQUIREMENTS (TSGR): COMMON REQUIREMENTS
GR 496 CORE : ISSUE 2 SONET ADD-DROP MULTIPLEXER (SONET ADM) GENERIC CRITERIA
GR 57 CORE : ISSUE 1 FUNCTIONAL CRITERIA FOR DIGITAL LOOP CARRIER (DLC) SYSTEMS
GR 2830 CORE : ISSUE 2 PRIMARY REFERENCE SOURCES: GENERIC CRITERIA
GR 820 CORE : ISSUE 3 GENERIC DIGITAL TRANSMISSION SURVEILLANCE
GR 474 CORE : ISSUE 2 NETWORK MAINTENANCE: ALARM AND CONTROL FOR NETWORK ELEMENTS

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