Symmetricom SSU-2000, SDU-2000 User Manual

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SSU-2000 Synchronization Supply Unit

and the

SDU-2000 Synchronization Distribution Unit

User Guide

Revision F.01 – January 2007

Part Number 12713020-002-2

Symmetricom, Inc.

2300 Orchard Parkway

San Jose, CA 95131-1017

U.S.A.

http://www.symmetricom.com

All product names, service marks, trademarks, and registered trademarks

used in this document are the property of their respective owners.

Table of Contents

Contents

How to Use This Guide

Purpose of This Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Who Should Read This Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Structure of This Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Conventions Used in This Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Warnings, Cautions, Recommendations, and Notes . . . . . . . . . . . . . . . . . . . . . . . 20

Related Documents and Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Where to Find Answers to Product and Document Questions . . . . . . . . . . . . . . . . 22

What’s New in This Document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Chapter 1 Product Overview

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Typical System Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Timing Signal Generator (TSG) Configuration . . . . . . . . . . . . . . . . . . . . . . . . . 25

Primary Reference Source (PRS) Configuration. . . . . . . . . . . . . . . . . . . . . . . . 26

SSU-2000 Configured as a Monitor-Only System. . . . . . . . . . . . . . . . . . . . . . . 26

System Architecture. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Input Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Output Section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Clock Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Communications Section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Alarms and Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

System Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

SSU-2000 Main Shelf (Chassis) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

SSU-2000 Family of Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Clock and Communications Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Input Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Output Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Configuring Redundant Output Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Input and Output Adapter Panels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Communications Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Software Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Software Versions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Basic System Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Graphical User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Overview of SSU-2000 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Synchronization Status Messages (SSMs). . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Indicators and Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

SDU-2000 Synchronization Distribution Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Expansion Shelf Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Setting the Expansion Shelf Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

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Buffered Clocks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

SDU Module Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Connector Panel Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Controls and Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Chapter 2 Installing the SSU-2000

Unpacking and Inspecting the Shelf. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Preliminary Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Installation Tools and Materials. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Electromagnetic Interference (EMI) Considerations . . . . . . . . . . . . . . . . . . . . . 61

Ventilation Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Rack Mounting the SSU-2000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

SSU-2000 Shelf. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

I/O Adapter Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Making Ground and Power Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Making Ground Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Connecting Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Making Signal Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Making I/O Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Installing Output Summer Adapters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Making Communication Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Making Ethernet Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Local Oscillator Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Remote Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Making Alarm Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Connecting Antennas. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Connecting an SDU-2000 Expansion Shelf. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Connecting a Single SDU-2000 Expansion Shelf . . . . . . . . . . . . . . . . . . . . . . . 77

Connecting Additional SDU-2000 Expansion Shelves . . . . . . . . . . . . . . . . . . . 78

Handling Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Installing a Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Exchanging a Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Disabling a Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Removing Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Installation Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Powering Up the SSU-2000. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

SSU-2000 Main Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

SDU-2000 Expansion Shelf. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Normal System Indications During Turn-Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

After Turn Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

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Chapter 3 Provisioning and Operating the SSU-2000

Controls and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

SSU-2000 Status LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

SSU-2000 Operating Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Establishing a Connection With the SSU-2000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Communicating by Serial Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Communicating by Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Overview of the SSU-2000 Security System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Adding An Administrator-Level User to the System. . . . . . . . . . . . . . . . . . . . . . . . . . 95

Adding Users to the System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Setting Security Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Logging In to the SSU-2000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Logging In with an Expired Password. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Logging Off of the SSU-2000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Initial Provisioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Provisioning General Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Adding or Enabling a Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Disabling a Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Removing a Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Provisioning GPS Input Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Provisioning Other Input Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Provisioning Output Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Saving the Provisioning Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Checking Alarm Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Factory Default (Basic) Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Retrieving Factory Defaults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Changing Factory Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Restoring Factory Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Customizing Other Configuration Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Retrieving the User Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Backing Up and Restoring Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

Backing Up the Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

Using ICS Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

Using TL1 Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

Restoring the Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Using ICS Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Using TL1 Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Chapter 4 Commissioning

Readiness to Test Checklist. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

SSU-2000 Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

Equipment Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

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Commissioning Tests. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Testing the Ethernet Communications Interface. . . . . . . . . . . . . . . . . . . . . . . 122

Testing the EIA-232 Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Testing The MINOR Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Testing the MAJOR Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Testing the CRITICAL Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

Testing the Reference Signals and Selection. . . . . . . . . . . . . . . . . . . . . . . . . 124

Testing the Clock Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Testing the Output Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Testing the System Stability and Accuracy (Optional) . . . . . . . . . . . . . . . . . . 126

Commissioning Test Data Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

Chapter 5 Maintenance and Troubleshooting

Responding to SSU-2000 Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Preventive Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Corrective Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

Establishing a Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

Interpreting Status Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Troubleshooting the SDU-2000. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

Re-ordering Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Equipment Return Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Repacking the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Equipment Return Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Contacting Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Chapter 6 Clock and Communications Module Reference Data

Stratum 2E Clock Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

Status LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Functional Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

Stratum 3E Clock Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Status LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

Performance Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

Type 1 Clock Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

Status LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Functional Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

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Communications Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

Status LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

Communications Module Alarm Logic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

EIA-232 Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

Ethernet Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157

Resetting the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157

Chapter 7 Input Module Reference Data

1-Port and 3-Port E1 Input Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160

Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160

Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161

Status LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167

Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168

1-Port and 3-Port DS1 Input Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170

Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170

Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171

Status LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177

Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178

GPS Input Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

Status LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182

Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183

Composite Clock Input Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184

Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184

Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

Status LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186

Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

Japanese Sine Wave Input Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

Status LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192

Japanese Composite Clock Input Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195

Status LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196

Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197

Input Adapter Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197

Input Adapter Panel for 1-Port Input Module. . . . . . . . . . . . . . . . . . . . . . . . . . 197

Input Adapter Panel for 3-Port Input Modules. . . . . . . . . . . . . . . . . . . . . . . . . 199

Input Wire-Wrap Adapters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200

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Chapter 8 Output Module Reference Data

E1 Output Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204

Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204

Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205

Status LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206

Performance Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207

DS1 Output Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208

Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208

Status LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209

Performance Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210

Composite Clock Output Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212

Status LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213

Performance Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214

Japanese Composite Clock Output Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215

Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215

Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216

Status LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217

Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218

Japanese Sine Wave Output Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219

Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219

Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219

Status LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224

Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225

E1/2048 kHz Output Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225

Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226

Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230

Status LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231

Performance Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232

2048 kHz Output Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233

Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233

Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233

Status LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237

Performance Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238

RS-422 Output Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239

Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239

Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239

Status LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243

Performance Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244

DS1 Line Retiming Unit (LRU). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245

Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247

Status LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249

Installing the Line Re-timing Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257

Provisioning the DS1 Line Re-timing Module . . . . . . . . . . . . . . . . . . . . . . . . . 257

Alarms and Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258

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E1 Line Re-timing Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258

Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258

Status LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260

Installing the E1 Line Re-timing Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261

Installing the Output Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263

Provisioning the E1 Line Re-timing Module . . . . . . . . . . . . . . . . . . . . . . . . . . 263

Alarms and Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264

Buffer Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264

Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264

Output Adapter Panels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266

Balun Output Adapter Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266

DE9 Output Adapter Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266

High-Density Wire-Wrap Output Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267

Adapter Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267

Chapter 9 Hardware Configuration Guide

Configuring a Conventional SSU/TSG System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270

Configuring a Primary Reference Source (PRS) System. . . . . . . . . . . . . . . . . . . . . 270

Configuring a Monitor-Only System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271

Configuring a Subtending SSU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272

Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273

Input Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273

Output Section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275

Setting Subtending Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275

Changing to Subtending SSU Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276

Required Hardware. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277

Installing Software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277

Changing From Subtending SSU Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277

SSU-2000 Configuration Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .289

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10 SSU-2000 User Guide 12713020-002-2 Revision F.01 – January 2007

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Figures

1-1 SSU-2000 Synchronization Supply Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

1-2 SSU-2000 Configured as a TSG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

1-3 SSU-2000 Configured as a Primary Reference Source. . . . . . . . . . . . . . . . . . . 26

1-4 SSU-2000 Configured as a Monitor-Only System . . . . . . . . . . . . . . . . . . . . . . . 26

1-5 Block Diagram of the SSU-2000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

1-6 Components in a Typical SSU-2000 Installation . . . . . . . . . . . . . . . . . . . . . . . . 35

1-7 Slot Numbering Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

1-8 Rear Panel of the SSU-2000 Main Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

1-9 Location of Power Fuses on the Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

1-10 SSU-2000 Input/Output Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

1-11 I/O Adapter Panels for Input and Output Modules. . . . . . . . . . . . . . . . . . . . . . . 48

1-12 Front View of the SDU-2000 Expansion Shelf. . . . . . . . . . . . . . . . . . . . . . . . . . 52

1-13 Rear View of the SDU-2000 Expansion Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . 53

1-14 SDU-2000 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

2-1 Shelf and I/O Adapter Rack Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

2-2 Frame and Logic Ground Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

2-3 Power Terminal Blocks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

2-4 SSU-2000 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

2-5 Installing the Output Summer Adapter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

2-6 DTE/DCE Slide Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

2-7 Alarm Terminal Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

2-8 SDU Interface (J8) and Backup Clock (J9) Connectors. . . . . . . . . . . . . . . . . . . 76

2-9 SDU Interface (J17 and J15) and Backup Clock (J16) Connectors. . . . . . . . . . 76

2-10 SSU Interface (J8) Expansion Terminator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

2-11 Wiring Diagram for a Single SDU-2000 Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . 78

2-12 Wiring Diagram for Multiple SDU-2000 Shelves . . . . . . . . . . . . . . . . . . . . . . . . 80

2-13 SSU-2000 Power Fuses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

3-1 Direct Connection Using the Serial Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

5-1 Alarm and Event Status Breakdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

6-1 Block Diagram of the Stratum 2E Clock Module . . . . . . . . . . . . . . . . . . . . . . . . 141

6-2 Front Panel of the Stratum 2E Clock Module. . . . . . . . . . . . . . . . . . . . . . . . . . . 142

6-3 Block Diagram of the Stratum 3E Clock Module . . . . . . . . . . . . . . . . . . . . . . . . 145

6-4 Front Panel of the Stratum 3E Clock Module. . . . . . . . . . . . . . . . . . . . . . . . . . . 146

6-5 Block Diagram of the Type 1 Clock Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

6-6 Front Panel of the Type 1 Clock Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

6-7 Block Diagram of the Communications Module. . . . . . . . . . . . . . . . . . . . . . . . . 153

6-8 Front Panel of the Communications Module . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

7-1 Block Diagram of the 1-Port and 3-Port E1 Input Modules . . . . . . . . . . . . . . . . 161

7-2 Front Panel of the E1 Input Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167

7-3 Block Diagram of the 1-Port and 3-Port DS1 Input Module . . . . . . . . . . . . . . . . 171

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7-4 Front Panel of the DS1 Input Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177

7-5 Block Diagram of the GPS Input Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

7-6 Front Panel of the GPS Input Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182

7-7 Block Diagram of the Composite Clock Input Module . . . . . . . . . . . . . . . . . . . . 185

7-8 Front Panel of the Composite Clock Input Module. . . . . . . . . . . . . . . . . . . . . . . 186

7-9 Block Diagram of the Japanese Sine Wave Input Module. . . . . . . . . . . . . . . . . 188

7-10 Front Panel of the Japanese Sine Wave Input Module . . . . . . . . . . . . . . . . . . . 191

7-11 Block Diagram of the Japanese Composite Clock Input Module. . . . . . . . . . . . 195

7-12 Front Panel of the Japanese Composite Clock Input Module . . . . . . . . . . . . . . 196

7-13 Input I/O Adapter for One-Port Input Modules . . . . . . . . . . . . . . . . . . . . . . . . . . 198

7-14 I/O Adapter for 3-Port Input Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199

7-15 Input Wire-Wrap Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201

8-1 Block Diagram of the E1 Output Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205

8-2 Front Panel of the E1 Output Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206

8-3 Block Diagram of the DS1 Output Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208

8-4 Front Panel of the DS1 Output Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209

8-5 Block Diagram of the Composite Clock Output Module. . . . . . . . . . . . . . . . . . . 212

8-6 Front Panel of the Composite Clock Output Module . . . . . . . . . . . . . . . . . . . . . 213

8-7 Block Diagram of the Japanese Composite Clock Output Module. . . . . . . . . . . 216

8-8 Front Panel of the Japanese Composite Clock Output Module. . . . . . . . . . . . . 217

8-9 Block Diagram of the Japanese Sine Wave Output Module . . . . . . . . . . . . . . . 219

8-10 Using the Hex Number to Identify Output Ports. . . . . . . . . . . . . . . . . . . . . . . . . 221

8-11 Front Panel of the Japanese Sine Wave Output Module. . . . . . . . . . . . . . . . . . 224

8-12 Using the Hex Number to Identify Output Ports. . . . . . . . . . . . . . . . . . . . . . . . . 227

8-13 Block Diagram of the E1/2048 kHz Output Module . . . . . . . . . . . . . . . . . . . . . . 230

8-14 Front Panel of the E1/2048 kHz Output Module . . . . . . . . . . . . . . . . . . . . . . . . 231

8-15 Block Diagram of the 2048 kHz Output Module. . . . . . . . . . . . . . . . . . . . . . . . . 234

8-16 Using the Hex Number to Identify Output Ports. . . . . . . . . . . . . . . . . . . . . . . . . 235

8-17 Front Panel of the 2048 kHz Output Module . . . . . . . . . . . . . . . . . . . . . . . . . . . 237

8-18 Block Diagram of the RS-422 Output Module . . . . . . . . . . . . . . . . . . . . . . . . . . 240

8-19 Using the Hex Number to Identify Output Ports. . . . . . . . . . . . . . . . . . . . . . . . . 241

8-20 Front Panel of the RS-422 Output Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243

8-21 Recommended Installation Schematic for the DS1 LRU . . . . . . . . . . . . . . . . . . 247

8-22 Block Diagram of the DS1 LRU Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248

8-23 Front Panel of the DS1 LRU Four-Port Module . . . . . . . . . . . . . . . . . . . . . . . . . 249

8-24 Recommended SSU-2000 Slots for Installing the DS1 LRM. . . . . . . . . . . . . . . 251

8-25 SDU-2000 Recommended Slots for DS1 LRM Installation . . . . . . . . . . . . . . . . 252

8-26 Installing the Cut-Through Assembly in the SSU-2000 . . . . . . . . . . . . . . . . . . . 253

8-27 Installing the Cut-Through Assembly in the SDU-2000 . . . . . . . . . . . . . . . . . . . 254

8-28 Orientation of the SSU-2000 I/O and CTA I/O Connector Pins . . . . . . . . . . . . . 256

8-29 Wire-wrap Identification Overlay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257

8-30 E1 LRM Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259

8-31 Front Panel of the E1 LRM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260

8-32 Sample Rack Mounting with Input Module, SSU-2000, and Output Panel . . . . 262

8-33 DE9 Output Panel for the E1 LRU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263

8-34 BNC Output Panel for the E1 LRU. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263

8-35 Front Panel of the Buffer Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265

12 SSU-2000 User Guide 12713020-002-2 Revision F – October 2006

Table of Contents

8-36 Balun Output I/O Adapter Panel for Output Module. . . . . . . . . . . . . . . . . . . . . . 266

8-37 Output I/O Adapter Panel, DE9 Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266

8-38 High-Density Wire-Wrap Output Panels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267

9-1 Time Sync Generator (TSG) System Configuration. . . . . . . . . . . . . . . . . . . . . . 270

9-2 SSU-2000 Configured as PRS System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271

9-3 SSU-2000 Configured as Monitor-Only System. . . . . . . . . . . . . . . . . . . . . . . . . 272

9-4 SSU-2000 I/O Adapter Panels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 279

9-5 SDU-2000 Synchronization Distribution Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 279

12713020-002-2 Revision F – October 2006 SSU-2000 User Guide 13

Table of Contents

14 SSU-2000 User Guide 12713020-002-2 Revision F – October 2006

Table of Contents

Tables

1-1 Slot Assignments for Specific Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

1-2 Versions of Software for the Communications Module. . . . . . . . . . . . . . . . . . . . 50

1-3 Expansion Shelf Addresses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

2-1 I/O Module Slot to I/O Connector Relationship . . . . . . . . . . . . . . . . . . . . . . . . . 67

2-2 Communications Port Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

2-3 EIA-232 Connector Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

2-4 Alarm Relay Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

2-5 Communications and Buffer Module LED Indications . . . . . . . . . . . . . . . . . . . . 86

3-1 Communications Port Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

3-2 Firmware Requirements for Security Features . . . . . . . . . . . . . . . . . . . . . . . . . 94

3-3 User Access Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

4-1 SSU-2000 Readiness Checklist. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

4-2 Commissioning Test Data Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

5-1 SSU Corrective Action Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

5-2 SDU Corrective Action Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

5-3 SSU-2000 Troubleshooting Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

5-4 SDU-2000e Troubleshooting Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

6-1 Stratum 2E Clock Module Status LED Indicators. . . . . . . . . . . . . . . . . . . . . . . . 142

6-2 Stratum 2E Clock Module Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

6-3 Stratum 3E Clock Module Status LED Indicators. . . . . . . . . . . . . . . . . . . . . . . . 146

6-4 Stratum 3E Clock Module Performance Specifications . . . . . . . . . . . . . . . . . . . 147

6-5 Type 1 Clock Module Status LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

6-6 Type 1 Clock Module Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

6-7 Communications Module Status LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . 154

6-8 Communications Module Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

7-1 E1 Input Module Alarm Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163

7-2 E1 Input Module Event Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166

7-3 E1 Input Module Status LED Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167

7-4 E1 Input Module Configuration Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168

7-5 DS1 Input Module Alarm Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173

7-6 DS1 Input Module Event Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176

7-7 DS1 Input Module Status LED Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177

7-8 DS1 Input Module Configuration Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178

7-9 GPS Input Module Status LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182

7-10 GPS Input Module Configuration Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183

7-11 Composite Clock Input Module Status LED Indicators . . . . . . . . . . . . . . . . . . . 186

7-12 Composite Clock Input Module Configuration Settings . . . . . . . . . . . . . . . . . . . 187

7-13 Japanese Sine Wave Input Module Status LED Indicators . . . . . . . . . . . . . . . . 192

7-14 Japanese Sine Wave Input Module Configuration Settings. . . . . . . . . . . . . . . . 192

7-15 Japanese Composite Clock Input Module Status LED Indicators . . . . . . . . . . . 196

7-16 Japanese Composite Clock Input Module Configuration Settings . . . . . . . . . . . 197

12713020-002-2 Revision F – October 2006 SSU-2000 User’s Guide 15

Table of Contents

7-17 Pinout for the I-Port Input Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198

7-18 Pinout for the 3-Port Input Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200

7-19 Input Wire-Wrap Adapters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200

8-1 E1 Output Module Status LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206

8-2 E1 Output Module Performance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 207

8-3 DS1 Output Module Status LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209

8-4 DS1 Output Module Performance Specifications. . . . . . . . . . . . . . . . . . . . . . . . 210

8-5 Composite Clock Output Module Status LED Indicators . . . . . . . . . . . . . . . . . . 213

8-6 Composite Clock Output Module Performance Specifications. . . . . . . . . . . . . . 214

8-7 Japanese Composite Clock Output Module Status LED Indicators. . . . . . . . . . 217

8-8 Japanese Composite Clock Output Module Configuration Settings. . . . . . . . . . 218

8-9 Identifying Failed Ports From The Hex Digit. . . . . . . . . . . . . . . . . . . . . . . . . . . . 221

8-10 Japanese Sine Wave Output Module Status LED Indicators. . . . . . . . . . . . . . . 224

8-11 Japanese Sine Wave Output Module Configuration Data . . . . . . . . . . . . . . . . . 225

8-12 Identifying Failed Ports from the Hex Digit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228

8-13 E1/2048 kHz Output Module Status LED Indicators . . . . . . . . . . . . . . . . . . . . . 231

8-14 E1/2048 kHz Output Module Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . 232

8-15 Identifying Failed Ports from the Hex Digit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236

8-16 2048 kHz Output Module Status LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . 238

8-17 2048 kHz Output Module Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238

8-18 Identifying Failed Ports from the Hex Digit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242

8-19 RS-422 Output Module Status LED Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . 244

8-20 RS-422 Output Module Performance Specifications . . . . . . . . . . . . . . . . . . . . . 244

8-21 LRM Kits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245

8-22 DS1 LRU Module Status LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249

8-23 SSU-2000 and CTA I/O Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255

8-24 Line Re-timing Module Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257

8-25 Status LED Indicators on the E1 LRU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261

8-26 E1 Line Re-timing Module Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263

8-27 Buffer Module LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265

8-28 Adapter Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267

9-1 Minimum Software Versions for Subtending Operation . . . . . . . . . . . . . . . . . . . 276

9-2 Files Required for Upgrading the Firmware. . . . . . . . . . . . . . . . . . . . . . . . . . . . 277

9-3 SSU-2000 System Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 279

16 SSU-2000 User’s Guide 12713020-002-2 Revision F – October 2006

How to Use This Guide

This section describes the format, layout, and purpose of this guide.

In This Preface

 Purpose of This Guide  Who Should Read This Guide  Structure of This Guide  Conventions Used in This Guide  Warnings, Cautions, Recommendations, and Notes  Related Documents and Information  Where to Find Answers to Product and Document Questions  What’s New in This Document

12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 17

How to Use This Guide

Purpose of This Guide

The SSU-2000 User’s Guide describes the procedures for unpacking, installing, using, maintaining, and troubleshooting the Symmetricom SSU-2000 Synchronization Supply Unit. An accompanying document, the SSU-2000 Technical Reference (12713020-003-2) describes default alarms and events, the languages you use to communicate with the SSU-2000, default values, and other information.

Who Should Read This Guide

Chapter 1, Product Overview, is written for non-technical audiences who need

general information about the product. Chapter 2, Installing the SSU-2000 and subsequent chapters contain technical information about the product. Other chapters and appendixes describe installation, maintenance, and configuration instructions or details primarily intended for qualified maintenance personnel.

This user guide is designed for the following categories of users:

 Systems Engineers – Chapter 1 provides an introduction to the SSU-2000.

Cross-references in this chapter direct you to detailed system information in other chapters as appropriate.

 Installation Engineers – Chapter 2 through Chapter 9 and the Appendices

provide detailed information and procedures to ensure proper installation, turn-up, operation, configuration, and testing of the SSU-2000.

 Maintenance Engineers – Chapter 5 and the Appendices provide preventive and

corrective maintenance guidelines, as well as procedures for diagnosing and troubleshooting fault indications and alarms.

While Chapter 1 is written for non-technical audiences who need information about the SSU-2000 system, others, such as Chapter 2 through Chapter 9 contain detailed information and instructions which are intended to be performed by qualified personnel only.

18 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007

How to Use This Guide

Structure of This Guide

This guide contains the following chapters and appendixes:

Chapter, Title Description

Chapter 1, Product Overview Provides an overview of the product and describes the major

hardware and software features.

Chapter 2, Installing the SSU-2000 Contains procedures for unpacking and installing the product. Chapter 3, Provisioning and

Operating the SSU-2000 Chapter 4, Commissioning Provides checklist-based commissioning tests that should be

Chapter 5, Maintenance and Troubleshooting

Chapter 6, Clock and Communications Module Reference Data

Chapter 7, Input Module Reference Data

Chapter 8, Output Module Reference Data

Chapter 9, Hardware Configuration Guide

Index

Describes

the SSU-2000 after installing the unit.

performed after completing turn-up a nd software configuration

to ensure the system is ready for normal operation.

Contains preventive and corrective maintenance, and

troubleshooting procedures for the product.

Provides detailed information on the Commu nications module

and the various Clock modules available for use in the

SSU-2000.

Contains detailed information on the Input modules available

for use in the SSU-2000.

Describes the Output modules available for use in the

SSU-2000 and the SDU-2000.

Describes how to configure the SSU-2000 in several modes,

and lists part numbers for shelves, modules, and accessories.

Provides references to individual topics within this guide.

the ICS and TL1 commands required to provision

Conventions Used in This Guide

This guide uses the following conventions:

 Acronyms and Abbreviations – Terms are spelled out the first time they appear

in text. Thereafter, only the acronym or abbreviation is used.

 Revision Control – The title page lists the printing date and versions of the

product this guide describes.

 Typographical Conventions – This guide uses the typographical conventions

described in the table below.

12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 19

How to Use This Guide

When text appears

this way...

SSU-2000 User’s Guide The title of a document. SSU

CRITICAL Select File, Open... Click the Open option on the File menu. Press

Enter

Press ;

SSU Username:

PING STATUS

A re-timing application A word or term being emphasized. Symmetricom does not

recommend...

An operating mode, alarm state, status, or chassis label.

A named keyboard key. The key name is shown as it appears on the keyboard. An explanation of the key’s acronym or function immediately follows the first reference to the key, if required.

Text in a source file or a system prompt or other text that appears on a screen.

A command you enter at a system prompt or text you enter in response to a program prompt. You must enter commands for case-sensitiv e operating systems exactly as shown.

A word or term given special emphasis.

... it means:

Warnings, Cautions, Recommendations, and Notes

Warnings, Cautions, Recommendations, and Notes attract attention to essential or critical information in this guide. The types of information included in each are explained in the following examples.

Warning: To avoid serious personal injury or death, do not disregard warnings. All warnings use this symbol. Warnings are installation, operation, or maintenance procedures, practices, or statements, that if not strictly observed, may result in serious personal injury or even death.

Caution: To avoid personal injury, do not disregard cautions. All cautions use this symbol. Cautions are installation, operation, or maintenance procedures, practices, conditions, or statements, that if not strictly observed, may result in damage to, or destruction of, the equipment. Cautions are also used to indi cat e a lon g- te rm health hazard.

20 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007

How to Use This Guide

ESD Caution: To avoid personal injury and electrostatic discharge (ESD) damage to equipment, do not disregard ESD cautions. All ESD cautions use this symbol. ESD cautions are installation, operation, or maintenance procedures, practices, conditions, or statements that if not strictly observed, may result in possible personal injury , electrostatic discharge damage to, or destruction of, static sensitive components of the equipment.

Electrical Shock Caution: To avoid electrical shock and possible personal injury, do not disregard electrical shock cautions. All electrical shock cautions use this symbol. Electrical shock cautions are practices, procedures, or statements, that if not strictly observed, may result in possible personal injury, electr ical shock damage to, or destruction of components of the equipment.

Recommendation: All recommendations use this symbol. Recommendations indicate manufacturer-tested methods or known functionality. Recommendations contain installation, operation, or maintenance procedures, practices, conditions, or statements, that provide important information for optimum performance results.

Note: All notes use this symbol. Notes contain installation, operation, or maintenance procedures, practices, conditions, or statements, that alert you to importa nt information, which may make your task easier or increase your understanding.

Chapter 1 Product Overview

This chapter describes the SSU-2000, and provides a theory of operation for the unit. The SDU-2000 expansion shelf is introduced and described.

In This Chapter

 Overview  Typical System Configurations  System Architecture  System Components  Communications Protocol  Overview of SSU-2000 Operation  Indicators and Controls  SDU-2000 Synchronization Distribution Unit

12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 23

Chapter 1 Product Overview

Overview

The SSU-2000 Synchronization Supply Unit (SSU-2000), shown in Figure 1-1, is a high-performance, Synchronization Status Messaging (SSM)-compliant Timing Signal Generator (TSG) or Synchronization Supply Unit that provides network synchronization signals for the telephone and telecommunications industry.

Figure 1-1. SSU-2000 Synchronization Supply Unit

The SSU-2000 conforms to specifications for International, European and North American applications as a Primary Reference Source (PRS), and Synchronization Supply Unit (SSU), and Timing Signal Generator (TSG). The SSU-2000 allows for the integration of a variety of synchronization reference schemes including GPS and land line DS1/E1. The SSU-2000 meets or exceeds performance requiremen t s for ANSI and Telcordia Technologies (Bellcore) Stratum 2 and ITU and ETSI T ype II Transit Node clocks.

The SSU-2000 is designed to comply with the application flexibility and redunda ncy concepts introduced in Telcordia Technologies (formerly Bellcore) GR-2830. A selection of hot-swappable modules and powerful software allow users to easily reconfigure, upgrade, or expand the SSU-2000 to meet a variety of telecommunications synchronization application requirements.

The SSU-2000 fully supports Synchronization Status Messaging (SSM) as defined by ANSI, Telcordia Technologies, ITU, and ETSI.

24 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007

The SSU-2000 is fully user-configurable and manageable through a software interface. Modules can be inserted or removed from the SSU-2000 while the system is operational without any degradation of output signals. Each module supports the management of critical, major and minor alarms, locally and remotely. Output modules and clock modules can be configured in redundant pairs, further increasing system availability.

The SSU-2000 has extensive event detection, reporting, alarming, and storage capabilities that permit monitoring of the system from external sites. Events are defined as changes in conditions within the unit, or at the interfaces of the unit, which may indicate abnormal operation or a change in the unit’s operational st atus. For example, an event may be a parameter which exceeds a user-set threshold (usually 2 thresholds are provided). Each event can be assigned by the user to one of four modes, including IGNORE, REPORT, ALARM, or FAIL.

Typical System Configurations

The modular design of the SSU-2000 permits a great deal of flexibility in configuring the system components for a variety of applications. Three of the more common configurations include:

Chapter 1 Product Overview

Typical System Configurations

 Time Signal Generator (TSG) configuration  Primary Reference Source (PRS) configuration  Monitor-only configuration

Timing Signal Generator (TSG) Configuration

The Timing Signal Generator (TSG) configuration shown in Figure 1-2 allows for input of external references to which the Clock modules are phase- and frequencylocked. This configuration allows for monitoring of several inputs, and for synchronization of output signals.

Figure 1-2. SSU-2000 Configured as a TSG

12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 25

Chapter 1 Product Overview

Typical System Configurations

Primary Reference Source (PRS) Configuration

In a Primary Reference Source (PRS) configuration (Figure 1-3), the SSU-2000 meets the specifications defined in American National Standards Institute (ANSI) T1.101-1999. ANSI defines a Primary Reference Source as “equipment that

provides a timing signal whose long term accuracy is maintained at 1x10 better, with verification to Universal Coordinated Time (UTC), and whose timing signal may be used as the basis of reference for the control of other clocks within a network”. If standard Input modules are installed in the remaining input slots, this configuration also allows for monitoring of up to 24 external signals, such as DS1, E1, composite clock, and various clock frequencies. Time-of-day functionality is available through an Ethernet port employing NTP.

-11

Figure 1-3. SSU-2000 Configured as a Primary Reference Source

SSU-2000 Configured as a Monitor-Only System

The SSU-2000 can also be configured as a monitor-only system (Figure 1-4) in which one of the inputs is designated as the reference, and a clock module is locked

directly to this signal. The remaining input signals are then compared to the phase-locked oscillators (and indirectly to the designated input reference).

The SSU-2000 continuously monitors the integrity of the incoming timing signal. The operator defines input acceptance criteria and sets parameters for alarming. When the incoming signal is acceptable (within the performance limits set by the operator), the SSU-2000 phase-locks to the signal on a priority basis.

Figure 1-4. SSU-2000 Configured as a Monitor-Only System

26 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007

System Architecture

The SSU-2000 system is a Timing Signal Generator that generates, monitors, controls, and distributes network synchronization signals. These signals can be DS1, E1, Composite Clock (CC), sinusoids, or square waves. The SSU-2000 continuously monitors incoming timing signal integrity. The operator defines input acceptance criteria and sets parameters for alarming. If a reference signal is acceptable (within the performance limits set by an operator), the SSU-2000 frequency-locks to the signal on a priority basis. System holdover and filtering performance is dependent on the quality of oscillators used in the SSU-2000’s internal Clock modules (Type 1, Stratum 2E or Stratum 3E).

A selection of hot-swappable modules and powerful software allows users to easily configure, upgrade, or expand the SSU-2000 shelf to meet a variety of telecommunications synchronization application requirements. Modules can be inserted or removed from the SSU-2000 while the shelf is operational without any degradation of output signals. Each module supports the management of critical, major, and minor alarms. Output modules and Clock modules can be configured in redundant pairs for increased reliability.

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System Architecture

A simplified block diagram for the SSU-2000 is shown in Figure 1-5.

Figure 1-5. Block Diagram of the SSU-2000

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As indicated in Figure 1-5, the SSU-2000 consists of four major sections:

 Input section  Clock section  Output section  Communications section

Input Section

The input section consists of one to nine Input modules to which you connect reference signals that are tested for signal integrity; the Input modules are described in Chapter 7, Input Module Reference Data. You provision each input using the Interactive Command Set (ICS) INPUT and REF commands or the Transaction Language One (TL1) SET-PRMTR-INPUT and SET-INPUT-REF commands.

The Input modules measure the phase between the input signal and the clock oscillator(s). From these phase measurements, the DS1/E1 Input modules compute frequency offset and wander of the input signals. Wander is reported in terms of Maximum Time Interval Error (MTIE) and Time Deviation (TDEV). The data is then stored for use in the SSU-2000 and reported through the Communications module. You can install one or two GPS Input modules that use the satellite-based Global Positioning System signals as a synchronization reference.The Input signal types supported are:

 DS1/Clock (unframed)  E1/Clock (unframed)  GPS  Composite Clock  Japan Composite Clock  Japan Sine Wave

Selecting the Input

Many factors influence which input reference the SSU-2000 uses:

 Priority  PQL/SSM  Switching mode  User-assigned Input S tate  Active alarms on an input

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You can provision the SSU-2000 to automatically select the highest-quality input signal, or you can manually select the input signal you want to use. Two factors determine the quality of the input: the user-defined Priority level, and the PQL/ SSM. These factors are used to determine which input is used, and what happens if that input becomes disqualified.

Priority Level

You can assign a Priority level to each input; this value helps determine which input is used as the system reference. The range is 0 to 10; the lower the Priority level, the higher the priority. Use the TL1 command SET-PRMTR- INPUT or the ICS command INPUT to provision this parameter . See Setting the Input Selection Mode, on page 30, for details on using the Priority level.

SSMs and Quality Level

Synchronization Status Messages (SSMs) may be included in the bit stream of the incoming signal to indicate its quality level. To read the incoming SSM, you must provision the input to read the SSM; for E1 signals, you must also provision the bit position of the incoming SSM. Use the TL1 command SET-PRMTR-INPUT or the ICS command INPUT to provision these parameters.

If the incoming signal does not include SSMs, or if you disable them, then you can provision the Quality Level to an appropriate value. The PQL value is used in the same manner as the incoming SSM to determine which input is used when the active input is disqualified. SSMs are described in more detail in Synchronization

Status Messages (SSMs), on page 51.

Setting the Reference Switching Mode

Telcordia GR-378 and GR-1244 define two reference selection modes: Revertive and Non-revertive. In the Revertive mode, if an input used as the system reference is disqualified (for any reason), the reference switches to the next-highest input and reverts to the initial input when that input is re-qualified. In this mode, the reference switches two times: once when the disqualifying event occurs, and again when the initial input is re-qualified. In the Non-revertive mode, the system reference switches to the next-highest input but does not revert to the initial input when the initial input is re-qualified. The system reference switches only once when the disqualifying event occurs.

The ICS command REF and the TL1 command SET-INPUT-REF allows you to set the reference switching mode to AutoReturn, AutoSwitch, or OFF. The AutoReturn mode is Revertive, and enables automatic switching with automatic return to the input with the highest Priority or PQL level. The AutoSwitch mode is Non-revertive; the reference automatically switches to the next-highest input on failure of the selected input. When set to OFF, only manual switching is allowed. If the selected reference input is disqualified for any reason, the clock enters the Holdover mode and you must correct the fault and re-provision the reference input.

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Setting the Input Selection Mode

The ICS command REF and the TL1 command SET-INPUT-REF determine what type of reference input selection and reference switching is used. You can set the input selection to either Priority or PQL. The reference switching mode is either Autoreturn, Autoswitch, or No switching.

After you select the reference switching mode, the Input module reads and processes the Priority level and PQL value to determine the traceability of inputs. This traceability information is then used by the Clock modules in selecting a reference signal and for embedding the SSM into the outputs.

If you select Priority mode, the SSU-2000 selects the input reference with the highest user-defined Priority setting; if all inputs have the same Priority level, then the input with the highest PQL (quality level, SSM) is used.

If you select PQL mode, the SSU-2000 selects the input reference with the highest assigned PQL level or associated SSM; if all inputs have the same PQL/SSM value , then the input with the highest Priority levels is used. In either case, error conditions such as Loss of Signal (LOS), Out of Frame (OOF), MTIE, TDEV, and Phase performance data collected at the input s are used to disqualify input s (prevent inpu t selection) based on user defined thresholds.

In either mode, when the Priority and PQL values are equal for each input, the physical location of the Input module determines the priority for selecting the input reference. Port 1 on the Input module in the leftmost slot has the highest priority; the priority decreases to port 1 on the Input module in the rightmost slot. Port 2 on the module in the leftmost slot has the next lower priority, decreasing to Port 2 on the Input module in the rightmost slot. Port 3 on the module in the leftmost slot has the next lower priority, and Port 3 on the module in the rightmost slot has the lowest priority.

If the Input module is configured for provisioned mode, it reports the user-assigned SSM. If it is configured for automatic mode, the Input module uses the most recent valid SSM. If a valid SSM is not received, the module uses the user-assigned SSM.

Setting an Input Alarm Strategy

You can provision the SSU-2000 to elevate input alarms to the next higher level after a specified amount of time. You can also specify that an alarm clears automatically after a specified period of time without the alarm condition. For more information on alarms, see Alarms and Events, on page 32.

Bypass Clock (Clock C)

In the event that both Clock modules fail, an input connected to a D1, E1, or Composite Clock Input module can serve as the system reference. The input must be a valid reference, and it must have a Priority setting. When the Bypass clock is the active reference, then the output signal is not filtered and any wander or jitter on the input signal appears on the outputs. The Bypass clock is intended only for short-term use; you should resolve the failures on the Clock modules as quickly as possible.

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Output Section

The output section contains from one to six (three redundant p airs) Output modules in the main shelf and up to 56 (28 redundant pairs) Output modules in a fully expanded system with four SDU-2000 expansion shelves. Each Output module type provides 20 independent output synchronization signals. Output modules are available to support the following formats:

 DS1, SF (D4) and ESF  E1  2048 kHz  Composite Clock (CC) (64/8 kHz)  Other typical clock frequencies

Clock Section

The clock section consists of one or two Clock modules that provide the internal reference signals for generating TSG output timing signals. The primary Clock module (Clock A) is configured as the master clock and is normally a higher stratum level than the back-up clock (Clock B). If a problem occurs in Clock A, the control is automatically passed to the back-up Clock module (Clock B). The freque ncy of each clock is locked to a valid reference input signal (one that is free from input faults while meeting acceptable frequency and MTIE specifications).

The SSU-2000 controls clock frequency by adjusting the control value of the Direct Digital Synthesis (DDS) function in each Clock module. The adjustments are processor-controlled and based on measurements performed and computed in the Input module(s). Clock modules may be T ype 1, S tratum 2E, or Stratum 3E. Outputs are maintained by the active input reference signal if both clocks should ever fail or be removed from the system.

Communications Section

The Communications section consists of one Communications module, which contains hardware and software that allows the user to configure, monitor, and control the SSU-2000 system and generate local and remote alarms when fault conditions are detected. The SSU-2000 can continue to function seamlessly without the Communications module (Clock modules assume the system controller function), but all communications and alarm reporting functions are interrupted.

The master controller function for the SSU-2000 can reside in either the Communications module or in either of the clock modules. The priority of the selection of the module that will provide the master controller function rests with the Communications module, Clock A, and Clock B, in that order. In the event of removal of the module designated as the master controller, that function automatically and seamlessly switches to the next module in priority order.

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The Communications module communicates with the other modules in the SSU-2000 to read configuration data, set operational parameters, and determine what type of modules are installed. When a module is replaced, the controller loads the correct operational parameters into the replacement module.

The Communications module provides an interface between the user and the SSU-2000 system. This interface allows the user to display and control much of the activity in the SSU-2000 system and within the optional SDU-2000 expansion system. The Communications module supports three serial ports and one Ethernet port, and allows communication over each of them independently in one of several possible modes (ASCII, TL1, or packet).

The software in the Communications module allows for on-site reprogramming of the flash ROM and reconfiguration of all programmable logic devices. The Communications module also allows for this same capability for the input and clock modules. The software on all other module types installed in the SSU-2000 system can be updated by downloading it through the Communications module.

When the Communications module is installed, it performs an initial software verification test to verify operation. If the module is installed in the SSU-2000 with power already applied and with other modules installed, the Communications module reads the configuration of the modules in the SSU-2000 and the mod ules in all installed SDU-2000 expansion shelves. This information is saved in nonvolatile memory in the Communications module. If power is applied to the SSU-2000 after the Communications module is installed, it initializes before of any of the other modules and provides configuration information to the individual modules.

Note: The Clock modules also store configuration information and can download this information to the various modules if the Communications module is removed from the shelf.

Alarms and Events

The SSU-2000 has extensive event detection, reporting, and alarm generation and storage capabilities that permit monitoring of the system from external sites.

Alarms are conditions within the unit or at the interfaces of the unit which may indicate abnormal operation or a change in the unit’s operational status. For example, an alarm may be generated when a parameter which exceeds a user-set threshold. Most alarms can be assigned by the user to one of the following modes: IGNORE, REPORT, MINOR, MAJOR, or CRITICAL.

All Alarms detected in the SSU-2000 system are reported by three methods, including:

 Display on the module LEDs  Relay contact closures on the rear panel of the SSU-2000 main shelf  Messages transmitted on all communications ports

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All Alarm indications clear when the condition(s) that caused them no longer exist. In a case where a module in alarm is unplugged from the system, a command must be issued to clear the module’s active alarms. In addition, normal operating status is indicated by green LEDs on the modules.

Events are conditions within the unit, or at the interfaces of the unit, which may indicate abnormal operation or a change in the unit’s operational status. Recurring events may be escalated to alarm status and may require action by the user. Conversely, alarms may be de-escalated and corrected automatically. See the SSU-2000 Technical Reference for details.

Although every alarm is considered to be an event, not every event is an alarm. For example, a login is recorded as an event but is not considered to be an alarm. In this case, no action is required by the user.

Ignore Mode

IGNORE means that appropriate information on the event is transmitted on all of the communications ports when the event occurs, and on demand, but no alarm is

generated. For example, the status of the SSM at each input port and at the output ports is reported when it changes and when the user sends an inquiry but no alarm is generated.

Report Mode

The REPORT mode option is used to report alarm indications only. An ALARM command is available in the SSU-2000 that allows a user to view the

current status of alarm indications on the unit and set alarm delay intervals and activation levels. Only active alarm indications are displayed unless an option is specified.

The DELAY option sets the length of time in seconds an alarm must be active before generating a hardware indication. This option also allows the user to set the level of any alarms:

 IGNORE – ignore any alarm indication  REPORT – report only alarm indications  MINOR – sets alarm level to MINOR  MAJOR – sets alarm level to MAJOR  CRITICAL – sets alarm level to CRITICAL

See the SSU-2000 Technical Reference for information on the DELAY option.

Alarm Mode

The user sets an alarm to one of three levels of alarm severity: MINOR, MAJOR or CRITICAL. In general, events which are classified as ALARMS are those for which user intervention is required. MINOR and MAJOR alarms can be elevated automatically to the next higher level after a user-set time period.

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Input ports are disqualified as a possible system reference when their alarm level is Major or Critical. The SSU-2000 switches to a redundant module or component when the currently-active module or component has a Major or Critical alarm. For example, an active Clock module with a Major or Critical alarm causes the secondary Clock module to become the active Clock module.

The unit is capable of generating reports to include: local oscillator being switched, log in/out, restart, board removed/inserted, events cleared, PLL loop control, user image clear/set, phase samples, frequency control, and a keep alive output every 5 minutes. See the SSU-2000 Technical Reference for information on commands.

Alarms and all events are reported over the communication ports and contain details of the event in a single message including the time of the event. All ALARM indications clear when the conditions that caused them no longer exist. In addition, normal operating status is indicated by green LEDs on the front panel of modules.

Fail Mode

In the FAIL mode, the SSU-2000 removes the failed module from service or usability to prevent interruption of the system. For example, a FAIL event detected in Clock A causes a switchover from Clock A to Clock B, effectively removing Clock A from the system. The FAIL event is reported on all communications ports and an alarm is generated.

System Components

A fully expanded SSU-2000 installation contains the following physical compone nt s:

 SSU-2000 Main shelf populated with various combinations of Clock, Input,

Output and Communications modules

 Input and Output Adapter panels  Up to four SDU-2000 Expansion shelves containing Buffer and Output modules

Note: For additional information about each of the module types, see

Chapter 6, Clock and Communications Module Reference Data, Chapter 7, Input Module Reference Data, and Chapter 8, Output Module Reference Data. See Chapter 9, Hardware Configuration Guide, for component part numbers and guidelines for configuring a

new system.

SSU-2000 Main Shelf (Chassis)

The SSU-2000 main shelf (shown in Figure 1-6) contains a metal chassis and a motherboard with provisions for supporting up to 12 hot-swappable modules. Filler panels are available for use in shelves that are not fully populated.

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Figure 1-6. Components in a Typical SSU-2000 Installation

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Module Assignments

All SSU-2000 modules are equipped with card ejectors and plug in from the front of the shelf. Each module is secured in the shelf with captive fasteners.The module assignments for the SSU-2000 main shelf are listed in Table 1-1 and are shown in

Figure 1-7.

Table 1-1. Slot Assignments for Specific Modules

Slot Module

A1 Clock Module A A2 Communications Module A3-A11 Input or Output Modules A12 Clock Module B

Figure 1-7. Slot Numbering Assignments

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As indicated in Figure 1-7, the SSU-2000 modules are installed in slots A1 through A12, numbered left to right as viewed from the front of the shelf. The first or left-most slot, A1, is assigned to the primary clock module (Clock A). Slot A2 is assigned to the Communications module and slots A3 through A11 are assigned to various combinations of input modules and output modules. Slot A12 is reserved for the secondary clock module (Clock B).

Main Shelf Connections

The rear panel of the main shelf contains the connection terminal strips, BNC connectors, and SCSI-II connectors that are used to connect the SSU-2000 to other system components. These connection features are described in F igure 1-8.

Figure 1-8. Rear Panel of the SSU-2000 Main Shelf

The SSU-2000 main shelf connection features include:

 I/O connectors (I/O-1 through I/O-9)- 50-Pin, Micro-D female connectors (SCSI-II

type) used for connecting the I/O adapter panels to the SSU-2000. Each I/O connector is associated with a specific I/O module slot. I/O adapter panels are available to convert the 50-Pin, Micro-D female connectors to telecommunications standard Balun (balanced/unbalanced) or DE9 connectors, see the SSU-2000 Technical Reference for additional details

 Dual set of power terminals and dual set of grounding lugs for connecting

external power and grounding to the SSU-2000 system

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 Three communications ports including two serial port connections (Serial Port-A

and Serial Port-B) and one RJ-45 Ethernet connector (Ethernet 10-Base-T). Another serial communication port is also available on the front of the Communications module

 DTE/DCE switch is a slide switch (S1) that allows the user to select eithe r a DTE

or DCE serial port interface.

 Reference inputs and clock outputs  Local and remote alarm contact closures, divided into three classes:

CRITICAL Alarms – Indicates an immediate service-affecting condition that

–

requires immediate user intervention (such as loss of Communications module, loss of input power to the shelf, etc.). When a critical alarm cond ition is detected, the CRITICAL ALARM relay is activated (alarm condition) and the CRITICAL ALARM LED on the front of the Communications module lights red unless power was interrupted. In this case the unit no longer has power

– MAJOR Alarms – Indicates a condition that may require immediate user

intervention. When a major alarm condition is detected, the major alarm relay on the rear panel of the SSU-2000 is activated and the MAJOR ALARM LED on the front of the Communications module lights red.

– MINOR Alarms – Indicates that the unit performance is degrading. The

minor relay is activated and the MINOR ALARM indicator lights.

 Two local oscillator connections – Local OSC-A and Local OSC-B are normally

used as outputs to feed other equipment but can also be used as inputs whe n the shelf is configured with plug-in modules as a monitor only.

 Two antenna connectors – used to attach radio receiver antennas. The A

antenna connector (J6) connects to slot 1A3; the B antenna connector (J7) connects to slot 1A5.

 Interface connector for the optional SDU-2000 Synchronization Distribution Unit

(output signal expansion system). Up to four expansion shelf can be connected in daisy-chain fashion to an SSU-2000 shelf. A termination plug must be inst alled on this connector if not using the expansion shelf.

 SDU Backup Clock (D-clock) that can be used in the expansion shelf in the event

of the loss of clock A or B. The shelf also has optional rack mounting ears for mounting in 19 inch EIA, 23 inch EIA and AT&T, and ETSI racks and cabinets.

Main Shelf Power Distribution

The main shelf accepts redundant –48 VDC power inputs from external supplies and makes these inputs available to the modules via the motherboard connectors anytime the 5-Amp fuses are installed on the rear of the SSU-2000 main shelf.

An On/Off switch is not provided, preventing anyone from accidently shutting down the system. To shut down the system, the two fuses (Power Supply A and Power Supply B fuses) must be physically removed from the rear panel of the shelf (see

Figure 1-9). If only one fuse is removed, the system senses the loss of the power

input and switches to the second power input.

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All power supplies for the SSU-2000 are implemented on the individual modules which increases system availability by eliminating a single point of failure in the power supply area. On each plug in module, diodes combine the two po wer sources and provide protection from reversal of the power connections on the shelf (+ and – reversed). Screw type lugs on the rear of the shelf are used for logic and shelf ground connections.

Figure 1-9. Location of Power Fuses on the Rear Panel

Antenna Connectors

The SSU-2000 contains two TNC connectors to allow for connection of a radio antenna. Connector J6 is wired into I/O slot A3 and connector J7 is wired into I/0 slot A5 (the only slots that can be used for installing a Radio input module). A variety of GPS antennas are available as accessories, see the SSU-2000 Technical Reference.

Communication Ports

The SSU-2000 main shelf contains four communication ports, including:

 Two RS-232 communication ports (Port A and Port B) on the rear panel of the

main shelf

 One RS-232 port on the face of the Communications module (Port C)  One RJ-45 Ethernet connector on the rear panel of the SSU-2000 (Ethernet

10-Base-T) for network connection

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A user interface (software residing in the Communications module) provides various levels of password-protected access for configuration, detailed performanc e monitoring, and diagnostics. Refer to information on configuration and detailed performance monitoring. Remote EIA-232-C ports can be assigned their own interface type, either Interactive Command Set (ICS) or TL1 that is retained in NVRAM. The Local port (Port C on the Communications module) is always in ICS mode when the Communications module restarts.

Main Shelf Power Connections

The SSU-2000 main shelf contains provisions for connecting redundant –48 VDC external power inputs (designated A and B input power). The power supplies, located on the internal modules, can accept input power in the range of –37 to –72 VDC.

Each power input to the main shelf is accomplished using a 2-connection terminal strip, with the negative side fused. Both connections are isolated from frame and signal grounds.In the event of the loss of either the A or B input, the system senses the loss of power, reports the loss of the power input and continues normal operation on the remaining power input. If both power supply inputs are lost, the Critical Alarm relay de-energizes to the alarm state and a Critical alarm is reported.

the SSU-2000 Technical Reference

for more

Main Shelf Frame/Logic Grounds

Screw type lugs on the rear of the shelf are used for logic and shelf ground connections. Grounding for integrated or isolated ground planes are supported by two user-configured hardware straps.

SSU-2000 Family of Modules

The SSU-2000 family of modules includes the following:

 Stratum 2E Clock Module  Stratum 3E Clock Module  Type 1 Clock Module  Communications Module  1-Port and 3-Port E1 Input Modules  1-Port and 3-Port DS1 Input Modules  Composite Clock Input Module

 Japan Sine Input Module  Japan Composite Clock Input Module  GPS Input Module

 2048 kHz Output Module  RS-422 Output Module

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 E1 Output Module  DS1 Output Module  Composite Clock Output Module

 Japan Sine Output Module  Japan Composite Clock Output Module  DS1 Line Re-Timing Module  E1 Line Re-Timing Module

Some of the features common to all modules include:

 Any module can be inserted or removed while power is applied without affecting

the operation of other modules in the system.

 All modules are individually fused to protect the system in case of a short circuit

on any one module.

 All modules have front panel status LEDs.  All modules are equipped with ejector tabs for ease of installation and removal

and secured in place with captured screws to provide module security and reduce the occurrence of unauthorized removal.

 All SSU-2000 modules (except the Buffer module) have an integrated CPU with

firmware and are software configurable.

Each module slot also has three pins connected together on its assigned Hybrid DIN connector which permits the system to detect when a particular module is removed. More information is available for each of these modules in Chapter 7,

Input Module Reference Data.

Clock and Communications Modules

Stratum 2E Clock Module

The Stratum 2E Clock module uses a Rubidium oscillator and meets the requirements of ANSI and Telcordia Industries (Bellcore) for Stratum 2 clocks. This clock also meets the ITU-T and ETSI specifications for Type II Transit Node clocks.

The module reads measurement data from the input modules, provide frequency control of its oscillator through DDS circuitry, and generates a reference signal used by the input and output modules. The clock module also maintains phase synchronization with the redundant clock module. For more information, see

Stratum 2E Clock Module, on page 140.

Stratum 3E Clock Module

The Stratum 3E Clock module meets or exceeds performance requirements for ANSI and Bellcore Stratum 3E and ITU and ETSI Ty pe III Local Node clocks.

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The Stratum 3E C lock Module reads measu rem ent data from the Input modules, provide frequency control of the oscillators through DDS circuitry, and generates a reference signal used by the Input and Output modules. The Clock module maintains phase synchronization with the redundant Clock module. Its hardware and software also provides for temperature compensation, aging compensation for quartz oscillators, an initial offset adjustment, and frequency adjustment resolution of 1 x

-13

or better. For more information , see

Type 1 Clock Module

The Type 1 Clock module uses a quartz oscillator which meets or exceeds the performance requirements for ITU and ETSI Type I Slave clocks.

The Type 1 Clock module reads measurement data from the Input modules, provides frequency control of the oscillator through DDS circuitry, and generates reference signals used by the Input and Output modules. For more information, see

Type 1 Clock Module, on page 148.

Communications Module

The Communications module serves as the user interface to the SSU-2000. The module command interface supports three EIA-232-C connections and one Ethernet interface for communication with the SSU-2000 system. This module also logs the unit events into non-volatile memory for inspection at a later date and reports alarms as they occur. For more information, see Communications Module, on page 152.

Stratum 3E Clock Module

, on page 144.

Input Modules

1-Port and 3-Port DS1/E1 Input Modules

The DS1 and E1 Input modules are available with both 1-Port and 3-Port configurations. These modules receive signals and perform phase measurement comparisons with the Clock modules that are installed in the SSU-2000. The Clock modules use this information to phase and frequency lock to the incoming signal. The data may also be used for monitoring the frequency of incoming signals.

The DS1 and E1 Input modules accept the following signals: sine or square wave (with frequency of 1, 1.544, 2.048, 5 or 10 MHz) or framed communications type DS1 or E1. If the input signal is a communications type, the module monitors the following errors:

 Alarm Indication Signaling (AIS)  Bipolar Violations (BPV)  Cyclic Redundancy Check (CRC)  Loss of Signal (LOS)  Out Of Frame (OOF)

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The module also extracts Synchronization Status Messages (SSM) from incoming data. For more information, see 1-Port and 3-Port E1 Input Modules, on page 160, and 1-Port and 3-Port DS1 Input Modules, on page 170.

GPS Input Module

The GPS Input module is a one-port card that can only be installed in the SSU-200 0 main shelf. The module is used to correct the frequency of the oscillator on the Clock module. It monitors and reports the status and performance of the module and radio signals that it receives. See GPS Input Module, on page 180, for more information.

You must install this module in slot A3 or A5; the antenna connectors J6 and J7 on the rear panel are connected to these slots, respectively.

Composite Clock Input Module

The Composite Clock Input module conditions a composite clock input signal that is used to control the frequency of the Clock modules. For more information, see

Composite Clock Input Module, on page 184.

When the SSU-2000 is in the Subtending mode, the module also produces a 4 kHz synchronization signal that determines the phase of the composite clock signals generated by Composite Clock Output modules. This signal ensures that the phase of the composite clock output signals follows the phase of the composite clock input reference signal.

Japanese Sine Input Module

The J/SW Input module accepts up to three input signals of either 1.544 MHz or

6.312 MHz and performs phase measurement comparisons (at a sampling rate of 40 Hz) with the Clock modules. The Clock modules use this information to phase and frequency lock to the incoming signal. The data can also be used for monitoring the frequency of incoming signals.

For more information on this module, see Japanese Sine Wave Input Module, on page 187.

Japanese Composite Clock Input Module

The J/CC Input module conditions a composite clock input signal that is used to control the frequency of the Clock modules. For more information, see Japanese

Composite Clock Input Module, on page 194.

If the Input module is provisioned to receive an input with a 400 Hz component and the 400 Hz is available on the input signal, the JCC4 outputs are aligned to the 400 Hz. When the SSU-2000 is in the Subtending mode, it also produces a 4 kHz synchronization signal that determines the phase of the composite clock signals generated by Japanese Composite Clock Output modules. This signal ensures that the phase of the composite clock output signal follows the phase of the composite clock input reference signal.

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SSU-2000 Family of Modules

Output Modules

E1 Output Module

The E1 Output module uses one of three 4 kHz clocks from th e SSU-2000 m ain shelf backplane to generate a phase-locke d signal of 2.0 48 M H z. If the unit is in serted into an SDU-2000 expansion shelf, a fourth 4 kHz clock (D clock) is available. The phaselocked 2.048 MHz signal is used to generate a se t of 20 outpu t signals for distributio n to large networks. See

DS1 Output Module

The DS1 Output module generates a phase-locked signal of 1.544 MHz using one of three 4 kHz clocks from the backplane of the SSU-2000 main shelf. If the module is inserted into the SDU-2000 Synchronization Distribution Unit (expansion shelf), a fourth 4 kHz clock is available. The phase-locked signal generates a set of 20 output signals for distribution to large networks. DS1 Output Module, on page 208, contains detailed information on the module.

Composite Clock Output Module

The Composite Clock (CC) Output module can be installed in the SSU-2000 to generate and monitor CC signals, monitor input reference signals, accept new configuration data, and report status. This module provides 20 signal pairs (TTIP and TRING signal pairs), which are referenced to the selected clock signal. For more information, see Composite Clock Output Module, on page 211.

E1 Output Module

, on page 204, for more information.

E1/2048 kHz Output Module

The E1/2048 kHz Output module can be installed in the SSU-200 0 to genera te and monitor 20 independent E1/2048kHz output signals. If the module is inserted into an SDU-2000 expansion shelf, a fourth 4 kHz clock (D clock) is available. If the input signal PQL drops below a user-specified level, then the outputs can be squelched. For more information, see E1/2048 kHz Output Module, on page 225.

2048 kHz Output Module

The 2048 kHz Output module plugs into selected input/output slots in the SSU-2000 main shelf or one of the output slots on the expansion shelf. The module generates and monitors 20 independent 2048 kHz signals that are referenced to a selected clock module. The 2048 kHz Output module receives a set of three (four if installed in an expansion shelf) 4 kHz clocks from the Clock modules and uses these clocks to develop an 8.192 MHz phase-locked signal. This phase-locked signal is then used to generate 20 sets of 2048 kHz clock outputs. For more information, see 2048

kHz Output Module, on page 233.

RS-422 Output Module

The RS-422 Output module generates 10 balanced square-wave outpu ts (TTIP and TRING signal pairs) and 10 single-ended (Ring) square-wave outputs. Each output can be turned off independently of other port s; relays on ea ch output disconnect the driver output from the output pins. A squelch feature turns off selected ports when the input signal falls below predetermined quality levels. See RS-422 Output

Module, on page 239.

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SSU-2000 Family of Modules

Japanese Composite Clock Output Module

The J/CC Output module generates 20 non-summable signal pairs (TTIP and TRING signal pairs). Each output is a transformer-coupled symmetrical pair. Each output pair can be turned off independently of other channels. These outputs are independently configurable for phase delay from 0 to 3.4 μs in 8 steps.

In subtending mode, the Output module’s signals are byte and polarity phase aligned with the 4 kHz clock signal from the Japanese Composite Clock Input module. This 4 kHz clock signal ensures that the phase of the composite clock output signal follows the phase of the composite clock input reference signal. See

Japanese Sine Wave Output Module, on page 219 for more information.

Japanese Sine Wave Output Module

The J/SW Output module uses one of three 4 kHz clocks from the SSU-2000 main chassis backplane to generate a phase-locked reference signal for the synchronized clock output signals. The phase-locked signal is used to generate 20 software selectable outputs of either 6.312 MHz or 1.544 MHz for distribution to large networks. See Japanese Sine Wave Output Module, on page 219 for more information.

Line Re-timing Unit (LRU)

Symmetricom offers two Line Re-timing modules for the SSU-2000: one for DS1 signals and one for E1 signals. The LRU is comprised of a Line Re-timing module (LRM) and a Cut-Through Assembly (CTA). The DS1 LRU is available in both a two-port (dual) and four-port (quad) version. The E1 LRU is available in a four-port (quad) version. For more information, see DS1 Line Retiming Unit (LRU), on page 245 and E1 Line Re-timing Unit, on page 258.

The DS1 LRU inserts DS1 signals on both sides of a DSX-1 panel in a Central Office. Side 1 of the DS1 re-timer provides “3R” (Re-shape, Re-amplify, and Re-time) for the DS1 signal to a client Network Element. When the LRU receives a DS1 data stream, it re-times the data with the transmit clock signal. The clock signal is inserted into the DS1 line route between two DS1 path-terminating elements. Side one is the direction in which timing is applied. Side 1 contains the DS1 line performance reporting and AIS generator. AIS is not generated when the port is set to Unused/Off. Side 2 provides “2R”, which Re-shapes and Re-amplifies (regenerates) the DS1 signal from the client Network Element. Side 2 does not provide performance monitoring or AIS generation.

The E1 LRU provides four independent retimed lines (signals) and automatically detects framing, and can be provisioned for AMI or HDB3 codes. The LRM inserts E1 signals on both sides of a system connectivity panel in a Central Office . Side 1 of the E1 re-timer provides “3R” (Re-shape, Re-amplify, and Re-time) for the E1 signal to a client Network Element.

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SSU-2000 Family of Modules

When the LRM receives an E1 data stream, it re-times the data with the transmit clock signal. The clock signal is inserted into the E1 line route between two E1 path-terminating elements. Side 1 is the direction in which timing is applied, and contains the E1 line performance reporting and AIS generator. AIS is not generated when the port is set to Unused/Off. Side 2 provides “2R”, which Re-shapes and Re-amplifies (regenerates) the E1 signal from the client Network Element. Side 2 does not provide performance monitoring or AIS generation.

Configuring Redundant Output Modules

For

an A/B pair of Output modules (in a redundancy configuration), it is possible to connect all of the outputs of Module B to the corresponding outputs of Module A, providing 1:1 output protection (1:1 redundancy). input/output connectors

This requires the use of a user-installed Output Summer connector. Using this connector, you can configure Output pairs I/O-2–I/O-3, I/O-4–I/O-5, I/O-6–I/O-7, and I/O-8–I/O-9 in redundant mode. See Installing Output Summer Adapters, on page 68, for more information on making redundant connections.

Figure 1-10

shows the SSU-2000

Figure 1-10. SSU-2000 Input/Output Connectors

46 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007

Input and Output Adapter Panels

All Input and Output module signals connect to/from the rear panel of the main shelf (and expansion shelf) using 50-pin SCSI II type connectors.

To adapt signals from 50-pin SCSI connectors to conventional BNC (Balun) and 9-pin D-sub connections, you use Input and Output Adapter panels (I/O Adapter panels) that install in the rack either directly above or directly below the main or one of four possible expansion shelf.

All SSU-2000 connections are made on the rear of the Adapter panels; the connections to the telecommunications system are on the front of the Adapter panels.

The following adapter panels are available for use with the SSU-2000 Input and Output modules:

 Input I/O adapter for 3-port Input modules (DS1 or E1) – one adapter panel is

required for each 3-port Input module used in the system.

Chapter 1 Product Overview

Input and Output Adapter Panels

 Input I/O adapter for 1-port Input modules (DS1 or E1) – one adapter panel

serves up to four 1-port Input modules.

 Output I/O adapter for Output modules (75 ohm Balun Outputs)

– one adapter panel accommodates one output mo dule (non-redundant) or one p air of redundant modules

 Output I/O adapter for Output modules (D9 outputs) – one adapter panel

accommodates one Output module (non-redundant) or one pair of redundant modules.

 Output I/O adapter for Output modules (wire-wrap) – the 80-channel adapter

panel accommodates four Output modules (non-redundant) or two pairs of Output modules. The 100-channel adapter panel accommodates five Output modules (non-redundant) or two pairs of redundant modules.

These adapter panels are shown in Figure 1-11 and described in greater detail in

Chapter 7, Input Module Reference Data, and Chapter 8, Output Module Reference Data.

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Chapter 1 Product Overview

Input and Output Adapter Panels

I/O Adapter for 3-Port Input Module

I/O Adapter for 1-Port Input Module

75 Ohm Balun I/O Adapter for Output Module

DE9 I/O Adapter for Output Module

100-Channel High-Density Wire-Wrap I/O Adapter for Output Module

80-Channel High-Density Wire-Wrap I/O Adapter for Output Module

Figure 1-11. I/O Adapter Panels for Input and Output Modules

48 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007

Communications Protocol

This section summarizes the methods of controlling the SSU-2000 a nd the available software features, depending upon the system functionality required.

Software Interface

There are four methods of controlling the SSU-2000. The control interfaces available are:

TL1 – Transaction Language One

TL1 provides command sets to support all operation, administration, maintenance, and provisioning tasks required to maintain and control an SSU-2000 system. These tasks include configuring and provisioning security, monitoring system performance, configuring hardware, locating and handling faults, and performing equipment diagnosis and testing. Refer to the SSU-2000 Technical Reference for more information.

Chapter 1 Product Overview

Communications Protocol

ICS – Interactive Command Set

ICS also provides command sets to support all operation, administration, maintenance, and provisioning tasks required to maintain and contro l an SSU-2000 system from a terminal connected to one of the SSU-2000 RS-232 serial port s. ICS commands are designed in a more readable interface for users with an instructional help facility. Refer to the SSU-2000 Technical Reference for more information.

NTP – Network Time Protocol

The Network Time Protocol (NTP) is used to synchronize the time of a computer client or server to another server or reference time source, such as a GPS receiver or local timing source.

The SSU-2000 implements the NTP v.3 (RFC 1305) version. It can run as a server application and a client application. In addition, a broadcast mode may be implemented as either a server or client. The NTP server always runs and the client and broadcast modes are enabled independently by assignment of addresses and setting of timers. Refer to the SSU-2000 Technical Reference for more information.

SNMP – Simple Network Management Protocol

The SSU-2000 offers two versions of SNMP: v2 and v3. SNMP v3 software offers additional security with authentication and privacy parameters. The security feature allows secure transactions to provide protection against modification of information, masquerade, and message stream modification.

Simple Network Management Protocol (SNMP) is based on a client-server query-response mode. A manager is the client generating the queries, while an agent is the server generating the responses.

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Communications Protocol

The SSU-2000 SNMP is an SNMP agent that requires Ethernet connectivity. If SNMP is present, port 161 becomes the port of standard SNMP interactive communications, while port 162 becomes the trap port. Since the SSU-2000 SNMP supports all existing functions, full system control of the SSU-2000 is maintained through SNMP.

The SSU-2000 implements an SNMP agent. A Management Information Base (MIB) browser or the SNMP Manager is used to access, retrieve, and query information defined by the MIB.

All reports, queries, autonomous messages, control, provisioning, and administration (except for communication port parameters, Set User ID/Password, Set IP assignments, Reset connection, and SNMP community settings) are available through SNMP. Refer to

Software Versions

There are six different versions of software available for the SSU-2000, as in dicated in Table 1-2. The functionality and commands that are available vary from one version of software version to the next, depending on the specific features of the software package and are described in the SSU-2000 Technical Reference.

the SSU-2000 Technical Reference

for more information.

Table 1-2. Versions of Software for the Communications Module

Version TL1 ICS NTP SNMP v2 SNMP v3

Basic System Load X X Basic w/NTP Support X X X Basic w/SNMP v2 Support X X X Basic w/SNMP v2 and NTP SupportXXXX Basic w/SNMP v3 Support X X X X Basic w/SNMP v3 and NTP SupportXXXX X

Basic System Load

The basic system load includes all TL1 and ICS support software. TL1 provides command sets to support all operation, administration, main tenance, and provisioning tasks required to maintain and control an SSU-2000e system. These tasks include configuring and provisioning security, monitoring system performance, configuring hardware, locating and handling fault s, and performing equipment diagnosis and testing. Refer to

the SSU-2000e Technical Reference

for more information.

50 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007

ICS also provides command sets to support all operation, administration, maintenance, and provisioning tasks required to maintain and control an SSU-2000e system from a terminal connected to one of the serial ports. ICS commands are designed in a more readable interface for users, and includes an instructional help facility. Refer to the SSU-2000 Technical Reference for more information.

Graphical User Interface

Symmetricom’s SynCraft application is a software interface program that is available to provide local or remote monitoring and configuration functionality in a Microsoft Windows graphical user interface. Contact your Symmetricom sales representative for more information on the SynCraft Graphical User Interface, part number 14113245-000-0.

Overview of SSU-2000 Operation

Chapter 1 Product Overview

Overview of SSU-2000 Operation

After initial installation and configuration is completed, the SSU-2000 is capable of unattended operation. After power-up, where the external powe r supplies are turned on so that they supply power to the main shelf, the SSU-2000 performs a self-diagnostic test routine and properly initializes the hardware. Any active Alarms are time tagged and reported as Events. All Events are time t agged and the last 500 Events are stored in NVRAM. All Events can be remotely accessed and cleared by a user with the appropriate security level. Several optional levels of password protection are available for system protection as described in Overview of the

SSU-2000 Security System, on page 93.

After the internal oscillators on any installed Clock modules have warmed up, the SSU-2000 enters the ACQUIRE mode to phase lock the oscillators to the external references. After the SSU-2000 reaches the LOCKED mode on at least one of the Clock modules, any change of state is reported as an Event.

Synchronization Status Messages (SSMs)

The SSU-2000 supports input and output SSMs. SSMs provide a method for providing clock quality information to any equipment that uses synchronization inputs.

The SSU-2000 handles SSMs in accordance with T1X1.3 TR33, T1.101-1999, GR-253, 379-CORE, and ITU-T G.781.

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SDU-2000 Synchronization Distribution Unit

Indicators and Controls

All modules installed in the SSU-2000 main shelf and the SDU-2000 expansion shelf contain status indicator lamps for displaying status. The LED indicators for each module are described in Chapter 6, Clock and Communications Module

Reference Data, Chapter 7, Input Module Reference Data, and Chapter 8, Output Module Reference Data. In addition, the Communications module collects status

information from all installed modules, sets the alarm relays, and sends communications status alerting users of any Events that exceed alarm thresholds.

SDU-2000 Synchronization Distribution Unit

Up to four SDU-2000 Synchronization Distribution Units (expansion shelves) can be attached to the SSU-2000 for output expansion (Figure 1-12 and Figure 1-13). Each expansion shelf contains two Buffer modules and 14 output modules (can be a combination of output modules). Four expansion shelves can hold up to 56 Output modules capable of generating an additional 1120 synchronized clock outputs for system distribution. Each expansion shelf is connected to the main shelf with redundant clock cables to protect against cable faults.

Figure 1-12. Front View of the SDU-2000 Expansion Shelf

The SDU-2000 Expansion shelf is designed to be compatible with international environmental, safety and electromagnetic compliance (EMC) standards for –48/60 VDC powered telecommunication transmission equipment installed in telecommunication centers with inside telecom signal connections. The farthest Expansion shelf may be located up to 200 feet (61 meters) from the SSU-2000 main shelf.

52 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007

Figure 1-13. Rear View of the SDU-2000 Expansion Shelf

SDU-2000 Synchronization Distribution Unit

Chapter 1 Product Overview

Functional Overview

Figure 1-14 shows a simplified functional block diagram of the SDU-2000

Expansion shelf. The SDU-2000 interfaces with the SSU-2000 main shelf in two-way communications through the SSU/SDU interface cables and receives synchronization clocks that are buffered and used to produce the differential output signals at the connector panel, as shown in Figure 1-14. A second interface cable supplies the SDU-2000 Expansion shelf with a backup clock (D Clock) which can sustain the expansion shelf even if the main cable is accidently disconnected. An address switch on the connector panel of the expansion shelf identifies each additional shelf to the main shelf for status and firmware downloading purposes.

Each expansion shelf extends the expansion bus and D clock to the next shelf in the daisy chain. The last expansion shelf uses a set of termination plugs on the Expansion Bus Connector and the Backup-Clock Connector.

Each expansion shelf can support any combination of up to ten 2048 kHz, Composite Clock (CC), or framed 2048 kbit/s (E1) or DS1 modules, each capable of generating 20 output signals for distribution to large networks. Each Output module generates a phase-locked signal of 1.544 Mbps (DS1) or 2048 kbit/s (E1) using one of three 4 KHz clocks supplied by the clock oscillators in the SSU-2000 main shelf. The phase locked clock signal is buffered and summed with a companion Output module in redundant pairs to generate a set of 20 independent output clock signals for distribution to large networks.

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SDU-2000 Synchronization Distribution Unit

Output modules are available to support the following formats:

 2048 Kbit/s (E1)  DS1, SF (D4) and ESF  2048 kHz  Composite Clock (64/8 kHz)  RS-422  Japanese Composite Clock  Japanese Sine Wave  DS1/E1 Line Re-Timing

Expansion Shelf Features

The SDU-2000 expansion shelf consists of the following major components.

 Expansion shelf  One or two Buffer modules; where two provide a more robust system  Up to 14 Output modules, which can be a combination of Output module types  Connector panel with five groups of output connectors, SDU interface connector

group, dual power connectors, dual frame ground connectors, and a shelf address switch.

Clock Source

The clock inputs for the first SDU-2000 expan sion shelf in an SSU-2000 system are supplied by the A and B Clock modules in the main shelf. A multi-pin connector on the rear panel of the SSU-2000 (labeled J8 SDU Interface) provides the reference signals from the main shelf Clock modules for use by the SDU-2000 expansion shelves. The clock source is usually connected to J15.

SDU Backup Clock

For redundancy, a backup clock is supplied to each expansion shelf to allow it to continue operating if the main expansion bus (cable) is accidently disconnected or dislodged. The SSU-2000 provides a backup clock (Clock D) to the SDU Backup Clock terminal, labeled J16. Using a Tee-connector, Connector J16 feeds an additional SDU-2000 shelf.

When installing an expansion shelf, move the clock terminator from J9 on the SSU-2000 or connector J16 from a previous SDU-2000 expansion shelf, and inst all the terminator on J16 of the last expansion shelf in the daisy chain.

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Chapter 1 Product Overview

Figure 1-14. SDU-2000 Block Diagram

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SDU-2000 Synchronization Distribution Unit

Setting the Expansion Shelf Address

Each SDU-2000 Expansion shelf must be correctly configured for its position in the daisy chain. The main shelf’s address is 1. The SDU shelf address selector is numbered from two to five. Set the first expansion shelf address to 2. Set the address on additional shelves sequentially, as shown in Table 1-3.

Table 1-3. Expansion Shelf Addresses

Shelf Address

Main Shelf 1 Expansion Shelf 1 2 Expansion Shelf 2 3 Expansion Shelf 3 4 Expansion Shelf 4 5

Buffered Clocks

The signals that are provided by the main shelf Clock modules to the Buffer modules in the expansion shelf are isolated versions of the signals used by the Output modules in the main shelf. This prevents the expansion shelf and its cabling from affecting the outputs of the main shelf.

SDU Module Features

The SDU-2000 expansion shelf supports all Output modules available for the main shelf, and Buffer modules. The SDU-2000 expansion shelf can support up to 14 Output modules.

 One or two Buffer modules, assigned to slots A15 and A16  One to 14 Output modules; a mixture of Output module types, where each group

of two modules must be identical

The last two module slots in the expansion shelf, labeled A15 and A16, contain the Buffer modules that buffer the corresponding Clock and Communications modules in the main shelf. The buffered signals from these modules are distributed through the motherboard to the Output modules.

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Chapter 1 Product Overview

Other common module features include:

 Any module can be inserted or removed while power is applied without affecting

the operation of other modules in the system

 All modules are individually fused to protect the system in case of a short circuit

on any one module

 The SSU-2000 and the SDU-2000 share common Output modules  All modules have front panel LED status indicators  All modules are equipped with ejector tabs for ease of installation and removal  All modules are secured in place with captive screws to provide module security

and reduce the occurrence of unauthorized removal

 All modules, except the Buffer module, have an integrated CPU with firmware

and are software configurable through the SSU-2000. See Configuring a

Conventional SSU/TSG System, on page 270, for additional information

 Each module slot has two associated hybrid DIN connectors on the chassis

backplane. The hybrid contacts of these connectors are used for Power, Logic Ground, and Frame Ground connections

 Each module slot has three pins on each hybrid DIN connector that allows the

system to detect module removal and insertion. This capability provides plug-and-play capability.

Connector Panel Features

The expansion shelf provides connections for external power, grounding, clock inputs, and output connections. All modules plug in from the front of the shelf.

Controls and Indicators

All modules installed in the SDU-2000 expansion shelf contain LED status indicators for displaying status. Any faults from the inst alled modules are se nt to the SSU-2000 Communications module through the buffer modules; the appropriate alarm relays are set and communication status is sent to alert users of any events that exceed specified alarm thresholds.

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58 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007

Chapter 2 Installing the SSU-2000

This chapter provides guidelines and procedures for installing and powering up the SSU-2000 Synchronization Supply Unit.

In This Chapter

 Unpacking and Inspecting the Shelf  Preliminary Procedures  Rack Mounting the SSU-2000  Making Ground and Power Connections  Making Signal Connections  Making Alarm Connections  Connecting Antennas  Connecting an SDU-2000 Expansion Shelf  Handling Modules  Installation Checklist  Powering Up the SSU-2000  Normal System Indications During Turn-Up  After Turn Up

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Chapter 2 Installing the SSU-2000

Unpacking and Inspecting the Shelf

The SSU-2000 is packaged to protect it from normal shock, vibration and handling damage. Care should be taken during unpackin g and installa tion to avoid damaging the unprotected unit.

Caution: To avoid damage, use proper static control precautions when handling modules! Protect the equipment against ESD (Electrostatic Discharge) by using a grounded protective wrist strap and normal equipment grounding.

1. Unpack all equipment carefully and check it against the purchase order.

2. Inspect the equipment for shipping damage, including bent or loose hardware, broken connectors, or other visible defects. Notify Symmetricom and the carrier who delivered the equipment if you suspect that it was damaged in transit.

If any items are missing, contact Symmetricom Global Services.

Recommendation: Keep all packaging materials in the event the shelf or components must be returned or shippe d to another loca tion.

Preliminary Procedures

Make sure that the following preparations are in place before installation.

 Ensure that standard installation tools and materials are available, see

Installation Tools and Materials, on page 61.

 The installation site is secured:

– Access to the location can only be gained by service personnel or users

who have been instructed about the reasons for the restrictions applied to the location and about any precautions that shall be taken; and

– Access is through use of a tool or lock and key, or other means of security ,

and is controlled by the authority responsible for the location



Ensure that the system location does not cause electromagnetic interference with other equipment in the area, see

Considerations, on page 61.

Electromagnetic Interference (EMI)

 Ensure that adequate ventilation space is available in the rack or equipment

cabinet to safely operate the shelf, see Ventilation Considerations, on page 62.

 The SSU-2000 is suitable for installation o ver concrete or othe r non -combust ible

surfaces only.

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Chapter 2 Installing the SSU-2000

 Ensure that the mounting rack or equipment cabinet is properly grounded and

Preliminary Procedures

has power available, see Making Ground Connections, on page 65.

Warning: Before beginning the SSU-200 0 installation, be sure to remove the A-BUS and B-BUS fuses on the rear panel of the shelf. The unit is not equipped with a power on/off switch and both fuses must be removed to ensure the shelf is not accidentally powered up.

Caution: To avoid electrostatic discharge (ESD) damage to equipment, follow the ESD precautions as listed in this guide.

Recommendation: Symmetricom recommends that you follow all applicable local building electrical codes when installing the SSU-2000.

Installation Tools and Materials

The following required standard tools and materials (not supplied) are required for installing the SSU-2000:

 Standard tool kit  Cable ties or acceptable cable clamps  16 AWG (minimum) wire for –48V, RTN, and frame ground  18 AWG wire for connecting office alarms  22 AWG shielded twisted pair wire-wrap cable (Amp #640433-7 or equivalent)  Wire-wrap tool



No. 10 screws, flat washers, and locking washers for mounting the equ ipment rack

 Digital Voltmeter  Straight-through RS-232 cable  Laptop or PC with a terminal emulation program such as HyperTerminal or

ProComm Plus

Electromagnetic Interference (EMI) Considerations

Electromagnetic interference (EMI) from one instrument can adversely affect the operation of nearby equipment. To prevent the SSU-2000 from interfering with other equipment, it must be installed and operated as described in the following paragraphs.

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Rack Mounting the SSU-2000

All cables connected to the SSU-2000 should be shielded with metal connector shells. The connectors on the rear panel of the shelf are shielded, with the shields connected to frame ground. Follow local procedures for shield grounding. The screws on all cables must be securely fastened to their corresponding connectors on the rear of the unit. While the unit is in operation, there must be a module or blank panel installed in every slot. Also, the captive screws, located at the top and bottom of the module panel, must be properly secured.

Caution: To maintain EMC compliance, use only properly shielded cabling on all telecom signal wiring, including I/O, clocks, and Ethernet connections. Ensure that connections are appropriately grounded.

Ventilation Considerations

For proper ventilation, there should be at least 2 RU (3 inches, 7.6 cm) of free space above and below the shelf.

Caution: To avoid excessive heat build-up resulting in equipment damage, provide proper ventilation and cooling of the equipment.

Rack Mounting the SSU-2000

The SSU-2000 shelf, when installed, occupies 10.5 in (26.7 cm) of vertical rack space, has a depth of 12 in (30.5 cm), and a width of 19 in (48.3 cm). When installing more than one SSU-2000, each unit must have at least one inch (2.5 cm) of clearance above and below to ensure proper cooling. There should be at least three inches (7.6 cm) of free space below the bottom shelf. It is recommended that at least one I/O adapter panel be inserted between each unit.

Caution: Failure to provide proper ventilation can result in excessive heat build-up resulting in equipment damage. Symmetr icom suggests that you insert an I/O adapter panel between shelves. See

2-1

SSU-2000 Shelf

Figure

The shelves mount flush to the rack or at distances of either 2 inches (5.1 cm) or 5 inches (12.7 cm) from the front of the rack. An SSU-2000 rack mounting diagram is shown in Figure 2-1.

1. Attach a mounting bracket to each side of the shelf by aligning two columns (three holes per column) of the bracket with the holes on the side of the shelf.

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Rack Mounting the SSU-2000

Use suitable screws for attaching the mounting bracket. Ensure that both brackets are attached at equal distances from the front of the shelf.

2. Mount the instrument to the front of the rack rails with the appropriate number of screws and washers for the rack.

Figure 2-1. Shelf and I/O Adapter Rack Mounting

3. If you are not using Expansion shelves, verify that the Bus Termination Assembly is inserted into J9 on the rear panel of the main shelf.

Recommendation: When possible, install the shelf at eye level to aid in viewing and connecting cables.

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Chapter 2 Installing the SSU-2000

Making Ground and Power Connections

I/O Adapter Panels

The procedure for attaching the four types of I/O adapter panels to the rack are identical. The location of the I/O adapter panels is limited only by the length of the interconnecting cable. Input adapter cables are restricted to one meter. Output adapter cables are available in lengths from one to two meters in increments of

0.1 meter; see Chapter 9, Hardware Configuration Guide, for part numbers.

1. The I/O adapter panels may be mounted flush to the top or bottom of the shelf. Use suitable screws for attaching the I/O adapter panel. Ensure that both brackets are attached at equal distances from the front of the unit.

2. Mount the panels to the front of the rack rails with four screws and washers.

Recommendation: Although I/O adapters may be located as necessary, Symmetricom recommends that you mount the Input I/O adapter panels above the shelf to accommodate the shorter cable length; mount the Output I/O adapter panels below the shelf.

Making Ground and Power Connections

The SSU-2000 shelf has redundant -48VDC power input connections labeled A-BUS and B-BUS. The A-BUS connection is a 2-position #6 terminal block in the upper left corner of the rear panel, and the B-BUS connection is a 2-position #6 terminal block in the upper right corner of the rear panel. The terminal positions ar e labeled –48V and RTN. The –48V side of each bus is fused with a 5 Amp fuse. Th e –48V power inputs are DC Isolated from frame ground and logic ground. Both the A-BUS and B-BUS are fed to the individual module slots via the backplane. Refer to

Figure 2-4 for a view of the SSU-2000 rear panel.

Caution: For continued fire protection, replace fuse with specified type and rating. Fuse: GMT-5 (5A @ 60vDC). This unit must be grounded. Refer all servicing to qualified personnel.

Caution: To avoid equipment damage, ensure that the power terminal covers are installed after connecting the –48V power.

Caution: To provide proper I/O connector grounding, ensure that when removing or installing Summer Output connectors that all screws are tightened securely.

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Making Ground and Power Connections

Chapter 2 Installing the SSU-2000

Making Ground Connections

After the SSU-2000 is installed in a suit able rack, connect the shelf to a proper earth ground.

1. Run a cable from the frame ground (FG) lug to earth ground. Keep this cable as short as possible. Frame ground connections are made

using two #8-32 studs labeled FG on each side of the lower rear panel. There are also provisions for making logic ground connections when required by a specific customers installation. These connections are labeled LG and are located next to the FG studs and are strapped together with a jumper , as shown in Figure 2-2. The jumper strap can be removed to isolate the frame and logic grounds. Logic ground is AC bypassed to frame ground by capacitor C1 on the backplane.

Note: To isolate frame ground from logic ground, remove the two jumpers connecting Frame Ground to Logic Ground. Once the connections to LG have been opened, secure the jumpers to the rear panel by tightening the FG screws. If desired, either of the LG terminals may be used to connect a separate Logic Ground ca ble.

2. Using a digital voltmeter, measure between the ground and chassis and verify that no voltage exists between them.

Figure 2-2. Frame and Logic Ground Jumpers

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Chapter 2 Installing the SSU-2000

Making Signal Connections

Connecting Power

1. Locate the power terminal blocks on the rear panel, as shown in Figure 2-3.

2. Remove both 5 A fuses. You will replace them at the end of the installation procedure.

3. Using 16 AWG (minimum) stranded wire, connect primary power to the A-BUS screws and the secondary power to the B-BUS screws. Symmetricom recommends that you use a #6 spade lug termination for each power lead.

Figure 2-3. Power Te rminal Blocks

Making Signal Connections

Making I/O Connections

The SSU-2000 shelf has I/O interface connections for connecting the SSU-2000 to the corresponding I/O adapter panels. Refer to Chapter 7, Input Module Reference

Data, and Chapter 8, Output Module Reference Data, for information regarding the

different type I/O adapter panels available and the associated cables used to connect the SSU-2000 to the I/O adapter panels. Figu re 2-4 shows the rear p anel of the SSU-2000.

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Chapter 2 Installing the SSU-2000

Making Signal Connections

All I/O connections are made through the nine 50-Pin Micro-D female connectors, J10 through J18. Each connector is associated with a specific chassis slot. Table

2-1 lists the relationship between the I/O slot and the rear panel connector.

Connectors J10 through J18 are labeled I/O-1 through I/O-9. The signal connections on these I/O connectors are set up in differential pairs as Tip and Ring connections.

Figure 2-4. SSU-2000 Rear Panel

Table 2-1. I/O Module Slot to I/O Connector Relationship

Label

(Name)

Chassis Slot I/O Connector

I/O-1 A3 J10 I/O-2 A4 J11 I/O-3 A5 J12 I/O-4 A6 J13 I/O-5 A7 J14 I/O-6 A8 J15 I/O-7 A9 J16 I/O-8 A10 J17 I/O-9 A11 J18

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Chapter 2 Installing the SSU-2000

Making Signal Connections

Installing Output Summer Adapters

To create

an A/B pair of Output modules in a redundancy configuration, you need to install Output Summer adapters (part number 22013070-000-0) on the corresponding outputs as shown in

Figure 2-5

. All Module A outputs are summed with the corresponding outputs of Module B, providing 1:1 output protection (1:1 redundancy). Output pairs in slots A4/A5, A6/A7, A8/A9, and A10/A11 are available for configuration in redundant mode using Output Summer connectors. The pinout of the Output Summer adapter is the same as the I/O interface connectors (see Chapter 7 of the SSU-2000 Technical Reference)

You can install the Output Summer adapters before you place the SSU-2000 in-service or after it begins to generate outputs.

Installing Output Summer Adapters on an Out-of-Service SSU-2000

To install the Output Summer adapter on an out-of-service SSU-2000:

1. Remove the two retaining screws on each connector that the Output Summer

adapter is to be installed on.

Caution: To avoid possible electrostatic discharge problems after removing an Output Summer adapter, you must replace the screws securing the I/O connectors on the rear panel of the SSU-2000.

2. Install Output Summer adapters on all I/O connector pairs that require

redundancy, see Figure 2-5.

3. Tighten all Output Summer adapters screws securely.

4. Connect 50-pin Micro-D output cables between the I/O Adapter panel and the

Output Summer adapter as required.

Figure 2-5. Installing the Output Summer Adapter

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Making Signal Connections

Installing Output Summer Adapters on an In-Service SSU-2000

If you choose to install Output Summer adapters on an SSU-2000 that is generating outputs, you may experience a LOS alarm and possibly a “Module Removed” alarm. The alarms may occur under the following conditions:

 A LOS alarm will occur if you remove the output cable from the rear panel of the

SSU-2000 and that cable carries timing signals from the associated Output module

 A “Module Removed” alarm will occur if you remove an Output module from the

SSU-2000 shelf in order to place it in a slot appropriate for output summing.

 Alarm conditions downstream from the SSU-2000 and in the SSU-2000 may

result when you attach the Output Summer and the protection scheme is not identical (1 + 1 or 1-for-1) in both Output modules.

 Alarm conditions downstream from the SSU-2000 and in the SSU-2000 may

result due to misalignment of framing bits when you attach the Output Summer.

The alarm conditions remain until the SSU-2000 returns to normal operating conditions.

1. Remove the interconnect cables from the selected module pair. A LOS alarm

occurs for the affected output(s).

2. Remove the two retaining screws on each connector that the Output Summer

adapter is to be installed on.

3. Install the Output Summer Adapter and hand tighten the retaining screws.

4. Provision the affected Output modules using SynCraft or ICS or TL1 commands:

Set the desired options on the Output modules. Restart the affected Output modules ( Save the new user configuration (

RESTART xAy).

SET-SAVE xAy).

5. Install the appropriate interconnect cable to the Output Summer Adapter.

6. Dress the cables as appropriate. You can install the Output Summer Adapters without the risk of alarms in the

following situations:

 You install the Output Summer Adapter to an SSU-2000 that has two in-service

Output modules in the desired paired slot location.

 You install the Output Summer Adapter to an SSU-2000 that has one in-service

Output module in one of the desired paired slot locations and you the n inst all the second Output module in the other slot location.

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Chapter 2 Installing the SSU-2000

Making Signal Connections

To install the Output Summer adapter on an in-service SSU-2000:

1. Remove the interconnect cables from the selected module pair. A LOS alarm

occurs for the affected output(s).

2. Remove the two retaining screws on each connector that the Output Summer

adapter is to be installed on.

3. Install the Output Summer Adapter and hand tighten the retaining screws.

4. Install the second Output module in the appropriate slot and tighten the retaining

screws.

5. Provision the affected Output modules using SynCraft or ICS or TL1 commands:

Set the desired options on the Output modules. Restart the affected Output modules ( Save the new user configuration (

RESTART xAy).

SET-SAVE xAy).

6. Install the appropriate interconnect cable to the Output Summer Adapter.

7. Dress the cables as appropriate.

Making Communication Connections

The rear panel of the SSU-2000 shelf has connections for three communications interfaces, two EIA-232 Serial Port connections, and one Ethernet connection. These ports allow communication between the SSU-2000 and a terminal or PC. Each port is configured independently.

Note: A third EIA-232 serial port may be connected to the Communications module. Refer to Communications Modu le, on p age 152, for more information.

Refer to Table 2-2 for the serial and Ethernet communications port assignments.

Table 2-2. Communications Port Assignments

Port # Function Protocol

Serial Ports (EIA-232)

A (J4) User-selectable as either an ICS or a TL1 in terface. The

port defaults to ICS upon initialization

B (J5) User-selectable as either an ICS or a TL1 in terface. The

port defaults to ICS upon initialization

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ICS (Default), TL1

Table 2-2. Communications Port Assignments (Continued)

Port # Function Protocol

Chapter 2 Installing the SSU-2000

Making Signal Connections

Local (Comms Module)

23 User-selectable as either an ICS or a TL1 interface. Th e

123 This port is designated for NTP only NTP 161 This port is designated for SNMP Interactive SNMP Interactive 162 This port is designated for SNMP Trap transmission SNMP Trap 2000 This port is designated for TL1 only TL1

User-selectable as either an ICS or a TL1 interface. Th e port defaults to ICS upon initialization

Ethernet Ports (Telnet)

port defaults to ICS upon initialization

ICS (Default), TL1

EIA232 Serial Port Connections

Both RS-232 serial port connections are made through filtered DE9S female connectors on the rear panel. These ports allow connection to a terminal or PC for remote monitoring and control. One is on connector J4 and is labeled Serial Port A, the other is on connector J5 and is labeled Serial Port B. Wh en conn ecting to th ese ports, use a shielded direct-connect cable with the shield connected to pin 1.

Serial Port DTE/DCE Switch

The serial port DTE/DCE switch is located on the lower right side of the rear panel, as shown in Figure 2-6. Each port (A and B) may be configured as either DCE (default, connection to PC) or DTE (connection to modem). The right switch controls port A and the left switch controls port B.

DTE

DCE

Figure 2-6. DTE/DCE Slide Switch

The default EIA-232 settings for both serial ports are 9600 baud, no parity, 8 data bits, 1 stop bit, echo on, ASCII mode, and handshaking disabled. To change these settings, connect the SSU-2000 to a terminal device or PC using a serial communications program protocol. See Communicating by Serial Port, on page 91, for more information.

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Making Signal Connections

Table 2-3 shows the EIA-232 Connector pin assignments for the SSU-2000 DE9

communications connectors.

Table 2-3. EIA-232 Connector Pin Assignments

Signal Pin Pin Signal

FG Shield 5 Logic

Return

94DSR CTS 8 3 TXD RTS 7 2 RXD DTR 6 1 DCD

Connector

Orientation DE9S

Making Ethernet Connections

The Ethernet 10-Base-T connection is located on the rear panel connector J3, which is a shielded RJ45 receptacle labeled Ethernet 10-Base-T. See

Communicating by Ethernet, on page 92, for more information on connecting and

using the Ethernet port.

Local Oscillator Outputs

The SSU-2000 has two Local Oscillator (LO) connections J1 and J2 on the rear panel. The signals on these connectors are disabled, and the connectors are capped to minimize radiated emissions. Removing these caps causes the SSU-2000 shelf to exceed EMC specifications.

Remote Reset

The SSU-2000 shelf has a remote reset input which can be used to re motely initiate a system reset if you cannot communicate with the shelf using the serial or Ethernet ports. The remote reset connections are made via connector J19, which is a BNO connector labeled REMOTE RESET. A contact closure across the pins for three to five seconds resets the Communications module; pressing the Reset button on the Communications module performs the same function (see Resetting the Module, on page 157).

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Making Alarm Connections

The SSU-2000 has two alarm terminal blocks located on the rear panel for attaching external circuits to the SSU-2000, and are shown in Figure 2-7. Both blocks are nine-position, #6 filtered terminal blocks. The local connections are made on TB1 and the remote connections are made on TB2. The terminal blocks are labeled Alarm Closures, Local and Remote. The connections are labeled NO (normally open), COM (common or wiper) and NC (normally closed) for each of the alarm categories CRITICAL, MAJOR and MINOR.

Chapter 2 Installing the SSU-2000

Making Alarm Connections

Figure 2-7. Alarm Terminal Blocks

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Chapter 2 Installing the SSU-2000

Making Alarm Connections

Alarm Relays

The Communications module contains six Form C relays used for alarm reporting. The relays provide contact closures for Local Critical, Local Major, Local Minor, Remote Critical, Remote Major, and Remote Minor alarm conditions. Switching capacity is up to 1 ampere, with a voltage up to 72 VDC. When the module is installed, all relays are in the “no alarm” condition (corresponding ALARMS LEDs are off). Each Remote/Local relay pair is controlled by the same control bit in the LCA that controls the LEDs. Table 2-4 shows the default state of each relay pair (energized/de-energized), the “no alarm”, and “alarm” connections.

Table 2-4. Alarm Relay Connections

REM/LOC

Pair

CRITICAL Energized: no alarm

De-energized:alarm

MAJOR De-energized: no alarm

Energized: alarm

MINOR De-energized:no alarm

Energized: alarm

Condition

(default shown first)

Connection:

TB1/TB2

COM – NC COM – NO

Perform the following steps to ensure proper alarm connections to the SSU-2000.

1. Remove both fuses from the rear panel.

2. Locate the ALARM terminal blocks connectors labeled MAJOR ALARMS (TB1) and MINOR ALARMS (TB2) on the rear panel.

3. Connect office alarms to the REMOTE and LOCAL terminals with 18 AWG wire.

4. Verify that correct wiring connections have been made.

5. Reinstall both fuses.

Caution: For continued fire protection, replace fuse with specified type and rating. Fuse: GMT-5 (5A @ 60vDC). This unit must be grounded. Refer all servicing to qualified personnel.

Note: In an alarm condition or loss of DC power, the contact between the NO and COM closes and the contact between the NC and COM opens.

74 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007

Connecting Antennas

The SSU-2000 shelf has two antenna connections on the rear panel. The antenna connections are made via isolated TNC connector J6 labeled ANTENNA-A and Isolated TNC connector J7 labeled ANTENNA-B. These TNCs are DC isolated and AC bypassed to frame ground. These connections are used for radio receiver antenna connections only. Refer to the SSU-2000 Technical Reference for installation procedures and additional instructions.

Warning: To avoid serious personal injury or death, exercise caution when working near high voltage lines. In particular:

 Use extreme caution when installing the GPS antenna near,

under, or around high voltage lines.

 Follow local building electrical codes for grounding using the

frame ground lugs integrated with the SSU-2000 shelf.

Connector J6 is wired to slot A3 in the shelf, and Connector J7 is wired to slot A5.

Chapter 2 Installing the SSU-2000

Connecting Antennas

Connecting an SDU-2000 Expansion Shelf

The SSU-2000 Main shelf has two interface connectors to connect an SDU-2000 Expansion shelf. You can connect up to four SDU-2000 shelves in a daisy-chain fashion using the Expansion Interface cable (part number 12013050-xxx-0 and the Backup Clock cable (12013115-xxx-0). These connections are made through connector J8, a DB25S female connector with locking post, labeled SDU INTERFACE, and connector J9, a BNO connector labeled SDU BACKUP CLK. These connectors are on the rear panel of the SSU-2000, and are shown in Figure

2-8. The corresponding connectors on the rear panel of the SDU-2000 are shown in Figure 2-9.

All signals on J8 are in differential pairs; each pair is terminated by installing the Expansion Terminator (part number 12013049-000-0), which has a series 0.001 μF capacitor and 120 Ω resistor. The SDU backup clock signal on connector J9 is a differential pair; it is terminated with 120 Ω using switch S2 on the rear panel.

Caution: To avoid damage to the J9 connector or the BNO tee connector, b e sure to align it s internal pin s with the mating connecto r. The tee connector does not rotate once it is installed. If J9 is damaged, you will have to replace the entire shelf.

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Chapter 2 Installing the SSU-2000

Connecting an SDU-2000 Expansion Shelf

Figure 2-8. SDU Interface (J8) and Backup Clock (J9) Connectors

Figure 2-9. SDU Interface (J17 and J15) and Backup Clock (J16) Connectors

If you are not installing an SDU-2000 Expansion shelf, you must install the Expansion Terminator on J8 on the rear panel. Figure 2-10 shows the SSU-2000 Expansion Terminator.

Figure 2-10. SSU Interface (J8) Expansion Terminator

Install the SDU-2000 Expansion shelf using the procedure described in Rack

Mounting the SSU-2000, on page 62. Then install power and ground connections

using the procedure described in Making Ground and Power Connections, on page

64.

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Connecting an SDU-2000 Expansion Shelf

Chapter 2 Installing the SSU-2000

Connecting a Single SDU-2000 Expansion Shelf

To connect a single SDU-2000 to the SSU-2000 main shelf, use the following procedure. Figure 2-11 shows the wiring diagram for a single SDU-2000 installation.

1. Remove the Expansion Terminator (part number 12013040-000-0-1, if installed) from J8 on the rear panel of the SSU-2000. Set the terminator aside for use in step 3, below.

2. Attach one end of the Expansion Cable (part number 12013050-xxx-0; the xxx indicates the length of the cable) to J8 on the rear panel of the SSU-2000.

3. Attach the other end of the Expansion Cable to either J17 or J15 on the rear panel of the SDU-2000.

If you are installing only one SDU-2000, then att ach the Expansion Terminator to either J15 or J17, whichever is available.

4. Attach one end of the Backup Clock cable (part number 12013115-xxx-0; the xxx indicates the length of the cable) to J9 on the rear panel of the SSU-2000.

5. Install a BNO tee connector (part number 551095-0001) on J16 on the rear panel of the SDU-2000.

6. Attach the other end of the Backup Clock cable to the tee connector on J16.

7. Set the Clock Termination switch S2 to the 120 Ohms position.

8. Set the Shelf Address switch S1 to the 2 position.

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Chapter 2 Installing the SSU-2000

Connecting an SDU-2000 Expansion Shelf

Figure 2-11. Wiring Diagram for a Single SDU-2000 Shelf

Connecting Additional SDU-2000 Expansion Shelves

To connect additional SDU shelves to an SDU, use the following procedure. Figure

2-12 illustrates the wiring for a system with three SDU-2000 shelves.

1. Remove the Expansion Terminator (if installed) from J17 or J15 on the rear panel of the SDU-2000.

2. Attach one end of the Expansion Cable (part number 12013050-xxx-0; the xxx indicates the length of the cable) to either J17 or J15 on the rear panel of the first SDU-2000 shelf, whichever is available.

3. Attach the other end of the Expansion Cable to either J17 or J15 on the rear panel of the second SDU-2000 shelf.

If you are not installing a third SDU-2000, then attach the Exp ansion Terminator to either J17 or J15 of the second shelf, whichever is available.

4. Set the Clock Termination switch S2 on the rear panel of the first SDU-2000 to the Open position.

Caution: To avoid damage to the BNO tee connector , be sure to align its internal pins with the mating connector. The tee connector does not rotate once it is installed.If J9 is damaged, you will have to replace the entire shelf.

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Connecting an SDU-2000 Expansion Shelf

Note: Perform step 5 below only if a BNO tee connector is not

installed on J16 on the first SDU-2000 shelf. If a tee connector is installed, skip to step 6.

Chapter 2 Installing the SSU-2000

5. Remove the Backup Clock cable from J16 on the rear panel of the first SDU-2000 shelf. Install a BNO tee connector (part number 551095-0001) to J16. Reconnect the Backup Clock cable to the tee connector.

6. Install a BNO tee connector (part number 551095-0001) to J16 on the rear panel of the second SDU-2000 shelf.

7. Attach one end of a second Backup Clock cable (part number 12013115-xxx-0; the xxx indicates the length of the cable) to the tee connector on J16 of the first SDU-2000 shelf

8. Attach the other end of the Backup Clock cable to the tee connector on J16 on the second SDU-2000 shelf.

9. Set the Clock Termination switch S2 on the rear panel of the second SDU-2000 to the 120 Ohms position.

Note: For installations with multiple SDU-2000 shelves, set S2 on all shelves to Open, except for the last shelf in the chain; set S2 on this shelf to 120 Ohms.

10. Set the Shelf Address switch S1 on the rear panel of the second SDU-2000 shelf to the 3 position.

Note: For installations with multiple SDU-2000 shelves, set S1 on each shelf to the number corresponding to the shelf’s position in the chain.

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Connecting an SDU-2000 Expansion Shelf

Figure 2-12. Wiring Diagram for Multiple SDU-2000 Shelves

80 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007

Handling Modules

The SSU-2000 shelf has twelve plug-in module slots, numbered A1 through A12, from left to right looking at the front of the shelf. Each module slot has a specific address and has two hybrid DIN connectors associated with it on the backplane. The hybrid contacts of these connectors are used for Power, Logic Ground, Frame Ground and RF connections. Each module slot has three pins connected together on each hybrid DIN connector which are to detect module removal.

Caution: To avoid equipment damage due to poor ventilation and EMI considerations, each slot in the SDU-2000 must contain either a module or blank filler panel. Filler panels are available for unpopulated slots.

Take the following precautions when handling any of the modules:

1. Use proper static control precautions when handling modules! Protect the equipment against ESD (electrostatic discharge) by using a grounded protective wrist strap and normal equipment grounding. Two ground connectors are provided on the side of the unit to connect these straps to frame ground (one on each mounting bracket).

Chapter 2 Installing the SSU-2000

Handling Modules

2. Avoid touching component leads and edge connectors.

3. Avoid placing the module on an ungrounded surface.

4. Avoid allowing the module to come in contact with insulated surfaces.

Installing a Module

This procedure is common for all modules.

Note: Modules can be removed and inserted while system power is supplied without damaging modules or affecting system operation.

Caution: For continued EMC compliance, replace all deformed module gaskets with the same type. Clean gaskets and mating surfaces. Secure all modules with captive screws.

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Chapter 2 Installing the SSU-2000

Handling Modules

To install a module:

1. Align the module card edges with the plastic card guides of the selected slot.

2. Slide the module into the shelf until it seats fully into its rear panel edge connector.

Tighten the ca ptive screws located at the top and bottom of the mo dule front panel.

Caution: To avoid possible damage and intermittent failures, ensure that you have completely inserted the module into the system and that you have securely tightened the captive screws.

4. Enable the module using either ICS or TL1 commands. The example commands are for slot 3 in the main shelf.

ICS command:

Type

CONFIG 1A3 ENABLE, then press Enter.

TL1 command:

ACT-MODULE::S1A3:123;

Exchanging a Module

Use this procedure to exchange one type of module with the same type or a different type of module in the same slot. The example commands are for slot 3 in the main shelf.

1. Connect to the SSU-2000 using one of the methods described in

Connection With the SSU-2000

, on page 90. The system prompts for a user

name.

2. Log in to the system using your user name and password.

3. Disable the module using either ICS or TL1 commands. The example commands are for slot 3 in the main shelf.

ICS command:

Type

CONFIG 1A3 DISABLE, then press Enter.

TL1 command:

DISC-MODULE::S1A3:123;

Establishing a

4. Loosen the captive screws located at the top and bottom of the module front panel.

5. Pull up on the top extractor and down on the bottom extractor to unseat the module from the connector on the backplane.

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Chapter 2 Installing the SSU-2000

Handling Modules

6. Slide the module out of the shelf.

7. Insert the new module into slot 3 of the main shelf. Tighten the captive screws on the front panel of the module. Wait for the “

module installed” message to

appear.

Note: Be sure that the I/O Adapter port is of the proper type and impedance for the new module.

Caution: To avoid possible damage and intermittent failures, ensure that you have completely inserted the module into the system and that you have securely tightened the captive screws.

8. Enable the module using either TL1 or ICS commands:

ICS command:

Type

CONFIG 1A3 ENABLE, then press Enter.

TL1 command:

ACT-MODULE::S1A3:123;

9. Verify that the module is entered in the registry:

ICS command:

CONFIG, then press Enter.

Type

TL1 command:

RTRV-INV:::123;

Disabling a Module

Use this command to temporarily disable a module without removing it from the SSU-2000 registry. All outputs from the disabled module will turn off, unless a summer adapter is installed on the I/O connector on the rear panel of the shelf. The example commands are for slot 3 in the main shelf.

1. Connect to the SSU-2000 using one of the methods described in

Connection With the SSU-2000

, on page 90. The system prompts for a user

name.

2. Log in to the system using your user name and password.

Establishing a

3. Disable the module using either ICS or TL1 commands:

ICS command:

CONFIG 1A3 DISABLE, then press Enter.

Type

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Chapter 2 Installing the SSU-2000

Handling Modules

TL1 command:

DISC-MODULE::S1A3:123;

Removing Modules

This procedure describes how to permanently remove a module from the shelf.

Note: Modules can be removed and inserted while system power is supplied without damaging modules or affecting system operation.

1. Connect to the SSU-2000 using one of the methods described in

Connection With the SSU-2000

, on page 90. The system prompts for a user

Establishing a

name.

2. Log in to the system using your user name and password.

3. Disable the module using either ICS or TL1 commands. The example commands are for slot 3 in the main shelf.

ICS command:

Type

CONFIG 1A3 DISABLE, then press Enter.

TL1 command:

DISC-MODULE::S1A3:123;

4. Loosen the captive screws located at the top and bottom of the module front panel.

5. Pull up on the top extractor and down on the bottom extractor to unseat the module from the connector on the backplane.

6. Slide the module out of the shelf.

7. Install a blank filler panel to cover the empty slot.

8. Remove the module from the registry using either ICS or TL1 commands:

ICS command:

Type

CONFIG 1A3 REMOVE, then press Enter.

TL1 command:

RMV-MODULE::S1A3:123;

9. Verify that the module is not in the registry:

ICS command:

Type

CONFIG, then press Enter.

84 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007

TL1 command:

RTRV-INV:::123;

Installation Checklist

1. Unpack all equipment carefully and check it against the purchase order.

2. Remove the A-BUS and B-BUS fuses from the rear of the unit.

3. Ensure shelf and I/O adapters are securely attached to the mounting rack.

4. Ground the SSU-2000 using the Frame Ground lug.

5. Measure between ground and chassis and verify no voltage exists between them.

6. If an SDU-2000 Expansion shelf is not being installed, ensure that the J8 connection is connected to a terminator.

Chapter 2 Installing the SSU-2000

Installation Checklist

7. Connect office alarms to the REMOTE and LOCAL terminals with 18 AWG wire.

8. Insert modules and filler panels in designated slots. Use proper handling technique.

9. Connect primary power to A-BUS screws and secondary power to B-BUS screws.

10. Measure voltage at POWER A and POWER B (if used) and verify it is –38 to –72 VDC.

11. Insert the A-BUS and B-BUS fuses into the holders on the rear panel of the SSU-2000.

12. Verify all modules are receiving power and generating regulated DC outputs by checking that their POWER indicators are lit.

13. To ensure that both power inputs are valid, verify on the Communications or Buffer modules that the green POWER indicator on the front of the Communications module is on. Also verify that the –48V Power A and B LEDs are both green. If all these indicators are not green, refer to color code indications. Refer to

Chapter 5, Maintenance and Troubleshooting

Table 2-5

for the module

, if

you are unable to obtain the correct indications.

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Chapter 2 Installing the SSU-2000

Powering Up the SSU-2000

Table 2-5. Communications and Buffer Module LED Indications

LED State Indication

Power On At least one –48V Power Supply is connected Power Off No –48V Power Supply A or B connected –48V Power Supply A or B On (Green) Power Supply is connected –48V Power Supply A or B Off No –48V Power Supply connected to the power

supply input

–48V Power Supply A or B On (Amber) –48V Power polarity is reversed

Powering Up the SSU-2000

The SSU-2000 is not equipped with a Power switch. Power to the SSU-2000 is controlled by two 5-amp fuses located on the rear of the SSU-200 0 main chassis as shown in Figure 2-13. To power down the shelf, remove both fuses.

Figure 2-13. SSU-2000 Power Fuses

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Normal System Indications During Turn-Up

Chapter 2 Installing the SSU-2000

SSU-2000 Main Shelf

To power up the SSU-2000 main shelf, insert the two fuses into the fuse slots on the rear panel of the SSU-2000 main chassis (see Figure 2-13).

SDU-2000 Expansion Shelf

The SDU-2000 expansion shelf is not equipped with a Power switch. Power to the SDU-2000 is controlled by two external power supplies that provide –48/60 VDC to the SDU-2000 main chassis (A-BUS and B-BUS) at connectors J101 and J102. To power up the shelf, turn the power on to both power supplies.

Normal System Indications During Turn-Up

This section describes the procedures for bringing the SSU-2000 on-line after completion of the system installation. After completion of the turn-up procedures, complete the commissioning tests in Chapter 4, Commissioning to ensure that the shelf is functioning properly.

As the shelf powers up and begins normal operation, the LEDs on the front of each of the installed modules go through a sequence as follows:

 S tratum 2E Clock Module – The POWER LED turns green and st ays green when

the fuses are installed in the Main chassis. The STATUS LED blinks green and amber for approximately 10 to 15 seconds and then stays green. The WARMUP LED turns amber for approximately 30 seconds to 5 minutes; it then turns off and the ACQUIRE LED turns green. The ACQUIRE LED stays green for 10 to 15 minutes until the module locks onto a signal, then the LED turns off. The SELECTED LED turns green on the selected clock module after the ACQUIRE LED on the clock module turns green. The LOCKED LED then turns green and stays green.

 S tratum 3E Clock Module – The POWER LED tu rns green when power is applied

to the unit and stays green. STATUS LED blinks green and amber for approximately 10 to 15 seconds and then stays green. The WARMUP LED turns amber for 30 seconds to approximately 20 minutes, then it turns off and the ACQUIRE LED turns green. The ACQUIRE LED stays green until the module locks onto a signal (10 to 15 minutes); then the LED extinguishes. The SELECTED LED turns green on the selected clock module after the ACQUIRE LED turns green. The LOCKED LED turns green and stays green.

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Chapter 2 Installing the SSU-2000

After Turn Up

 Communications Module – The POWER LED turns green when power is applied

to the unit and stays green. The STATUS LED blinks green and amber for approximately 10 to 15 seconds and then stays green. The -48V POWER LEDs A and B turn green to indicate that the power supplies are connected. If one of these LEDs are amber, the polarity of that power connection is reversed and needs to be switched. The three ALARM LEDs clear after ~1 minute. After initialization, if there are any alarms, it takes approximately 30 seconds to register and the ALARM LED turns amber. The ETHERNET LINK LED blinks green for approximately 30 seconds and stays green.

 Input Module – The POWER LED turns green when power is applied to the unit

and remains green while the system is powered up. The STATUS LED blinks green and amber for approximately 10 to 15 seconds and then stays green. The PORT 1 REF LED blinks for approximately 5 to 10 seconds and turns green for the reference input and off for the others. The INPUT LED blinks for approximately 5 to 10 seconds and turns green for every valid input or amber for not valid inputs.

 Output Module – The POWER LED turns green when power is applied to the unit

and stays green. The ST ATUS LED blinks green and amber for approximately 10 to 15 seconds and then stays green. The SOURCE LED turns green for the source clock, amber for an enabled clock that is not present and off for an enabled clock that is present but not the source clock.

After Turn Up

This completes the turn-up procedures. After completing the turn-up procedures perform the following:

 Assign a System Administrator and any additional users to the system using the

procedures in Adding An Administrator-Level User to the System, on page 95.

 Make any required changes to the factory default configuration settings as

described in Initial Provisioning, on page 105.

 Complete the commissioning tests in Chapter 4, Commissioning, to ensure that

the system is functioning properly.

 Refer to Chapter 5, Maintenance and Troubleshooting, to clear any system

alarms that might occur.

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Chapter 3 Provisioning and Operating the SSU-2000

This chapter provides operating instructions and software provisioning procedures for the SSU-2000 system.

In This Chapter

 Controls and Indicators  Establishing a Connection With the SSU-2000  Overview of the SSU-2000 Security System  Adding An Administrator-Level User to the System  Adding Users to the System  Initial Provisioning  Checking Alarm Status  Factory Default (Basic) Configuration

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CHpater 3 Provisioning and Operating the SSU-2000

Controls and Indicators

SSU-2000 Status LED Indicators

All modules used in the SSU-2000 main chassis and in the optional SDU-2000 Expansion shelf contain status LED indicators that provide a visual indication of module status. The Communications module provides both system and individual module status whereas all other modules provide individual module status only. For more information on individual module status LED indicators, refer to Chapter 6,

Clock and Communications Module Reference Data, Chapter 7, Input Module Reference Data, and Chapter 8, Output Module Reference Data.

SSU-2000 Operating Controls

The SSU-2000 contains four hardware operating controls:

 Three DCE/DTE select switches associated with the three RS-232 ports. One

switch is located on the front of the Communications module and the remaining two are located on the rear panel of the SSU-2000. The DCE position is for connection to a PC and the DTE position is for connection to a modem.

 Reset (RST) switch on the Communications module

All other controls on the SSU-2000 are software-based. To provision the settings, you must first connect to the SSU-2000 using a serial port or the Ethernet port.

Establishing a Connection With the SSU-2000

You can connect to the SSU-2000 using either a serial connection or an Ethernet connection. To connect via a serial port, see Communicating by Serial Port, on page

91. If the SSU-2000 is connected to an Ethernet LAN, use th e pro cedu re de scribed

in Connecting through the Ethernet LAN, on page 93. Refer to Table 3-1 for the serial and Ethernet communications port assignments.

Table 3-1. Communications Port Assignments

Port # Function Protocol

Serial Ports (EIA-232)

A (J4) This port is user selectable as either an ICS or a TL1

interface. The port defaults to ICS upon initialization

ICS (Default), TL1

B (J5) This port is user selectable as either an ICS or a TL1

interface. The port defaults to ICS upon initialization

Local (Comms Module)

90 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007

This port is user selectable as either an ICS or a TL1 interface. The port defaults to ICS upon initialization

ICS (Default), TL1

Table 3-1. Communications Port Assignments (Continued)

Port # Function Protocol

Ethernet Ports (Telnet)

Chapter 3 Provisioning and Operating the SSU-2000

Establishing a Connection With the SSU-2000

23 This port is user selectable as either an ICS or a TL1

interface. The port defaults to ICS upon initialization 123 This port is designated for NTP only NTP 161 This port is designated for SNMP Interactive SNMP Interactive 162 This port is designated for SNMP Trap transmission SNMP Trap 2000 This port is designated for TL1 only TL1

ICS (Default), TL1

Communicating by Serial Port

Three EIA-232 ports are available on the SSU-2000. Attach a PC with terminal emulation software to one of the ports as shown in Figure 3-1 (this example shows connecting to the local port on the front of the Communications module).

Figure 3-1. Direct Connection Using the Serial Port

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CHpater 3 Provisioning and Operating the SSU-2000

Establishing a Connection With the SSU-2000

1. Connect one end of the cable to the serial port on the computer or terminal and the other to the appropriate connector on the SSU-2000.

2. Set the DTE/DCE switch on the rear panel of the SSU-2000 for the type of cable (straight-through or modem).

3. Configure the emulation software for 8 data bits, no parity, 1 stop bit, and 9600 baud rate.

4. Start the terminal emulation software and press Enter. The system prompt

should appear. If it does not, recheck each step in this procedure.

5. For the initial installation, create an Administrator-level user as described in

Adding An Administrator-Level User to the System, on page 95, before

proceeding with the Ethernet setup.

Communicating by Ethernet

To communicate with the SSU-2000 using an Ethernet LAN, you must first configure the Ethernet port. This section describes how to configure the Ethernet port and then connect to the SSU-2000 using the Ethernet port.

When you connect to the SSU-2000 via Ethernet port 2000 (decimal) using a Telnet-type application, the session opens in TL1 mode. Up to four sessions (users) can be connected to port 2000 at one time. Once you are connected, you must log in using the ACT-USER command with a user name and password (if security is active on the unit).

To log off the user and exit from an Ethernet session, type Another user can then open a new session by using the ACT-USER command.

CANC-USER:::0;.

To log off the user, exit from an Ethernet session, and close the Etherne t connection to port 2000, type

EXIT:::0;. The next user must first connect to port 2000 and

then log in using the ACT-USER command.

Configuring the Ethernet Port

Use the following procedure to configure the SSU-2000 Ethernet parameters (IP Address, Subnet Mask, and Gateway Address).

1. Establish a direct serial connection to the SSU-2000 as described in

Communicating by Serial Port, on page 91.

2. Provision the IP, Gateway, and Subnet addresses for the SSU-2000. The IT department or site administrator for your location can recommend specific addresses for these parameters. Use the format xxx.xxx.xxx.xxx for the addre ss.

ICS commands:

Type

IP ADDR [ip address] then press Enter.

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Chapter 3 Provisioning and Operating the SSU-2000

Overview of the SSU-2000 Security System

Type IP GATEWAY [gate address] then press Enter. Type

IP SUBNET [subnet address] then press Enter.

TL1 command:

SET-PRMTR-IP:::123::[ip address],[gate address],[subnet address];

3. Restart the Communications module:

ICS command:

Type

restart 1A02, then press Enter.

TL1 command:

RST-MODULE::S1A2:123;

4. Verify that the information is correct:

ICS command:

Type

ip, then press Enter.

TL1 command:

RTRV-PRMTR-IP:::123;

Connecting through the Ethernet LAN

After the Ethernet port is configured, use the following procedure to connect to it:

1. Ensure that the SSU-2000 is connected to a LAN. See Making Ethernet

Connections, on page 72 for details.

2. Telnet from your PC to the IP address assigned to the SSU-2000.

3. Type your user name and press Enter. If you are not assigned as a user in the system, contact the System Administrator.

4. Enter your assigned password and press Enter. The system prompt appears.

Overview of the SSU-2000 Security System

The operating software of the SSU-2000 includes a subset of GR-815 security requirements, including user lockout, password aging, and login failure attempts. New commands allow an Administrator-level user to query the security log, set the login failed attempts threshold, set user lockout timer, and set the password-aging timer. New commands also allow you to ba ck up and restore the configuration in th e shelf. See the SSU-2000 Technical Reference for details on the security commands.

Passwords must have at least one alphanumeric, one numeric, and one special (punctuation, for example) character. The user must create a new password after the specified password aging period has elapsed; the new password cannot be the same as any of the previous three passwords. The user must confirm entry of a new password by re-typing the password.

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CHpater 3 Provisioning and Operating the SSU-2000

Overview of the SSU-2000 Security System

If a user fails to enter a correct password in a preset number of attempts, that user is locked out from further attempts to log in for a specified amount of time, and an entry is made in the security log. An Administrator-level user can set the number of attempts, the lock-out period, and password aging.

A security log maintains a record of each login attempt, successful logins, and log-outs. Other events stored in the log including adding and changing users, changes to a user’s profile (password and/or access level), enabling and disabling a user, or changes to the password aging p eriod. The log records the date and time of each entry, the user ID, and the session type. Passwords are not stored in the security log. This log is stored in non-volatile memory, and cannot be modified or deleted by any user.

In order to use the security features, the hardware and firmware in the SSU-2000 must be as shown in Table 3-2.

Table 3-2. Firmware Requirements for Security Features

Module

Communications module

Clock modules

Note:

The hardware revision is on a label locate d on the front panel. You can disp lay the hard ware

revision by issuing the TL1 command RTRV-INV, or the ICS command CONFIG.

JCC = Japan Composite Clock

Module Part

Number

23413012-00x-0 A.00 or higher 14313012-000-5 Rev. M.00

23413015-00x-0 23413016-000-0

Hardware Revision

Required

A.00 (JCC A.00 (JCC: A.10) or higher

: B.00) or higher

Firmware Code Part

Number

14313015-000-5 Rev. M.00

The SSU-2000 system software allows you to set up a list of users with one of five access levels; each level has an increasing level of access to system functions and commands. Each incremental access level incorporates all of the options from the lower numbered access levels and additional options at that level. For instance, a User-level user does not have as many options available as a Technician-level user.

An Administrator-level user assigns the access level to each user when the user id and password is created. Table 3-3 summarizes each access level, ID number, and the operator privileges for each level.

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Chapter 3 Provisioning and Operating the SSU-2000

Adding An Administrator-Level User to the System

Table 3-3. User Access Levels

Level ID Description

Idle 0 Access level 0 is available when no user is logged in. This level allows

Idle-level users to view a list of available commands (HELP), syntax, sof tware version number, unit id, or to login.

User 1 Users at the User level can view information about the current configuration

and operation, and change communication settings such as line termination and echo. Changes made by a User-level user remain in effect only until the user logs out.

Technician 2 Users at the Technician level (CRAFT persons) can perform all level 1

functions, and can read or set all installation functions.

Supervisor 3 Supervisor-level users can execute all commands at levels 1 through 2, and

can read or set all functions.

Administrator 4 Administrator-level users can execute all levels of commands; they can view

and set software configurations; they can also add, delete, or modify the user table, or log off any user from any port.

Adding An Administrator-Level User to the System

An Administrator-level user must be added to the user list when you log in for the first time. This user performs initial setup and can assign user privileges and passwords as needed, as well as configuring all system parameters.

Caution: You must add an Administrator-level user and password before adding any other users. If you add a user that is not at the Administrator security level before adding the administrator, you will not be able to log into the unit at that level again without a service call.

Perform the following steps to add an Administrator-level user to the system.

1. Establish a direct serial connection to the SSU-2000 as described in

Communicating by Serial Port, on page 91.

2. Type

3. Press Enter for the first-time system login (otherwise enter your password) and

admin at the username prompt for the first-time system login (otherwise

enter your username) and press Enter. The system prompts for a password.

press Enter. The system prompt appears.

4. Type

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user add and press Enter. The system prompts you for a user name.

CHpater 3 Provisioning and Operating the SSU-2000

Adding Users to the System

5. Enter a “username” and press Enter. The name you enter will be the log-in name for the system administrator . You can use up to 20 characters for the user name. The system prompts you for a password.

6. Enter a “password” and press Enter. Passwords must have at least one alphanumeric, one numeric, and one special (punctuation, for example) character. The password can be up to 10 characters long. The password you enter will be the log-in password for the system administrator. The system prompts you to confirm the password by retyping it.

7. Retype the password and press Enter. The system prompts for an access level.

8. Type

4 and press Enter. This select s the Administrator access level. The syst em

prompt appears.

9. Type

10.Type

bye and press Enter to log off the system.

Enter. This verifies that the account exists.

11.Type

bye and press Enter to log off the system.

Adding Users to the System

Only an Administrator-level user can add new users to the SSU-2000 user list. You can use ICS or TL1 commands.

Using ICS Commands

1. Connect a computer to an ICS port on the SSU-2000 and log in using an Administrator-level user name and password, as described in Logging In to the

SSU-2000, on page 102.

2. Type

USERS ADD then press Enter to create a new user account. The system

prompts for the new username.

3. Type in the new username, then press Enter. The system prompts for the new user’s password.

4. Type in the new user’s password and press Enter. The system prompts you to confirm the password by retyping it.

5. Type in the new user’s password and press Enter. The system prompts for an access level.

6. Type in the new user’s access level (a number between 1 and 4, inclusive), and press Enter. The following text shows the dialog for creating a new level-1 user with the name david1:

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Chapter 3 Provisioning and Operating the SSU-2000

SSU_2000->users add Username: DAVID1 Password: ******* Confirm: ******* Access: 1 2006-02-22T16:49:55 1A02 Rep Add User, DAVID1, TELA SSU_2000+>

Adding Users to the System

7. Type users and press Enter to display the user table. The system responds with a list similar to the following:

2006-02-23T22:01:45 ID: SSU2000, Name: SSU_2000 Password Aging: Enable User Lockout: Enable

User Name Level User Password DaysLeft Lock

-------------------- ----- ---- -------- -------- ---ADMIN 4 ENA ALIVE 23 NO DAVID 4 ENA ALIVE 28 NO DAVID1 1 ENA ALIVE 29 NO SSU_2000->

Using TL1 Commands

1. Connect a computer to port 2000 on the SSU-2000 and log in using an Administrator-level user name and password, as described in Logging In to the

SSU-2000, on page 102.

2. Type

3. Type

SET-USER:::123::ADD,FRANK1,ABC123!,1; to add a user named FRANK1

with a password of

SSU_2000 06-02-21 20:07:21 M 123 COMPLD "\"PASSWORD CONFIRMATION REQUIRED, SET-PWD-CONFIRM\"" ;

SET-PWD-CONFIRM:::123::ABC123!;

ABC123! at the User level. The system responds with:

to confirm the new password. You must issue the SET-PWD-CONFIRM comma nd imme diately a f ter the SET-USER command in order to validate the SET-USER command. The system responds with:

SSU_2000 06-02-21 20:21:41

A 000001 REPT EVT

"S1A02:NA,193,NSA,06-02-21,20-21-41:\"Add User, FRANK1, TL1B\"" ;

4. Type RTRV-USER:::123; to display a list of users in the system. The system responds with:

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CHpater 3 Provisioning and Operating the SSU-2000

Setting Security Parameters

SSU_2000 06-02-22 14:32:40

M 123 COMPLD

"ADMIN,4,ENA,ALIVE,23,NO" "DAVID,4,ENA,ALIVE,28,NO" "DAVID1,1,ENA,ALIVE,29,NO" "FRANK1,1,ENA,ALIVE,29,NO"

;

where the format for the list of users is username, level, password State,

password days left, lockout

Setting Security Parameters

Only an Administrator-level user can access security parameters for the SSU-2000 . You can use ICS or TL1 commands to set the security parameters, which include the following:

 Setting the Number of Failed Attempts Counter – if a user cannot log in correctly

within this number of attempts, that user is then prevented from further attempts for the period specified in the Lockout time parameter.

 Setting the Lockout T ime – When a user has exceeded the number of failed login

attempts, that user is prevented from further attempts to log in for the period specified in this parameter.

 Setting the Password Aging – A user’s password is valid for the number of days

specified in this parameter . If the user attempt s to log in after this number of days, the user must create a new password.

 Viewing the Security Log – The security log contains information related to the

security of the system, such as the login attempts, successful logins, logouts, etc.

 Setting User Parameters, such as:

– Changing a Password – Changing Access Level – Deleting a User – Setting a Temporary Password – Enabling, Disabling, and Unlocking Users

Using ICS Commands

1. Connect a computer to a serial port on the SSU-2000 and log in using an Administrator-level user name and password, as described in Logging In to the

SSU-2000, on page 102.

2. Type

SECURITY FAIL 3 and press Enter to set 3 as the number of failed login

attempts before disabling the user account.

3. Type

SECURITY LOCKOUT 60 and press Enter to set the lockout time to 60

seconds.

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Setting Security Parameters

4. Type SECURITY AGING 30 and press Enter to set the password to expire in 30 days.

5. Type

SECURITY LOG 10 then press Enter to display the last 10 entries in the

Security log. The log appears as shown:

SSU_2000->security log 10 2006-02-22T18:41:29 ID: SSU2000, Name: SSU_2000 Time Stamp Description Information

------------------- ----------------- -----------------------2006-02-22T17:11:04 LOGIN ENET,TL1,DAVID1 2006-02-22T17:12:18 CHANGE_PASSWORD ENET,TL1,DAVID1 2006-02-22T17:16:34 LOGIN_FAIL ENET,TL1,ADMIN 2006-02-22T17:21:20 LOGOUT ENET,TL1,DAVID1 2006-02-22T17:31:48 LOGIN_FAIL ENET,TL1,ADMIN 2006-02-22T17:47:01 LOGIN_FAIL ENET,TL1,ADMIN 2006-02-22T18:02:10 LOGIN_FAIL ENET,TL1,ADMIN 2006-02-22T18:17:19 LOGIN_FAIL ENET,TL1,ADMIN 2006-02-22T18:32:32 LOGIN_FAIL ENET,TL1,ADMIN 2006-02-22T18:41:24 LOGIN ENET,ICS,DAVID SSU_2000->

Changing a User’s Password

1. Type

USERS PWD then press Enter to change a password. The system prompts

for the user name that is to receive the new password.

2. Type the user name, then press Enter. The system prompts for the new password.

3. Type the new password, then press Enter. The system prompts you to confirm the new password.

4. Retype the new password, then press Enter. If you do not type the new password exactly the same, the command fails.

Setting a Temporary Password

An Administrator-level user can create a temporary password for a user. When a user logs in using the temporary password, that user must create a new password before continuing.

1. Type

USERS TEMPPWD then press Enter to create a temporary password. The

system prompts for the user name that is to receive the new password.

2. Type the user name, then press Enter. The system prompts for the password.

3. Type the new password, then press Enter. The system prompts you to confirm the password.

4. Retype the new password, then press Enter. If you do not type the new password exactly the same, the command fails.

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Setting Security Parameters

Changing a User’s Access Level

1. Type

USERS ACCESS then press Enter to change a user’s access level. The

system prompts for the user name that is to receive the new access level.

2. Type the access level (1 through 4), then press Enter.

Deleting a User

1. Type

USERS DEL then press Enter to delete a user from the user table. The

system prompts for the user name that you want to delete.

2. Type the user name, then press Enter. The system deletes the user from the user table.

Enabling, Disabling, and Unlocking Users

An Administrator-level user can enable or disable a user from accessing the SSU-2000 without removing the user name from the user table. If a user exceeds the number of failed attempts to log in, then the user name is locked for a period of time. An Administrator-level user can unlock the user name and allow the user to attempt to log in, overriding the Lockout Time parameter.

1. Type

USERS DISABLE then press Enter to disable a user from accessing the

SSU-2000. The system prompts for the user name that you want to disable.

2. Type the user name, then press Enter. The system disables the user.

3. Type

USERS ENABLE then press Enter to allow a user to access the SSU-2000.

The system prompts for the user name that you want to enable.

4. Type the user name, then press Enter. The system enables the user.

5. Type

USERS UNLOCK then press Enter to unlock a user name. The system

prompts for the user name that you want to unlock.

6. Type the user name, then press Enter. The system unlocks the user.

Using TL1 Commands

1. Connect a computer to port 2000 on the SSU-2000 and log in using an Administrator-level user name and password, as described in Logging In to the

SSU-2000, on page 102.

2. Type

SET-PRMTR-SECU:::123::3,60,60; to set to 3 the number of failed login

attempts before disabling the user account, to set the lockout time to 1 minute, and to set the password to expire in 60 days. The system responds with:

SSU_2000 06-02-21 20:27:35

A 000002 REPT EVT

"S1A02:NA,215,NSA,06-02-21,20-27-35:\"Security, Lockout, 60, TL1B\""

;

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Symmetricom SSU-2000, SDU-2000 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

How to Use This Guide

Chapter 1 Product Overview

Overview

Typical System Configurations

Timing Signal Generator (TSG) Configuration

Primary Reference Source (PRS) Configuration

SSU-2000 Configured as a Monitor-Only System

System Architecture

Input Section

Output Section

Clock Section

Communications Section

Alarms and Events

System Components

SSU-2000 Main Shelf (Chassis)

SSU-2000 Family of Modules

Clock and Communications Modules

Input Modules

Output Modules

Configuring Redundant Output Modules

Input and Output Adapter Panels

Communications Protocol

Software Interface

Software Versions

Basic System Load

Graphical User Interface

Overview of SSU-2000 Operation

Synchronization Status Messages (SSMs)

SDU-2000 Synchronization Distribution Unit

Indicators and Controls

Functional Overview

Expansion Shelf Features

Setting the Expansion Shelf Address

Buffered Clocks

SDU Module Features

Connector Panel Features

Controls and Indicators

Chapter 2 Installing the SSU-2000

Unpacking and Inspecting the Shelf

Preliminary Procedures

Installation Tools and Materials

Electromagnetic Interference (EMI) Considerations

Rack Mounting the SSU-2000

Ventilation Considerations

SSU-2000 Shelf

Making Ground and Power Connections

I/O Adapter Panels

Making Ground Connections

Making Signal Connections

Connecting Power

Making I/O Connections

Installing Output Summer Adapters

Making Communication Connections

Making Ethernet Connections

Local Oscillator Outputs

Remote Reset

Making Alarm Connections

Connecting Antennas

Connecting an SDU-2000 Expansion Shelf

Connecting a Single SDU-2000 Expansion Shelf

Connecting Additional SDU-2000 Expansion Shelves

Handling Modules

Installing a Module

Exchanging a Module

Disabling a Module

Removing Modules

Installation Checklist

Powering Up the SSU-2000

Normal System Indications During Turn-Up

SSU-2000 Main Shelf

SDU-2000 Expansion Shelf

After Turn Up

Chapter 3 Provisioning and Operating the SSU-2000

Controls and Indicators

SSU-2000 Status LED Indicators

SSU-2000 Operating Controls