Symmetricom TimeHub 5500 User Manual

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TimeHub 5500

User’s Guide

Issue 8 – February 2005

Part Number 097-55501-01

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiv

Who Should Read This Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiv

Structure of This Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv

Conventions Used in This Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi

Warnings, Cautions, Recommendations, and Notes . . . . . . . . . . . . . . . . . . . . . . . . . xvii

Related Documents and Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii

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

What’s New In This Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii

Chapter 1 Description

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Physical Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Communication Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Input/Alarm Connector Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Clock Cards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Management Card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Output Driver Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Output Connector Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Connection Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Alarm Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Synchronization Status Messaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Input SSMs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Automatic Reference Switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Output SSMs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Passthrough Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Passthrough Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Firmware Versions and Passthrough Operation . . . . . . . . . . . . . . . . . . . . . . . . 31

Master/Remote Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Remote Shelf Capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

SSMs in a Remote Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Expansion Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Output Driver Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Expansion Controller Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Rear Panel of the Expansion Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Expansion Output Connector Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Output Driver Cards and Output Connector Modules . . . . . . . . . . . . . . . . . . . . 38

Redundancy Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Communicating With the Expansion Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

TimeScan THC Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

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Chapter 2 Engineering & Ordering Information

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Wire-wrap Panels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Card Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Clock Cards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Management Card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Output Driver Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Input/Alarm Connector Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Output Connector Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Expansion Controller Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Ordering and Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

User-Supplied Tools and Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Chapter 3 Installing the TimeHub

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Site Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Preliminary Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Installation Tools and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Electromagnetic Interference (EMI) Considerations . . . . . . . . . . . . . . . . . . . . . 65

Ventilation Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Installation Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Unpacking the TimeHub 5500 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Rack Mounting the TimeHub 5500. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Mounting the Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Installing the Wire-wrap Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Configuring the Shelf as a Master or Remote . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Making Ground and Power Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Grounding the Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Grounding the Wire-wrap Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Making Power Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Testing Power Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Installing Modules into the Rear Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Installing Rear Panel Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Installing the Input/Alarm Connector Module . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Installing Output Connector Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Installing Blank Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Making Signal Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Making Shelf–to–Panel Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Connecting Timing Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Making Communication Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Connecting Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

GPS Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Installing the Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

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Installing Expansion Shelves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Installing the Shelf in the Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Making Ground and Power Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Setting the Expansion Shelf Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Installing Output Connector Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Making Expansion Shelf Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Chapter 4 Testing and Configuring the TimeHub

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Installing Cards into the Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Installing the Management Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Installing the Clock Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Confirming the Master or Remote Shelf Setting . . . . . . . . . . . . . . . . . . . . . . . 106

Installing Output Driver Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Installing Cards into the Expansion Shelf. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Installing Expansion Controller Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Installing Output Driver Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Establishing a Connection to the TimeHub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Communicating by Serial Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Communicating by Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Provisioning Master Shelf Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Setting the Date and Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

Setting the System ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Setting the Target ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Verifying the Hardware Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Provisioning Inputs on a Master Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

Provisioning Inputs on a Remote Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Testing the Clock Input Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

Provisioning the Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

Securing Cards in the Shelf. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Configuring CC Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Phase Aligning CC Input and CC Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

Setting the Delay on CC Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Checking System Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Enabling Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

Managing the User List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Setting the Configuration to Factory Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

Chapter 5 Maintaining the TimeHub 5500

Clearing Output Port Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

False Reporting of Output Port Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Clearing False Port Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

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Testing the Cards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

Reference Switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

Removing a Clock Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

Troubleshooting the TimeHub 5500. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

Troubleshooting the Clock Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

Troubleshooting the Output Driver Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162

Reading the Output Driver Firmware Version . . . . . . . . . . . . . . . . . . . . . . . . . 166

Troubleshooting the Management Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168

Troubleshooting the Expansion Controller Card . . . . . . . . . . . . . . . . . . . . . . . 174

Replacing Cards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177

Replacing the Clock Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177

Replacing the Output Driver Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178

Replacing the Management Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178

Replacing the Expansion Controller Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179

Replacing Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

Replacing the Fuse in the Clock Card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

Replacing the Fuse on the Management Card . . . . . . . . . . . . . . . . . . . . . . . . 181

Replacing the Fuse in the Output Driver Card . . . . . . . . . . . . . . . . . . . . . . . . 182

Replacing the Fuse on the EC Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183

Repair and Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184

Technical Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

Sales . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

User Manual Updates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186

Chapter 6 Specifications

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

Local Communication Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

LAN Communication Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

Remote Communication Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

GPS Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

Expansion Link 1 Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189

Expansion Link 2 Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189

DS1 Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189

PRS Reference Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190

Composite Clock Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190

DS1 Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190

Composite Clock Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

Output Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

Input Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192

Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192

Shelf Mechanical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192

Wire-wrap Panel Mechanical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193

Shelf and Wire-wrap Panel Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . 193

Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193

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Factory Default Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193

Management Card Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193

Clock Card Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

Output Driver Card Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195

User Changes to Factory Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196

Index

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viii TimeHub 5500 User’s Guide 097-55501-02 Issue 8 – February 2005

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Figures

1-1 The TimeHub 5500 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

1-2 TimeHub 5500 Shelf and Connection Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

1-3 Block Diagram of the TimeHub 5500 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

1-4 TimeHub 5500 Expansion Shelf – Front View. . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

2-1 Front and Rear of the High-Density Wire-wrap Adapter Panel . . . . . . . . . . . . . . . 42

2-2 Front Panel of the ST2-Rb Clock Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

2-3 Front Panel of the Management Card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

2-4 Front Panel of the Output Driver Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

2-5 Front Panel of the Input/Alarm Connector Module . . . . . . . . . . . . . . . . . . . . . . . . 53

2-6 Output Connector Modules for the Master/Remote Shelf: DS1 (left) and

CC (right). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

2-7 Output Connector Modules for the Expansion Shelf: DS1 (left) and CC (right) . . 56

2-8 Front Panel of the Expansion Controller Card . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

3-1 Mounting Options for the Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

3-2 High-Density Wire-wrap Panel (Front and Rear) . . . . . . . . . . . . . . . . . . . . . . . . . 69

3-3 Assembling the Rack Extenders for a 23-inch Shelf. . . . . . . . . . . . . . . . . . . . . . . 69

3-4 Sample Rack Installation of a Master Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

3-5 Sample Rack Installation of a Master and Expansion Shelf . . . . . . . . . . . . . . . . . 71

3-6 Master/Remote Rotary Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

3-7 Connectors on the Rear Panel of the Master Shelf. . . . . . . . . . . . . . . . . . . . . . . . 74

3-8 Wire-wrap Panel Ground Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

3-9 Power and Ground Connections on the Master Shelf. . . . . . . . . . . . . . . . . . . . . . 76

3-10 Location of Output Connector Modules on the Rear Panel of the

Master/Remote Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

3-11 Location of Output Connector Modules on the Rear Panel of the Expansion

Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

3-12 Rear Panel Connectors on the Main Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

3-13 Connecting Outputs to the High-Density Wire-wrap Panel . . . . . . . . . . . . . . . . . . 83

3-14 Connecting Outputs to Existing Wire-wrap Panels . . . . . . . . . . . . . . . . . . . . . . . . 84

3-15 Connecting A-D Outputs of the Expansion Shelf to the High-Density

Wire-wrap Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

3-16 Connecting E-H Outputs of the Expansion Shelf to the High-Density

Wire-wrap Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

3-17 Input/Alarm Connector Module Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

3-18 Power and Ground Connections on the Expansion Shelf . . . . . . . . . . . . . . . . . . . 92

3-19 Address Switch SW1 on the Expansion Shelf. . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

3-20 Location of Output Connector Modules on the Rear Panel of the

Master/Remote Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

3-21 Connecting a Single Expansion Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

3-22 Connecting Multiple Expansion Shelves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

4-1 Front Panel of the TimeHub 5500 Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

4-2 Location of Switch S1 on the Management Card . . . . . . . . . . . . . . . . . . . . . . . . 102

4-3 Front Panel of the Management Card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

4-4 Front Panel of the Clock Card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

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4-5 Clock Card Switch S1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

4-6 The TimeHub TimeScan THC Window in Serial Mode . . . . . . . . . . . . . . . . . . . . 111

4-7 The TCP/IP Dialog Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

4-8 Network Parameters Dialog Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

4-9 Set TimeHub Date and Time Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

4-10 Set TimeHub System ID Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

4-11 Set TimeHub Target ID Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

4-12 The TimeScan THC Input Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

4-13 The Remote Input Configuration Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

4-14 Configuring Outputs Using TimeScan THC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

4-15 DS1 Output Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

4-16 CC Output Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

4-17 The Configuration Output Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

4-18 Enabling Ports for CC Cable Compensation. . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

4-19 The User Administration Dialog Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

5-1 The Configuration Output Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

5-2 Attempt to Clear Port Alarm Query Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

5-3 Active DS1 Input Signal Indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

5-4 Front Panel of the Clock Card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

5-5 Front Panel of the Output Driver Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162

5-6 Front Panel of the Management Card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168

5-7 Front Panel of the Expansion Controller Card . . . . . . . . . . . . . . . . . . . . . . . . . . 174

5-8 Location of Fuse XF1 on the Clock Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

5-9 Location of Fuse F1 on the Management Card and the Output Driver Card . . . 181

5-10 Location of Fuse F1 on the EC Card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183

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Tab les

1-1 SSM Quality Level and Meaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

1-2 SSM Source Determination for Remote Shelf. . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

2-1 Wire-Wrap Panels Available for the TimeHub 5500 . . . . . . . . . . . . . . . . . . . . . . . 43

2-2 Wire-Wrap Connection Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

2-3 Cable Management Panels Available for the TimeHub 5500 . . . . . . . . . . . . . . . . 43

2-4 Accessories for Adapter Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

2-5 Clock Card Front Panel Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

2-6 Management Card Front Panel Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

2-7 Output Driver Card Front Panel Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

2-8 Expansion Controller Card Front Panel Indicators . . . . . . . . . . . . . . . . . . . . . . . . 58

2-9 Master and Remote Shelf Basic Components . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

2-10 Expansion Shelf Basic Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

2-11 Accessories and Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

3-1 Installation Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

3-2 Master/Remote Rotary Switch Settings and Functions. . . . . . . . . . . . . . . . . . . . . 73

3-3 LAN Connector Pinouts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

3-4 Pinout of Local Communications Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

3-5 Expansion Shelf Rotary Switch Settings and Functions . . . . . . . . . . . . . . . . . . . . 93

4-1 Management Card S1 Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

4-2 Clock Card S1 Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

4-3 Communications Port Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

4-4 Typical Oscilloscope Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

4-5 User Level and Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

4-6 Command Level and Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

5-1 Troubleshooting the Clock Card Front Using the LEDs . . . . . . . . . . . . . . . . . . . 157

5-2 Troubleshooting the Output Driver Card Using Front Panel LEDs . . . . . . . . . . . 163

5-3 Management Card Front Panel Items. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

5-4 Troubleshooting the Expansion Controller Card . . . . . . . . . . . . . . . . . . . . . . . . . 175

6-1 Management Card Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193

6-2 Clock Card Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

6-3 DS1 and E1 Output Module Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . 195

6-4 User Changes to Factory Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196

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xii TimeHub 5500 User’s Guide 097-55501-02 Issue 8 – February 2005

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 Guide

097-55501-02 Issue 8 – February 2005 TimeHub 5500 User’s Guide

How to Use This Guide

Purpose of This Guide

The TimeHub 5500 User’s Guide describes the procedures for unpacking, installing, using, maintaining, and troubleshooting the Symmetricom TimeHub 5500. It also includes appendixes that describe alarms and events, the languages that you use to communicate with the TimeHub 5500, default values, and other information.

Who Should Read This Guide

Chapter 1, Description, is written for non-technical audiences who need general

information about the product. Chapter 2, Engineering & Ordering Information, 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 TimeHub 5500,

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

 Installation Engineers – Chapter 2 through Chapter 6 and the Appendices

provide detailed information and procedures to ensure proper installation, turn-up, operation, configuration, and testing of the TimeHub 5500.

 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 TimeHub 5500 system, others, such as Chapter 2 through Chapter 6 contain detailed information and instructions which are intended to be performed by qualified personnel only.

xiv TimeHub 5500 User’s Guide 097-55501-02 Issue 8 – February 2005

How to Use This Guide

Structure of This Guide

This guide contains the following sections and appendixes:

Chapter, Title Description

Chapter 1, Description Provides an overview of the product, describes the major

hardware and software features, and lists the system specifications.

Chapter 2, Engineering & Ordering Information

Chapter 3, Installing the TimeHub

Chapter 4, Testing and Configuring the TimeHub

Chapter 5, Maintaining the TimeHub 5500

Chapter 6, Specifications Lists the specifications for the TimeHub 5500.

Index

Describes the modules and cards available with the TimeHub and provides the part numbers for the parts and accessories.

Contains procedures for unpacking and installing the product, and for powering up the unit.

Provides checklist-based commissioning tests that should be performed after completing turn-up and software configuration to ensure the system is ready for normal operation.

Describes SSU-2000 after installing the unit.

Contains preventive and corrective maintenance, and troubleshooting procedures for the product.

Provides references to individual topics within this guide.

the ICS and TL1 commands required to provision the

097-55501-02 Issue 8 – February 2005 TimeHub 5500 User’s Guide xv

How to Use This Guide

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.

When text appears

this way...

... it means:

TimeHub 5500 User’s Guide The title of a document.

SSU

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

CRITICAL IOC1

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

Press Enter Press ;

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.

SSU Username:

PING STATUS

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-sensitive operating systems exactly as shown.

A re-timing application A word or term being emphasized.

Symmetricom does not

A word or term given special emphasis.

recommend...

xvi TimeHub 5500 User’s Guide 097-55501-02 Issue 8 – February 2005

Warnings, Cautions, Recommendations, and Notes

How to Use This Guide

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 indicate a long-term health hazard.

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, electrical 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 important information, which may make your task easier or increase your understanding.

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How to Use This Guide

What’s New In This Guide

Issue 8 of this guide contains the following new information:

 New format and typography to make the text easier to read

 Procedures use TimeScan THC craft software version 3.2 and TL1 commands

 Expanded Index

xviii TimeHub 5500 User’s Guide 097-55501-02 Issue 8 – February 2005

Chapter 1 Description

This chapter describes the TimeHub 5500, and includes the following topics:

 Overview

 Physical Description

 Functional Description

 Alarms

 Synchronization Status Messaging

 Passthrough Mode

 Master/Remote Shelf

 Expansion Shelf

 TimeScan THC Software

Chapter

097-55501-02 Issue 8 – February 2005 TimeHub 5500 User’s Guide 19

Chapter 1 Description Overview

Overview

The TimeHub 5500, shown in Figure 1-1, is a building integrated timing supply (BITS) redundant timing distribution system for 1.544 Mb/s primary rate networks. The system tracks incoming timing references, qualifies the signals against network timing standards, then filters and distributes up to 140 precise timing signals.

The TimeHub 5500 clock uses precision timing references such as Primary Reference Clocks (PRCs) (cesium frequency standards), GPS Primary Reference Source (PRS) receivers, and DS1 input references from other nodes to generate synchronized composite clock (CC) (64 kb/s) and DS1 (1.544 Mb/s) timing output signals. These signals provide timing synchronization inputs to various network elements. If a reference input is lost, the TimeHub 5500 provides SmartClock holdover that exceeds Stratum 2 accuracy.

TimeHub 5500 applications include providing timing synchronization for ATM, SONET, and digital wireless networks.

The TimeHub 5500 supports up to four optional Expansion shelves. Each Expansion shelf provides up to 320 additional output signals, for a maximum of 1420 outputs in a full system.

Figure 1-1. The TimeHub 5500

20 TimeHub 5500 User’s Guide 097-55501-02 Issue 8 – February 2005

Physical Description

The TimeHub 5500 consists of a shelf, wire-wrap panel(s), plug-in cards, connector modules, cables, hardware, and software. As an option, you can install Clock cards with four additional DS1 inputs for a total of nine inputs. The shelf contains slots for a Management card, two Clock cards, and up to eight Output Driver cards.

The shelf and the connection panel(s) can be mounted in a 19-inch or a 23-inch rack, as shown in panel(s), except for a communications connector on the Management card.

Figure 1-2

Chapter 1 Description

Physical Description

. All connectors are at the rear of the shelf and connection

Figure 1-2. TimeHub 5500 Shelf and Connection Panels

Functional Description

The TimeHub 5500 accepts up to five incoming signals and selects one of the qualified references (inputs 0–4) as the active tracked reference using criteria programmed by a system administrator. The TimeHub then filters and distributes precise timing signals to the office equipment. Inputs 5–8 on an optional Clock card can be monitored for performance but none can be selected as the active reference that drives the outputs.

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Chapter 1 Description Functional Description

Figure 1-3 shows a block diagram of a TimeHub 5500 with redundant Clock cards

and 140 protected outputs. The outputs of each Clock card and the Management card are connected to all Output Driver cards. Expansion shelves are capable of providing 320 protected outputs.

Figure 1-3. Block Diagram of the TimeHub 5500

If all reference inputs fail, the system continues to provide timing by using its own internal reference as a source (holdover).

If both Clock cards are removed, the Management card provides an unfiltered version of an input to the output cards (passthrough). This feature is available on Master or Remote Master shelves with Clock and IMC cards equipped with hardware version “B” or higher and firmware version R4315C or higher. For more information on passthrough, see Passthrough Mode, on page 29.

Communication Ports

LAN

The LAN connection allows you to connect the TimeHub 5500 to an Ethernet network for monitoring and provisioning. You configure network parameters using TL1 commands. The TimeHub 5500 can support up to 10 simultaneous network sessions. The TL1 commands are described in detail in the TL1 Reference Guide.

22 TimeHub 5500 User’s Guide 097-55501-02 Issue 8 – February 2005

Chapter 1 Description

Functional Description

Local

There are two Local port connections: one on the rear panel of the shelf and one on the Management card. Dual connections are provided for access convenience and both are physically connected to the same serial port. These ports provide a means for TL1 command access to the TimeHub 5500.

Note: Communication cannot be established to both of the Local ports simultaneously; only one port can be used at a time.

Power Supply

Each card is provided with its individual power supply unit. Two external power inputs supply the voltage to each card on the shelf.

Input/Alarm Connector Module

The Input/Alarm Connector module provides the connections for input reference signals to the shelf and for the alarm outputs. There are five timing inputs: one PRS input and four DS1 inputs. The PRS input can be either 5 MHz or 10 MHz. Depending on the type of Clock card used, four additional DS1 timing inputs can be used for monitoring only.

DS1 inputs 1–4 can be used as a reference or for monitoring. (DS1 inputs 5–8 can only be monitored.) If used as a reference, the input may be used for tracking and can cause events or alarms if not qualified. Performance monitoring is also available for inputs used as references. If monitored only, the input is monitored without being used for tracking and no alarms occur, but the signal status is reported via the TL1 interface.

You make the alarm connections on the Input/Alarm Connector module as described in Alarm Connections, on page 26.

Clock Cards

Clock cards provide input monitoring, selection, and holdover. Two types of Clock cards are available for the TimeHub 5500:

 Standard Clock cards: These cards are equipped with five inputs (four DS1 and

one 5/10 MHz) and do not support Expansion shelves.

– Five-input with an ST2E rubidium oscillator (090-55513-01)

– Five-input with an ST3E quartz oscillator (090-55511-01)

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Chapter 1 Description Functional Description

 Extended-capacity Clock cards: These cards are equipped with nine inputs (four

DS1, four monitoring inputs, and one 5/10 MHz) and support Expansion shelves. If you plan to use an Expansion shelf (or shelves) attached to a Master shelf, you must use extended-capacity Clock cards.

– Nine-input with an ST2E rubidium oscillator (090-55514-02)

– Nine-input with an ST3E quartz oscillator (090-55512-02)

Two Clock cards are required for redundancy; oscillator types can be mixed.

Each Clock card receives the input reference signals from the Input/Alarm Connector card, determines their quality for use by the system, and selects the most appropriate input signal to use as the active reference. During normal operation, the active clock tracks the active input signal, and produces a precise frequency for the Output Driver cards based on the input reference. The standby clock does the same thing except its output is not used by the Output Driver cards. The standby clock backs up the active clock, ready to become active when necessary.

If the input reference is disqualified, the Clock card selects another qualified input signal as the reference. If no input references are qualified, the Clock card goes into holdover, using its own oscillator as the system reference.

For detailed information on Clock cards, see Clock Cards, on page 44.

Management Card

The Management card manages alarms to and from the TimeHub 5500, and provides local and Ethernet LAN communication interfaces. The TimeHub can operate without a Management card installed, but you will lose any communications abilities, alarms, and the Passthrough feature.

If an alarm condition occurs, the Management card determines whether the alarm state is critical, major, or minor, actuates the corresponding alarm relays, causes the appropriate LEDs to light, and generates TL1 alarm message(s) via the local or LAN communication interface. For more detailed information on the Management card, see Management Card, on page 48.

Output Driver Cards

Output Driver cards provide non-protected or protected DS1 or CC outputs. A single Output Driver card provides 40 non-protected outputs. Two Output Driver cards functioning as a pair provide 40 protected outputs. An Output Driver card can provide either 20 DS1 and 20 CC outputs or 40 of either type. The Output Connector modules installed on the rear panel of the shelf determine the type of output signal. Output Driver Cards, on page 50, describes the Output Driver cards in more detail.

24 TimeHub 5500 User’s Guide 097-55501-02 Issue 8 – February 2005

Chapter 1 Description

Alarms

Specific capabilities of the Output Driver card include:

 Drive up to 40 outputs (40 DS1, 40 CC, or 20 CC and 20 DS1)

 DS1 framable D4 or ESF, with full SSM support for ESF

 Selective enable for every port

 Controllable CC cable delay compensation. Each port can have delay

compensation enabled or not. Each group of 20 ports (1-20 and 21-40) can have a specific delay amount applied.

Output Connector Modules

There are two types of Output Connector modules: DS1 and CC Output Connector modules. Each module contains the hardware required to interface with the output type (DS1 or CC). The Output Driver card reads the Output Connector module to determine the appropriate voltage levels, frequency, and format for the corresponding output type. See Output Connector Modules, on page 54, for more information on Output Connector modules.

Connection Panels

Timing output connections between the TimeHub 5500 and network elements are made at the wire-wrap connection panel. Each high-density wire-wrap connection panel can accommodate up to 160 outputs.

Alarms

Alarms are indicated by shelf and card status LEDs, and TL1 messages are reported via the local or LAN communication interface. In addition, contact closures provide for remote indication of alarms on the shelf.

There are two types of alarms associated with the TimeHub 5500: shelf and system. A shelf alarm is one that occurs from within the TimeHub shelf, and a system alarm is one that is sensed via one of the external alarm wire-wrap inputs on the input/ alarm card. If an alarm is sensed on any of these 10 external alarm inputs, it appears as a “System” alarm on the Management card front panel.

If simultaneous alarms occur with different severity levels, the front panel LEDs indicate only the one with the highest severity. For example, if both MAJOR and MINOR shelf alarms are present, only the MAJOR alarm LED is lit in the “Shelf” alarm row. In this case, if the MAJOR alarm ends, then the MINOR alarm LED lights (assuming that the source of that alarm is still present) since this is now the highest severity shelf alarm.

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Chapter 1 Description Synchronization Status Messaging

If there is a MAJOR shelf alarm and a MINOR system alarm (any of the external alarms in 7 to 10 range) then the MAJOR LED is lit for the shelf alarm row and the MINOR LED is lit for the system alarm row. In other words, it is possible to have alarm LEDs of different severity illuminated if one is a shelf alarm and the other a system alarm.

In all cases, all current alarms are reported via the TL1 command interfaces (serial and network) and can be retrieved at any time using the RTRV-ALM query (see the TL1 Reference Guide). If there are multiple alarms of the same and different severity, all are included in the RTRV-ALM response.

Alarm Connections

You make all alarm connections on the Input/Alarm Connector module at the rear panel of the shelf.

Contact Closure Inputs

Ten sets of contact closure inputs are provided to connect to relay outputs of equipment external to the shelf. Four of these input sets are Universal, and six are contact closure only.

Contact Closure Outputs

Contact closure outputs are provided to actuate visible and/or audible alarm indicators to inform the office of an alarm condition within the shelf.

Note: Contact closure outputs are generated by the Management card. The Management card must be installed in order to generate contact closure alarms or TL1 messages.

There are two sets of wire-wrap pins for Audible and Visual alarms; each set allows you to make connections for Minor, Major, and Critical alarms. For more information on the Input Connector card, see Installing the Input/Alarm Connector Module, on page 78.

Synchronization Status Messaging

The TimeHub 5500 supports input and output SSM (Synchronization Status Messaging). SSM provides a method for providing clock quality information to any equipment that uses synchronization inputs. For DS1 signals, SSM information can be encoded on ESF (Extended Super Frame) signals. D4 (also known as SF) DS1 signals are not capable of transporting SSM. You can use SSMs to automatically switch the input reference to the next-best available signal if the current input reference becomes unavailable.

26 TimeHub 5500 User’s Guide 097-55501-02 Issue 8 – February 2005

Synchronization Status Messaging

Chapter 1 Description

The relationship between SSM quality level and the meaning attached to each level is listed in Table 1-1.

Table 1-1. SSM Quality Level and Meaning

Description Quality Level Abbreviation

Stratum 1 Traceable 1 PRS

Synchronized – Traceability Unknown 2 STU

Stratum 2 Traceable 3 ST2

Transit Node Traceable 4 TNC

Stratum 3E Traceable 5 ST3E

Stratum 3 Traceable 6 ST3

SONET Minimum Clock Traceable (20 ppm clock) 7 SMC

Stratum 4 Traceable 8 ST4

DO NOT USE for synchronization 9 DUS

Reserved 10 RES

Input SSMs

The TimeHub 5500 provides several input-related SSM capabilities. You can provision the TimeHub 5500 to read the SSM value associated with any input. You can then use that value to determine which input becomes the active reference signal. If an input does not have an SSM value associated with it (such as a D4framed DS1 input or a 5/10 MHz input), you can assign an SSM value to the input.

The TimeHub can extract and report the encoded SSM value on any of the timing inputs using the TL1 keyword CURRSSM. This keyword allows you to retrieve the SSM value currently associated with a selected input. The value returned is the Quality Level in Table 1-1. For detailed syntax, see the description of this keyword in the TimeHub 5500 TL1 Reference Manual.

If the input does not support SSMs (for example, D4 framed DS1 and 5/10 MHz inputs), you can assign an assumed SSM value to the input using the TL1 keyword QLEVEL. Assigning an SSM allows an input to be automatically selected when the synchronization mode is set to SSM.

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Chapter 1 Description Synchronization Status Messaging

Automatic Reference Switching

You can use the SSM values on the input signal to determine which input is selected as the active timing reference. The TL1 keyword SYNCMDE provides this control. SSM is one of the four possible SYNCMODE setting; when SSM is selected, the CURRSSM value is the primary factor for selecting which input becomes the active reference (the input must be otherwise qualified for use to be selected). For more details on setting the sync mode, see Provisioning Inputs on a Master Shelf, on page 121.

Three factors determine how the TimeHub selects the active timing reference from the available qualified input signals:

1. Quality Level, which is either read directly from the SSM on the input signal, or is assigned using the TL1 keyword QLEVEL. There is no preference given to an input that is actually extracting SSM values (requires enabling SSMENB) compared with one that is using an assumed SSM quality level (SSMENB disabled).

2. SSM Priority level, which you assign to each input using the TL1 keyword SSMPRI. For information on using these keywords and the syntax, see the TL1 Reference Guide.

3. The location of the reference signal on the Input panel; inputs on lower-numbered inputs have higher priority when the other two factors have the same value.

If the CURRSSM quality value for an otherwise qualified input is numerically higher than the quality level of the internal reference oscillator in the Clock card, that input will be disqualified and hence cannot be selected as the active timing reference. The rationale for this is that the internal reference oscillator will provide a better timing reference than any input with a lower quality level. The quality levels for TimeHub 5500 internal oscillators are 3 for any rubidium type clock (090-55513-01 and 090-55514-02) (Stratum 2 traceable) and 5 for any quartz type clock (090-55511-01 and 090-55512-02) (Stratum 3E traceable). The QCUTOFF keyword can be used to set an additional quality value that will disqualify any input whose CURRSSM value is higher than the selected QCUTOFF value.

Output SSMs

SSMs are automatically encoded onto any DS1 output set for ESF framing. Normal operation automatically encodes an appropriate SSM quality level on such outputs; you can override the automatic setting and manually set the quality level to be encoded on DS1 ESF outputs. Here are some details regarding how the SSM quality level is set for ESF outputs:

28 TimeHub 5500 User’s Guide 097-55501-02 Issue 8 – February 2005

Chapter 1 Description

Passthrough Mode

During normal operation, where a qualified input is being used as the active timing reference, the SSM quality level of that input is included on all DS1 ESF outputs. This quality level can be read by retrieving the CURRSSM value for the currently active timing reference. If the active reference changes to a different input, the SSM output changes to that of the newly selected input. Note that the SSM value is output on DS1 ESF outputs regardless of the selected synchronization mode (see SYNCMDE discussion above). It isn't necessary for SYNCMDE to be set to “SSM” for outputs to encode SSM information.

When the TimeHub 5500 is using an internal oscillator as the timing reference source, the output SSM quality level is the quality level associated with the performance level for that internal oscillator. For the rubidium clocks (090-55513-01 and 090-55514-02) (Stratum 2 traceable), the quality level is 3. For the quartz clocks (090-55511-01 and 090-55512-02) (Stratum 3E traceable), the quality level is 5.

The TimeHub uses the quality level associated with the Clock card in the following situations:

 After warming up, the Clock card enters the Freerun mode (indicated by an LED

on the front panel) while input references are being qualified. During this time the internal oscillator on the active Clock card is the active timing reference.

 If for some reason all external timing references become disqualified (for

example, signal is lost), the TimeHub 5500 enters either Freerun or Holdover mode (indicated by an LED on the front panel). In either mode, the active Clock card becomes the active timing reference. If external timing references later become re-qualified, the TimeHub 5500 returns to normal operation and the output SSM quality level changes to match that of the selected input.

You can manually set the output SSM quality level on DS1 ESF outputs using the OMANSSM (Output Manual SSM) keyword. This allows you to select a specific SSM quality level to be output on all channels in an Output card. By enabling OMANSSM (set to “Y”) for a particular output card, any DS1 ESF outputs associated with that card outputs the quality level set via the OQLEVEL (Output Quality Level) keyword. A primary reason for providing this capability is to allow information such as “DON'T USE for synchronization” (quality level 8) to be sent to downstream equipment during maintenance operations. Using a signal marked DUS for timing purposes is a violation of the BITS concept and Telcordia general requirements.

Passthrough Mode

The TimeHub 5500 can provide a usable clock in a situation where both Clock cards are removed from the shelf. The capability is called Passthrough and resides on the TimeHub Management card. The Management card has a connection to the timing inputs, which it continually monitors for signal presence. An LED on the Management card indicates when the Passthrough mode is active. An automatic TL1 message is also provided on both communication ports whenever Passthrough operation begins or ends.

097-55501-02 Issue 8 – February 2005 TimeHub 5500 User’s Guide 29

Chapter 1 Description Passthrough Mode

Passthrough is available only when a Clock card has qualified at least one input since power was applied to the Management card. The Management card monitors the Clock cards for qualified inputs; if no qualified input has been detected, Passthrough will not enable upon removal of Clock cards. When the Management card has determined that Passthrough is ready, an automatic message, PTAVAIL, is issued. You can check if Passthrough is available by using the TL1 keyword RTRV-COND. See the TL1 Reference Guide for more information.

When Passthrough mode is activated, the following hierarchy determines which input is selected as the reference:

 The first choice is the most recently selected input reference prior to removal of

the Clock card.

 If the first choice is not available (due to loss of signal), Passthrough is then

selected from the inputs previously qualified by the Clock card prior to its removal. The attempt begins with the lowest numbered input.

 If no recently qualified input is available, Passthrough is selected from any other

input that is providing a signal. The selection attempt starts with the lowest numbered input.

For example, if inputs 1, 3, and 4 had been qualified by the active Clock card and input 3 was the active reference just prior to removal of the Clock card:

 Input 3 is the first choice; if it is not providing a signal, then

 Input 1 is the next choice since it had been qualified by the clock and it is the

lowest numbered such input. If it is not providing a signal, then

 Input 4 is the next choice since it had been qualified and is the next lowest

numbered such input. If Input 4 was selected and it goes away, Passthrough cycles through the set of previously qualified inputs, in case one has returned.

 If none of the qualified inputs are available, Passthrough searches the remaining

inputs for a signal. In this example, the only remaining inputs are 0 (the 5/10 MHz input) and 2 (DS1 input). Starting with 0, if an input is detected, it is selected as the active reference.

If no timing input is providing a signal while in Passthrough, the outputs are disabled and Passthrough mode ends. Unlike Clock cards, which have the ability to provide holdover capability when all timing inputs are removed (and thus maintain output timing), the Management card cannot provide holdover. Therefore, outputs are disabled if there is no timing input when in Passthrough mode.

30 TimeHub 5500 User’s Guide 097-55501-02 Issue 8 – February 2005

Chapter 1 Description

Passthrough Mode

Passthrough Considerations

There are several restrictions and special considerations that apply to Passthrough operation:

 Brief phase hits on the outputs are likely when entering and exiting Passthrough

mode

 You cannot configure the Clock or outputs while in Passthrough mode

 Passthrough does not have the capability to reject inputs with excessive jitter or

that are significantly off frequency.

 Passthrough does not filter input-to-output in the same way as a Clock card, so

out-of-mask timing (for example, TDEV and MTIE) is possible.

Firmware Versions and Passthrough Operation

Details of the Passthrough capability depend upon the firmware and hardware versions of the Management (090-55542-01), Clock (090-5551x-xx), and Expansion Controller (090-55545-01) cards. See the note at end of this section for how to check firmware and hardware versions.

If either the Management or Clock cards contain firmware prior to 4315B or have hardware version A, then the passthrough capability is as follows:

 Passthrough functions only if the shelf is configured as a master system.

Passthrough will not function if the shelf is configured as a remote system.

 There are likely to be brief phase-hits on the outputs when entering and exiting

Passthrough mode.

 If an Expansion shelf is connected to the Master it also will operate in

Passthrough mode.

If the Management and Clock cards contain firmware version 4315B or later AND have hardware revision B or later, then the Passthrough capability is as follows:

 Passthrough functions when the shelf is configured as either master or remote.

As should be expected, for a remote shelf the timing references must be CC1 inputs. For a master shelf the timing references must be DS1 or 5/10 MHz inputs.

 Phase-alignment between input and output is maintained during the transition

into Passthrough from normal operation, while in Passthrough, and during the exit from Passthrough back to normal operation.

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Chapter 1 Description Master/Remote Shelf

While this feature applies to both Master and Remote shelves, the easiest way to understand it is to consider a Remote shelf that is timing a CC input prior to entering Passthrough mode. Prior to Passthrough mode, the alignment of the active CC input and any output CC will be nearly perfect. If you observed the positive bi-polar violations on the input and any CC output on an oscilloscope, you would see that they are completely aligned. The Passthrough feature maintains this alignment while entering into Passthrough, while in Passthrough, and when exiting from Passthrough back to normal operation (which would occur when a Clock card is re-inserted). Thus, the phase alignment between input and output is never lost during the entire Passthrough episode.

If an Expansion shelf is connected, it also operates in Passthrough mode, but its behavior depends on the firmware revision of the Expansion Controller cards:

 If an Expansion Controller card contains version A firmware, outputs from that

Expansion shelf do not maintain the pre-Passthrough phase-alignment while in Passthrough mode of operation.

 If an Expansion Controller card contains version B (or later) firmware, outputs

from that Expansion shelf will maintain pre-Passthrough phase-alignment while in Passthrough mode of operation.

Note: Since Passthrough is not a normal operating mode, it should not be routinely used. It is intended to provide a mechanism to “keep alive” the outputs in a situation when both Clock cards are inadvertently removed. The timing performance when in Passthrough mode cannot be assured.

Master/Remote Shelf

The TimeHub 5500 can be configured for use as a Master shelf or as a Remote shelf. The essential difference between these configurations is that a Master shelf accepts PRS (5 or 10 MHz) and DS1 inputs as timing references while a Remote shelf accepts Composite Clock (CC) inputs as the timing reference(s). Typically, a Remote shelf takes its CC timing inputs from a TimeHub or DCD master shelf, both which are capable of providing CC outputs.

The Remote shelf provides the same output distribution capability that is provided by a Master shelf. The Passthrough capability is available in the Remote shelf with R4315B or later firmware.

For information on configuring a shelf as a Master or Remote, see Configuring the

Shelf as a Master or Remote, on page 72.

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Chapter 1 Description

Master/Remote Shelf

Remote Shelf Capability

The TimeHub Remote shelf can be located up to 3000 feet (1093 m) from the Master shelf that provides the CC timing inputs. The Clock cards in the Remote shelf closely follow the input CC signals; this maintains phase alignment between the CC inputs and CC outputs. Unlike a Master shelf, which provides significant filtering of the input timing references (PRS or DS1 signals), the Remote shelf adjusts its outputs very quickly as changes occur on the CC inputs. Since the input CCs are being distributed from a Master shelf that has already performed the desired filtering on its inputs, only small timing variations are expected at the Remote shelf inputs.

The Remote shelf does not provide performance monitoring data, which is available for the PRS and all DS1 inputs on a Master shelf. For more information on performance monitoring, see the TL1 Reference Guide (097-55501-02).

In addition to accepting up to two CC signals as timing references, the Remote shelf can accept up to two DS1 inputs which are used to extract SSM information only.

Note: The DS1 lines extract only the SSM messages and do not extract synchronization signals.

A typical setup for a Master/Remote shelf combination includes:

 Two CC outputs are taken from a Master shelf connected as CC inputs to the

Remote shelf. Two outputs are used for redundancy; to isolate the signal paths as much as possible, you can take each CC signal from a different output group on the Master shelf (for example, one from the “C” group and another from the “D” group). You compensate for the delay due to the cable length from the Master shelf using the CCDEL and CCDENB keywords. The preferred method is to compensate for the delay at the Master shelf.

 Two ESF-framed DS1 outputs from different output groups on the Master shelf

are connected to the first two DS1 inputs on the Remote shelf. This provides a redundant method for the remote shelf to receive SSM information from the Master shelf.

Operational Specifics

This section describes the capabilities of the Remote shelf that are not available on a Master shelf. The TimeHub Clock cards are designed to operate in either a Master or Remote shelf configuration. When configured for Remote operation, the Input LEDs on the front panel of the Clock card display information for the inputs. See

Figure 2-2

which shows the front panel of the Clock card. The relevant LEDs are CC 1 and 2 and DS1 1 and 2.

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Chapter 1 Description Master/Remote Shelf

CC Timing Inputs

Timing references for the Remote shelf are connected at the Input/Alarm Connector module, located on the rear panel of the shelf (refer to Figure 3-17). This module supports both Master and Remote operation. For Remote operation, the available timing inputs are labeled CC IN 1 and CC IN 2. Typically a TimeHub or DCD master shelf provides these signals.

DS1 SSM Inputs

Composite Clock input signals do not provide SSM information that can be included on Remote output signals. You can connect ESF-framed DS1 inputs to a Remote shelf in order to receive encoded SSM information from the Master shelf. The Remote shelf then passes the SSM information on to the outputs. The sole function of these DS1 inputs is for SSM decoding; they are not used as timing references.

SSMs in a Remote Shelf

Table 1-2 describes how the source of SSM is determined in a Remote shelf for a

variety of conditions. Other than the special case where the OMANSSM keyword is used to manually set the output SSM value (see TimeHub TL1 Reference Guide for details), the SSM source determines the SSM that is encoded on each ESF-framed DS1 output generated on the Remote shelf.

Table 1-2. SSM Source Determination for Remote Shelf

Condition SSM Source

Shelf has no active timing reference (“A” is not lit in either CC1 or CC2 row).

Shelf has at least one active timing reference ("A" is lit in either CC1 or CC2 row).

There are no valid SSM inputs. (No signal/or non-decodable signal connected to DS1-1 and DS1-2) OR neither SSM input is enabled ("E" LED not lit in both DS1-1 and DS1-2 rows).

Shelf has at least one active timing reference ("A" is lit in either CC1 or CC2 row)

There is a single valid SSM input (“E”, “Q”, and “A” lit on one DS1 input, Q is not lit on the other one)

Shelf has at least one active timing reference ("A" is lit in either CC1 or CC2 row)

Both DS1-1 and DS1-2 are decoding valid SSM information ("E" and "Q" are lit for both DS1-1 and DS1-2 rows). Only one of these rows can indicate "A".

The SSM value is that of the internal oscillator in the active Clock card (see HFQLEVL keyword in the

TL1 Reference Guide

The SSM value is taken from the “assumed” SSM value (see QLEVEL keyword in the TL1 Reference Guide) associated with the active timing reference. For example, if CC2 is the active timing reference, the SSM is taken from QLEVEL setting for channel 11 (Channel 11 is the TL1 reference to CC2).

The SSM value is being decoded from the DS1 input that is showing “E”, “Q”, and “A”.

The SSM value is taken from the DS1 input that has the higher PRIORITY (lower numerical value) setting. This is the one that has “A” lit. See the TL1 Reference Guide for details on PRIORITY keyword.

34 TimeHub 5500 User’s Guide 097-55501-02 Issue 8 – February 2005

Expansion Shelf

For situations requiring more outputs than can be provided by a Master shelf, the TimeHub 5500 supports one to four Expansion shelves. Each Expansion shelf provides up to 320 protected inputs; using four expansion shelves, a TimeHub system can provide a total of 1420 outputs.

Note: In order to support Expansion shelves, the Master shelf must be equipped with Extended-Capacity Clock cards, as described in

Clock Cards, on page 23. Standard Clock cards do not support

Expansion shelves.

Figure 1-4 illustrates the Expansion shelf. There are two types of plug-in cards used

with an Expansion shelf: Output Driver cards (p/n 090-55581-01) and Expansion Controller cards (p/n 090-55545-01). Two types of Output Connector modules provide DS1 or CC outputs.

Chapter 1 Description

Expansion Shelf

Figure 1-4. TimeHub 5500 Expansion Shelf – Front View

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Chapter 1 Description Expansion Shelf

Output Driver Cards

The Expansion shelf uses the same Output Driver cards used on the Master shelf (see the following Note). Each Output Driver card provides 40 outputs, which can be provisioned as all DS1, all Composite Clock (CC), or 20 outputs of each type. The front-panel LEDs indicate the actual provisioning. The Output Connector modules installed on the rear panel of the Expansion shelf determine the type of output signal.

The Output Driver cards are paired to provide a redundant protection scheme. The cards work together such that if either card experiences a failure the output integrity is maintained. When cards are paired, inserting or removing either card has negligible impact on output timing or signal integrity. The Expansion shelf supports 16 Output Driver cards, arranged in groups labeled “A”, “B”, …, “H”.

Note: Output Driver cards (p/n 090-55581-01) with firmware version R4114C do not function properly in Expansion shelf slot 16H (the output card slot farthest to the right). Output Driver cards with this firmware version function properly in every other output card slot in the Expansion shelf.

Inserting an Output Driver card having this firmware version in slot 16H does not affect service but the card will continually reset itself and not become operational.

A firmware upgrade is available to allow such Output Driver cards to become usable in slot 16H. Contact Symmetricom Global Services (SGS) for details. Output Driver cards with firmware revision 4209A and higher function properly in every slot in the Expansion shelf.

Specific capabilities of the Output Driver card include:

 Drive up to 40 outputs (40 DS1, 40 CC, or 20 CC and 20 DS1)

 DS1 framable D4 or ESF, with full SSM support for ESF

 Selective enable for every port

 Controllable CC cable delay compensation. Each port can have delay

compensation enabled or not. Each group of 20 ports (1-20 and 21-40) can have a specific delay amount applied.

For more detailed information on the Output Driver cards, see Output Driver Cards, on page 50.

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Chapter 1 Description

Expansion Shelf

Expansion Controller Card

The Expansion Controller card (090-55545-01) is used only in an Expansion shelf. At least one Expansion Controller (EC) card is required for the Expansion shelf to function properly. An EC card can be inserted in the leftmost (EC1) or rightmost (EC2) slot on the Expansion shelf (see Figure 1-4). You can install two EC cards in the shelf for redundancy; if one card should fail, the other maintains proper operation.

The EC card provides the following basic functionality:

 Buffering of timing and framing signals sourced by Clock cards in the master

shelf, and delivery of those signals to the Expansion shelf output cards.

 Communication (bi-directional) between Master and Expansion shelves.

 Expansion shelf power monitoring and alarm reporting

 Redundancy management

 Signal integrity monitoring

Rear Panel of the Expansion Shelf

The rear panel of the Expansion shelf contains the following connectors:

Expansion Link – There are four 25-pin connectors along the top of the rear panel: two (in and out) for Link 1 and two (in and out) for Link 2.

Output Connector Modules – These modules define the output signal type (DS1 or CC) for outputs driven by Output Driver cards inserted in the front panel of the shelf. The Expansion shelf can accept up to 16 Output Connector modules (of either type), each providing 20 outputs of the selected type.

Power – There are redundant power connections: A and B.

Expansion Output Connector Modules

Two types of Output Connector modules are available for the Expansion shelf. One type provides 20 DS1 outputs (090-55591-02); the other provides 20 CC outputs (090-55593-02). These modules are similar in design to the Output Connector modules used on the Master shelf, but the form factor of the Output Connector modules is different for Expansion shelves. These cards are described in Output

Connector Modules, on page 54.

There are two cables available for connecting Output Connector modules in the Expansion (or Master) shelf to the wire-wrap panels.

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Chapter 1 Description Expansion Shelf

1. A flat ribbon cable (060-55591-01) connects a TimeHub Output Connector

module to the 80-output wire-wrap panel (090-41902-01).

2. A round cable (060-55591-02) connects a TimeHub Output Connector module to

the 160-output high-density wire-wrap panel (090-55595-01). This cable reduces cabling congestion that could be associated with wiring for the 320 outputs available on the Expansion shelf. Each output module (990-5559x-02) includes this cable. Note that the round cable/high-density wire-wrap panel combination can be used with either a Master or Expansion shelf. This wire-wrap panel is delivered with the Expansion shelf.

The cable connection from the Output Connector module is the same (form factor and pinout) on the Master and Expansion shelf Output Connector modules, so cabling used to connect Master shelf outputs to a wire-wrap panel will also work on an Expansion shelf.

The Master shelf (990-55505-01) includes one high-density wire-wrap panel (groups A through D) and the Expansion shelf (990-55505-02) includes two high-density wire-wrap panels (groups A through D and groups E through H). Additional wire-wrap panels can be ordered separately; see Ordering and Parts List, on page 59.

Output Driver Cards and Output Connector Modules

Each Output Driver card is associated with its Output Connector card by the letter groups (A through H) on the front and rear panels. Each letter group has two Output Driver card slots and two Output Connector module locations. The two Output Driver card slots are redundant; if two cards are installed and one is disabled, the other card maintains the outputs. The two Output Connector cards are not redundant; each card supports 20 output channels.

Two Output Connector cards are required to support the 40 outputs generated by the Output Driver card. The upper (top) module provides outputs 1 through 20 for that particular letter group, and the lower module provides outputs 21 through 40 for that same letter group. If 20 or fewer outputs of the same type are desired, there is no need to load both Output Connector module locations.

The Output Driver cards have LEDs that indicate when an associated Output Connector module is installed on the rear panel of the shelf. Indicators are provided for ports 1 through 20 and ports 21 through 40. If neither the CC nor DS1 LED is lit, then an Output Connector module is not installed.

Redundancy Considerations

The interconnections between the Master and Expansion shelf are designed to support redundancy in several areas. Each area is independent of the others; if one type of redundancy is lost the other areas of redundancy are not compromised.

38 TimeHub 5500 User’s Guide 097-55501-02 Issue 8 – February 2005

Chapter 1 Description

Expansion Shelf

Clock Redundancy

The two Clock cards in the Master shelf provide the Expansion shelf with clock timing, framing, and communication. If either Clock card is removed, the Expansion shelf continues to receive the necessary signaling from the other Clock card. This is essentially the same way Clock cards provide redundant timing to Output cards on a Master shelf; the redundant clock signaling is conveyed between shelves via the link cables.

Link Cable Redundancy

Each link cable conveys identical information from the master shelf to the Expansion shelf. Master shelf CLK1 and CLK2 signaling is present on both link cables; if one link is broken, the Expansion shelf can still receive timing from the Clock card(s) installed in the Master shelf.

Expansion Controller Card Redundancy

Each EC card receives complete signaling information from both link cables. When both links are present, each EC card is receiving two sets of identical signaling. If either EC card is removed, the remaining EC card provides all of the necessary signaling between the output cards in the Expansion shelf and the clocks in the Master shelf.

Output Driver Card Redundancy

Each Output Driver card in an Expansion shelf slot-pair (“A”, “B”, …, “H”) receives clocking information from the Clock card(s) installed in the Master shelf. If both Clock cards are installed in the Master shelf, then each Output card receives clocks from each, with preference given to the active Clock (as indicated by the Active LED on the Clock card). Only one Output card per letter group is needed to create output signals. Adding a second Output card to the letter group provides protection if either Output card fails.

Communicating With the Expansion Shelf

The TimeHub Master shelf automatically attempts to communicate with the EC card(s) in an Expansion shelf. When they respond, the Master shelf sets the TL1 keyword ECLKEXP for the cards to Y. The Master shelf then reports alarms or events related to that Expansion shelf. If no EC cards are present, the ECLKEXP remains at the default value of N. When ECLKEXP is N, the TimeHub Master shelf does not expect communication from an EC card and no Expansion shelf-related events are reported. This keyword is described in the TL1 Reference Guide.

If one of the EC cards is removed, an event (keyword EXCLKGONE) is reported indicating that this card is missing. When the card is reinstalled, the event clears.

If you permanently remove an Expansion shelf from a TimeHub system, manually set the value of ECLKEXP for the targeted EC card(s) to N. Any events associated with the EC card will be cleared.

097-55501-02 Issue 8 – February 2005 TimeHub 5500 User’s Guide 39

Chapter 1 Description TimeScan THC Software

TimeScan THC Software

The TimeHub 5500 is delivered with a software application called TimeScan THC. This application is a craft graphical user interface (GUI) that provides a point-andclick interface for configuring and maintaining the TimeHub 5500. Chapter 4, Testing

and Configuring the TimeHub contains procedures that use TimeHub THC. Use the

built-in Help system in TimeHub THC to answer questions regarding its use.

40 TimeHub 5500 User’s Guide 097-55501-02 Issue 8 – February 2005

Chapter 2 Engineering & Ordering Information

Chapter

This chapter includes:

 Overview

 Wire-wrap Panels

 Card Overview

 Ordering and Parts List

 User-Supplied Tools and Materials

097-55501-02 Issue 8 – February 2005 TimeHub 5500 User’s Guide 41

Chapter 2 Engineering & Ordering Information Overview

Overview

This chapter describes the cards and accessories available for the TimeHub 5500.

If any difficulties are encountered during the installation process, contact Symmetricom Global Services. Refer to Technical Assistance, on page 185 for telephone numbers. Global Services includes Product Technical Support for technical information, and Customer Service for information about an order, RMAs, and other information.

Wire-wrap Panels

Symmetricom provides several wire-wrap adapter panels to connect the TimeHub 5500 to office wiring. Figure 2-1 illustrates the High-Density Wire-wrap Adapter Panel that is delivered with the shelf; Table 2-1 lists the available wire-wrap adapter panels and their part number. The cabling to the panel is supplied with the Output Connector module (see Output Connector Modules, on page 54).

Figure 2-1. Front and Rear of the High-Density Wire-wrap Adapter Panel

42 TimeHub 5500 User’s Guide 097-55501-02 Issue 8 – February 2005

Chapter 2 Engineering & Ordering Information

Wire-wrap Panels

Other panels may be used with the TimeHub when you use appropriate interconnecting cables (see Table 2-2). Contact your Symmetricom representative or Symmetricom Global Services to obtain the proper cables.

Table 2-1. Wire-Wrap Panels Available for the TimeHub 5500

Description Part Number

High capacity wire-wrap panel labeled A-D

093-55595-01

for Master/Remote shelves

High capacity wire-wrap panel labeled A-D

093-55595-01

for Expansion shelves

High capacity wire-wrap panel labeled E-H

093-55595-02

for Expansion shelves

Table 2-2. Wire-Wrap Connection Cables

Description Part Number

4-foot (122 cm) interconnect cable 060-55591-02

10-foot (305 cm) interconnect cable 060-55591-10

20-foot (710 cm) interconnect cable 060-55591-20

Symmetricom also offers cable management kits made of ABS plastic to ensure a neat installation. These kits are available in 1 RU and 2 RU heights to meet a variety of installation needs.Table 2-3 lists the cable management kits available. Each of these kits includes two cable trays used for a single wire-wrap adapter panel.

Table 2-3. Cable Management Panels Available for the TimeHub 5500

Description Part Number

Cable management kit, 1 RU 093-55595-11

Cable management kit, 2 RU 093-55595-12

097-55501-02 Issue 8 – February 2005 TimeHub 5500 User’s Guide 43

Chapter 2 Engineering & Ordering Information Card Overview

Accessories

Symmetricom provides a range of accessories to ensure a complete and professional installation. Table 2-4 lists the available accessories.

Table 2-4. Accessories for Adapter Panels

Description Part Number

Blank panel for Clock card 093-55598-01

Blank panel for Output Driver card 093-55598-02

Blank panel for Expansion Controller card 093-55598-03

Blank panel for Output module – Master chassis

Blank panel for single Output module – Expansion chassis

Blank panel for two Output modules – Expansion chassis

Card Overview

This section describes the cards available for the TimeHub 5500.

Clock Cards

The function of the Clock cards in the TimeHub 5500 is described in Clock Cards, on page 23.

 Standard Clock cards: These cards are equipped with five inputs (four DS1 and

one 5/10 MHz) and do not support Expansion shelves).

093-55599-01

093-55599-02

093-55599-03

– Five-input with an ST2E rubidium oscillator (090-55513-01)

– Five-input with an ST3E quartz oscillator (090-55511-01)

 Extended-capacity Clock cards: These cards are equipped with nine inputs (four

– Nine-input with an ST2E rubidium oscillator (090-55514-02)

– Nine-input with an ST3E quartz oscillator (090-55512-02)

44 TimeHub 5500 User’s Guide 097-55501-02 Issue 8 – February 2005

Chapter 2 Engineering & Ordering Information

Figure 2-2 illustrates the front panel of the Clock card.

Card Overview

Figure 2-2. Front Panel of the ST2-Rb Clock Card

097-55501-02 Issue 8 – February 2005 TimeHub 5500 User’s Guide 45

Chapter 2 Engineering & Ordering Information Card Overview

The LED status indicators on the Clock card are described in Figure 2-5.

Table 2-5. Clock Card Front Panel Indicators

Indicator Color Description

Power Green

Fuse Red

Alarm Red

Fail Red

Warmup Amber

Freerun Red

Tracking Green

Fast Track Green

 On = The Clock card is receiving power  Off = No power present

 On = The Clock card fuse is open  Off = The Clock card fuse is not open

 On = An alarm condition is present  Off = No alarm condition is present

 On = A hardware or firmware fault has occurred  Off = No hardware or firmware faults have occurred

 On = Clock card is in Warmup state  Off = Clock card is not in Warmup state

 On = The Clock card is generating an output without

using tracking information from a reference source

 Off = The Clock card is not in Freerun state

 On = The Clock card is tracking a qualified input  Off = The Clock card is not tracking a qualified input

 On = The Clock card has warmed up, is tracking, and is

providing a usable output, but has not yet achieved Smart Clock (optimal quality) output

 Off = The Clock card is not in Fast Track state

SmartClock Available

Green

 On = The system has gathered sufficient information

during tracking to provide Smart Clock (optimal quality) holdover output if necessary

 Off = The system has not gathered sufficient information

during tracking to provide Smart Clock (optimal quality) holdover output if necessary

Holdover Green

 On = All inputs are lost or unacceptable, and the system

is now using the internal oscillator which is using recent tracking data from a qualified reference to provide the output

 Off = The system is not in Holdover state

Inputs E Green

 On = The associated reference input is enabled (E) for

tracking

 Off = The associated reference input is not enabled (E)

for tracking

46 TimeHub 5500 User’s Guide 097-55501-02 Issue 8 – February 2005

Chapter 2 Engineering & Ordering Information

Card Overview

Table 2-5. Clock Card Front Panel Indicators (Continued)

Indicator Color Description

Inputs Q Green  On = The associated reference input is qualified (Q) for

tracking

 Off = The associated reference input is not qualified (Q)

for tracking

Inputs A Green

Active Green

Standby Green

Force Active

– Pressing this button forces the Clock card to be the active

(pushbutton)

 On = The associated reference input is being actively (A)

used for tracking. In a remote system, this light indicates the shelf being

configured as a remote shelf. In this case, the corresponding ‘Q’ and ‘E’ lights are off

 Off = The associated reference input is not being

actively (A) used for tracking

 On = This card is the synchronization signal source for

all output cards

 Off = This card is not the synchronization signal source

for all output cards

 On = This card is generating an output that is

phase-locked to the output of the other (active) Clock card

 Off = This card is not generating an output that is

phase-locked to the output of the other (active) Clock card

card

097-55501-02 Issue 8 – February 2005 TimeHub 5500 User’s Guide 47

Chapter 2 Engineering & Ordering Information Card Overview

Management Card

The function of the Management card is described in Management Card, on page

24. The Management card kit (990-55542-01) includes the Management card, a DB9 cable, and a CD that contains the TimeScan THC software. Figure 2-3 illustrates the front panel of the Management card.

Figure 2-3. Front Panel of the Management Card

48 TimeHub 5500 User’s Guide 097-55501-02 Issue 8 – February 2005

The LED status indicators on the Management card are described in Table 2-6.

Table 2-6. Management Card Front Panel Indicators

Indicator Color Description

Chapter 2 Engineering & Ordering Information

Card Overview

Power Green

Fuse Red

Alarm Red

Fail Red

Shelf Power –48V

Red

A Fail

Shelf Power –48V

Red

B Fail

Alarms

Red

System Minor

Alarms

Red

System Major

Alarms

Red

System Critical

 On = The card is receiving power  Off = No power present

 On = The Management card fuse is open  Off = The Management card fuse is not open

 On = An alarm condition is present  Off = No alarm condition is present

 On = A hardware or firmware fault has occurred  Off = No hardware or firmware faults have occurred

 On = Input voltage is below the normal level  Off = Input voltage is at the normal level

 On = A minor alarm condition exists outside the shelf  Off = There is no minor alarm outside the shelf

 On = A major alarm condition exists outside the shelf  Off = There is no major alarm outside the shelf

 On = A critical alarm condition exists outside the shelf  Off = There is no critical alarm outside the shelf

Alarms Shelf Minor

Alarms Shelf Major

Alarms Shelf Critical

Audible Alarms Cutoff LED

Red

 On = A minor alarm condition exists in the shelf  Off = There is no minor alarm within the shelf

 On = A major alarm condition exists in the shelf  Off = There is no major alarm within the shelf

 On = A critical alarm condition exists in the shelf  Off = There is no critical alarm within the shelf

 On = An audible or visible alarm was present. The

audible alarm has been silenced, but the alarm condition still exists

 Off = The alarm cutoff function has not been activated

Audible Alarms

– Silences all audible alarms when pressed

Cutoff Pushbutton

Comm Ports Local Link

Comm Ports Local Logon

097-55501-02 Issue 8 – February 2005 TimeHub 5500 User’s Guide 49

Green

 On = The local communication port is enabled  Off = The local communication port is disabled

 On = A user is logged on the local port  Off = A user is not logged on the local port

Chapter 2 Engineering & Ordering Information Card Overview

Table 2-6. Management Card Front Panel Indicators (Continued)

Indicator Color Description

Comm Ports Local Xmit

Comm Ports Remote Link

Comm Ports Remote Logon

Comm Ports Remote Xmit

Output Driver Cards

Each Output Driver card (090-55581-01) supports 40 DS1 or Composite Clock outputs, and can be installed in either a Master/Remote shelf or in an Expansion shelf. The Master/Remote shelf contains eight slots for Output Driver cards, arranged in four groups labeled A through D. The Expansion shelf contains 16 slots for Output Driver cards, arranged in eight groups labeled A through H.

Green  On = Data is being transferred on the local port

 Off = Data is not being transferred on the local port

Green

 On = The network connection is enabled  Off = The network connection is disabled

 On = A user is logged on the network  Off = A user is not logged on the network

 On = Data is being transferred on the network  Off = Data is not being transferred on the network

Note: The “D” group on a Master/Remote shelf supports 20 protected or non-protected outputs. Groups A, B, and C support 40 protected or non-protected outputs.

To maintain outputs should an Output Driver card fail, you can install them in pairs within a group. If one Output Driver card in a group fails, then the other card maintains the outputs with minimal disruption. If you do not need protected outputs, you can install one Output Driver card in either slot of a group.

Figure 2-4 shows the front panel of the Output Driver card.

50 TimeHub 5500 User’s Guide 097-55501-02 Issue 8 – February 2005

Chapter 2 Engineering & Ordering Information

Card Overview

Figure 2-4. Front Panel of the Output Driver Card

097-55501-02 Issue 8 – February 2005 TimeHub 5500 User’s Guide 51

Chapter 2 Engineering & Ordering Information Card Overview

The LED status indicators on the Output Driver card are described in Table 2-7.

Table 2-7. Output Driver Card Front Panel Indicators

Indicator Color Description

Power Green

Fuse Red

Alarm Red

Fail Red

Ports 1–20

Green

DS1

Ports 1–20

Green

Ports 21–40

Green

DS1

 On = The card is receiving power  Off = No power present

 On = The Output Driver card fuse is open  Off = The Output Driver card fuse is not open

 On = An alarm condition is present  Off = No alarm condition is present

 On = A hardware or firmware fault has occurred  Off = No hardware or firmware faults have occurred

 On = A DS1 Output Connector module is connected to

ports 1 through 20

 Off = There is no Output Connector module connected

to ports 1 through 20; no outputs can be generated

 On = A CC Output Connector module is connected to

ports 1 through 20

 Off = There is no Output Connector module connected

to ports 1 through 20; no outputs can be generated

 On = A DS1 Output Connector module is connected to

ports 21 through 40

 Off = There is no Output Connector module connected

to ports 21 through 40; no outputs can be generated

Ports 21–40 CC

Green

 On = A CC Output Connector module is connected to

ports 21 through 40

 Off = There is no Output Connector module connected

to ports 21 through 40; no outputs can be generated

52 TimeHub 5500 User’s Guide 097-55501-02 Issue 8 – February 2005

Chapter 2 Engineering & Ordering Information

Card Overview

Input/Alarm Connector Module

The Input/Alarm Connector module (090-55561-01) mounts on the rightmost position on the rear panel of a Master/Remote shelf. The module is shown in Figure

2-5. Expansion shelves do not use an Input/Alarm Connector module.

Figure 2-5. Front Panel of the Input/Alarm Connector Module

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Chapter 2 Engineering & Ordering Information Card Overview

Output Connector Modules

The TimeHub 5500 can provide either Composite Clock (CC) or DS1 output signals. The Output Connector module determines the type of signal. You can install a combination of Output Connector module types to meet the needs at the site. Output Connector modules are not interchangeable between the Master/Remote shelf and the Expansion shelf.

Master/Remote shelf Output Connector modules:

 DS1: 990-55591-01

 CC: 990-55593-01

Expansion Shelf Output Connector modules:

 DS1: 990-55591-02

 CC: 990-55593-02

Output Connector modules on the Master shelf are distinguished by the handle on the card. Each DS1 Output Connector module is labeled “DS1” and has a black handle; each CC Output Connector module is labeled “CC” and has a blue handle.

Figure 2-6 illustrates the two types of Output Connector modules for the

Master/Remote shelf, and Figure 2-7 illustrates the Output Connector modules for the Expansion shelf. Output Connector modules for the Expansion shelf are distinguished only by part number; be sure that you install the appropriate module for your installation.

54 TimeHub 5500 User’s Guide 097-55501-02 Issue 8 – February 2005

Chapter 2 Engineering & Ordering Information

Card Overview

Figure 2-6. Output Connector Modules for the Master/Remote Shelf: DS1 (left) and CC (right)

097-55501-02 Issue 8 – February 2005 TimeHub 5500 User’s Guide 55

Chapter 2 Engineering & Ordering Information Card Overview

Figure 2-7. Output Connector Modules for the Expansion Shelf: DS1 (left) and CC (right)

You can install up to seven Output Connector modules on a Master/Remote shelf, and up to 16 Output Connector modules on an Expansion shelf. See Installing Rear

Panel Modules, on page 77, for instructions on installing Output Connector

modules; Making Signal Connections, on page 81, provides instructions on connecting the Output Connector modules to the Output panels.

Expansion Controller Card

The Expansion Controller card (090-55545-01) is only used in the Expansion shelf. At least one Expansion Controller (EC) card is required for the Expansion shelf to function properly. An EC card can be inserted in the leftmost (EC1) or rightmost (EC2) slot on the Expansion shelf (see Figure 2-8). The overall function of the EC card is the same regardless of which of these locations are used. The reason to use two EC cards in the shelf is entirely to support redundancy. If one card should fail, the other will maintain proper operation.

The EC card provides the following functions:

 Buffering of timing and framing signals sourced by Clock cards in the Master

shelf, and delivery of those signals to the Expansion shelf output cards.

56 TimeHub 5500 User’s Guide 097-55501-02 Issue 8 – February 2005

Chapter 2 Engineering & Ordering Information

 Communication (bi-directional) between Master and Expansion shelves.

 Expansion shelf power monitoring and alarm reporting

 Redundancy management

 Signal integrity monitoring

Card Overview

Front Panel Indicators

Figure 2-8 illustrates the front panel of the Expansion Controller card.

Figure 2-8. Front Panel of the Expansion Controller Card

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Chapter 2 Engineering & Ordering Information Card Overview

The LED status indicators on the Expansion Controller card are described in Table

2-8.

Table 2-8. Expansion Controller Card Front Panel Indicators

Indicator Color Description

Power Green

Fuse Red

Shelf Alarm Red

Fail Red

Shelf Power Green/Red

Expansion Links Green/Red

 On = The card is receiving power  Off = No power present

 On = The Expansion Controller card fuse is open  Off = The Expansion Controller card fuse is not open

 On = An alarm condition is present  Off = No alarm condition is present

 On = A hardware or firmware fault has occurred  Off = No hardware or firmware faults have occurred

 Green = Power is being successfully supplied to the

associated shelf power terminal (A or B)

 Red = Power is not being successfully supplied to the

associated power terminal

 Green = Proper timing, framing, and communication is

coming from the Master shelf

 Red = The link cable is attached but there is a problem

receiving either clock timing, clock framing, or communication from the Master shelf

 Off = The link cable is not connected, or the Clock

card(s) are in warmup mode

When the Shelf Alarm LED is red, an alarm condition is detected by the Expansion Controller card. The alarm is reported back through the Management card in the master shelf. Specific alarms detected are:

 Shelf Power A or B not detected. This illuminates the Alarm LED as well as

appropriate Shelf Power LED (red). Associated TL1 events are EXPWRA and EXPWRB (Expansion Power Fail on terminal A or B).

 The Expansion Controller card is receiving a good link but it is not associated

with its “preferred” master shelf clock.

The concept of a “preferred” Clock is used to better support redundancy. During normal operation, each Expansion Controller card takes its clock from a different Clock card. However, an Expansion Controller card can take its clock from either Clock card so it is not critical that an EC card get its clock from its preferred source. This alarm is reported simply to indicate the situation when this card is currently not getting its clock from the preferred source. Specifically:

58 TimeHub 5500 User’s Guide 097-55501-02 Issue 8 – February 2005

 An EC card inserted into the EC1 (leftmost) slot “prefers” to take its clock from

CLK1 (leftmost Clock card on the Master shelf). If it can obtain a valid link only by using CLK2, the alarm LED lights.

 An EC card inserted into the EC2 (rightmost) slot “prefers” to take its clock from

CLK2 (rightmost Clock card on the Master shelf). If it can obtain a valid link only by using CLK1, the alarm LED lights.

The leftmost Clock card and leftmost EC card are a preferred pair while the rightmost Clock card and rightmost EC card are a preferred pair.

Ordering and Parts List

Table 2-9 lists the basic components that comprise a Master or Remote shelf.

Table 2-9. Master and Remote Shelf Basic Components

Item Part Number Quantity Included Items

Chapter 2 Engineering & Ordering Information

Ordering and Parts List

Master shelf kit 990-55500-01 1

Management

990-55542-01 1

card kit

Clock cards 090-5551x-0x 1 (minimum)

2 (recommended)

 Master shelf (090-55501-03)  One Wire-wrap Input module

(090-55561-01)



One Wire-wrap panel (190-55595-01)

 19 in. and 23 in. mounting

hardware

 System manuals

 Management card

(090-55542-01)

 DB9 connection cable



CD with TimeScan THC and complete TimeHub documentation

Quartz clock cards:

 Quartz 5 input (090-55511-01)

Note: This clock does not support Expansion shelves.

 Quartz 9 input (090-55512-02)

Note: This clock supports Expansion shelves.

Rubidium clock cards:

 Rubidium 5 input (090-55513-01)

Note: This clock does not support Expansion shelves.

 Rubidium 9 input (090-55514-02)

Note: This clock supports Expansion shelves.

097-55501-02 Issue 8 – February 2005 TimeHub 5500 User’s Guide 59

Chapter 2 Engineering & Ordering Information Ordering and Parts List

Table 2-9. Master and Remote Shelf Basic Components (Continued)

Item Part Number Quantity Included Items

Output Driver cards

090-55581-01 1 (minimum)

2 (recommended) up to 8 per Master/ Remote

DS1 Output module kit

990-55591-01 1 (minimum)

2 (recommended) up to 7 DS1 and CC total per Master/Remote

CC Output module kit

990-55593-01 1 (minimum)

2 (recommended) up to 7 DS1 and CC total per Master/Remote

Blank panels for Output card spaces

093-55598-02 8 minus number of

installed Output cards

Table 2-10 lists the components of an Expansion shelf.

Table 2-10. Expansion Shelf Basic Components

 Output card (090-55581-01)

 DS1 Output module

(090-55591-01)

 Round RJ-21 cable

(060-55591-02)

 CC Output module

(090-55593-01)

 Round RJ-21 cable

(060-55591-02)

 Optional to fill out output card

space

Item Part Number Quantity Included Items

Expansion shelf kit

090-55505-02 1

 Expansion shelf (090-55505-03)



Wire-wrap panel (190-55595-01)



Wire-wrap panel (190-55595-02)

 Line terminator (190-55505-01) x 2  Gender changer (128-55505-01)  Connection cable (060-55505-01)

x 2

 19 in. and 23 in. mounting

hardware

 System manuals  CD with TimeScan THC and

complete TimeHub documentation

Expansion Controller card

Output Driver cards

090-55545-01 1 (minimum)

2 (recommended)

090-55581-01 1 (minimum)

2 (recommended)

 Expansion Controller card

(090-55545-01)

 Output card (090-55581-01)

up to 16 per Expansion shelf

60 TimeHub 5500 User’s Guide 097-55501-02 Issue 8 – February 2005

Table 2-10. Expansion Shelf Basic Components (Continued)

Item Part Number Quantity Included Items

Chapter 2 Engineering & Ordering Information

Ordering and Parts List

DS1 Output module kit for Expansion shelf

990-55591-02 1 (minimum)

2 (recommended) up to 16 DS1 and CC total per Expansion shelf

CC Output module kit for Expansion shelf

990-55593-02 1 (minimum)

2 (recommended) up to 16 DS1 and CC total per Expansion shelf

Blank panels for Output card spaces

093-55598-02 16 minus number of

installed Output cards

Table 2-11 lists the accessories and spare parts that can be ordered separately.

Table 2-11. Accessories and Spare Parts

Item Part Number Description

 DS1 Output module

(090-55591-02)

 Round RJ-21 cable

(060-55591-02)

 CC Output module (090-55593-02)  Round RJ-21 cable

(060-55591-02)

 Optional to fill out output card

space

Accessories

Blank panel for Clock card

Blank panel for Output card

Blank panel for Expansion Controller card

Blank panel for Output module

Short blank panel for Output module

Long blank panel for Output module

Wire-wrap input module

093-55598-01 Blank panel to cover slot of uninstalled input/clock card.

Master/Remote shelf only.

093-55598-02 Blank panel to cover slot of uninstalled output card.

Master/Remote or Expansion shelf.

093-55598-03 Blank panel to cover slot of uninstalled Expansion

Controller card. Expansion shelf only.

093-55599-01 Blank panel to cover space of unused output module.

Master/Remote shelf only.

093-55599-02 Blank panel to cover space of unused output module

slot. Covers one module space. Expansion shelf only.

093-55599-03 Blank panel to cover space of unused Output module

slot. Covers two module spaces (one group). Expansion shelf only.

Spare Parts

090-55561-01 Wire-wrap input board.

Master/Remote shelf only.

097-55501-02 Issue 8 – February 2005 TimeHub 5500 User’s Guide 61

Chapter 2 Engineering & Ordering Information User-Supplied Tools and Materials

Table 2-11. Accessories and Spare Parts (Continued)

Item Part Number Description

High capacity wire-wrap panel kit

093-55595-01 Wire-wrap panel with 160 outputs labeled A through D.

Includes kit to mount on 23 in. rack.

093-55595-02 Wire-wrap panel with 160 outputs labeled E through H.

Includes kit to mount on 23 in. rack.

User-Supplied Tools and Materials

User-supplied tools and materials are listed below.

 Phillips-head screwdriver for installing the TimeHub 5500 shelf in a rack

 Phillips-head or Pozidrive screwdriver for tightening or loosening captive screws

 ESD wrist strap for installing cards

 GMT fuse puller

 Digital multimeter (Fluke 77 or equivalent) for verifying power connections to the

shelf

 Dual-channel oscilloscope with 100 MHz minimum bandwidth for verifying clock

input signal(s) are within the specified input voltage range and checking output waveforms

 Laptop computer with communications software (e.g., Windows Hyperterminal,

ProComm Plus, CrossTalk) or TimeScan THC software for setting system parameters

62 TimeHub 5500 User’s Guide 097-55501-02 Issue 8 – February 2005

Chapter 3 Installing the TimeHub

This chapter includes:

 Overview

 Installation Checklist

 Unpacking the TimeHub 5500

 Rack Mounting the TimeHub 5500

 Configuring the Shelf as a Master or Remote

 Making Ground and Power Connections

 Installing Modules into the Rear Panel

 Making Signal Connections

 Installing the Cover

 Installing Expansion Shelves

Chapter

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Chapter 3 Installing the TimeHub Overview

Overview

Install the TimeHub 5500 using the sequence given in this chapter. This chapter covers steps to install the TimeHub 5500 system in preparation for power-up.

If you encounter any difficulties during the installation process, contact Symmetricom Global Services (SGS). See Technical Assistance, on page 185 for telephone numbers. SGS includes Product Technical Support for technical information, and Customer Service for information about your order, RMAs, and other information.

Site Survey

Before ordering the system, determine the shelf location, the –48 volt power source(s), and the grounding for the shelf. Remember to locate the shelf close to the equipment to be synchronized and as far away as possible from electrical noise sources such as air conditioners, elevator motors, power systems, etc. To avoid the effects of rapid temperature fluctuations, place the shelf so that heating or air conditioning vents do not blow directly on the shelf.

The TimeHub 5500 shelf, when installed, occupies 10.5 in (26.7 cm, 6 RU) of vertical rack space and has a depth of 11.5 in (29.2 cm). The Wire-wrap High-Density Adapter Panel delivered with the TimeHub 5500 occupies 3.5 in (8.9 cm, 2 RU) of vertical rack space and has a depth of approximately 4 in (10.1 cm). The optional 1 RU and 2 RU Cable Management kits add 2 RU and 4 RU respectively to each adapter panel on which you install the kit.

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 Equipment, on page 65.



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

Considerations, on page 65.

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

cabinet to safely operate the shelf, see Ventilation Considerations, on page 66.

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

has power available, see Making Ground and Power Connections, on page 73.

Electromagnetic Interference (EMI)

Warning: To avoid accidental power-up of the shelf, remove the A and B fuses on the front panel of the shelf before beginning the TimeHub 5500 installation. The unit is not equipped with a power on/off switch.

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Chapter 3 Installing the TimeHub

Overview

Installation Tools and Equipment

You will need the following tools and equipment to install the TimeHub 5500:

 Standard tool kit

 Cable sewing cord or acceptable ties or 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 equipment rack

 Digital Voltmeter

 Straight-through RS-232 cable

 Laptop or PC

 TimeHub THC application (delivered with the TimeHub 5500)

Electromagnetic Interference (EMI) Considerations

Electromagnetic interference (EMI) from one instrument can adversely affect the operation of nearby equipment. To prevent the TimeHub 5500 from interfering with other equipment, it must be installed and operated as described in the following paragraphs.

All cables connected to the TimeHub 5500 should be shielded with “drain” wires connected to the rack ground. Follow local procedures for shield grounding. The screws on all cable shells 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.

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Chapter 3 Installing the TimeHub Installation Checklist

Ventilation Considerations

For proper ventilation, there should be at least 1 RU (1.75 inches, 4.4 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.

Installation Checklist

To verify that each step in the installation procedure is complete, fill in the checklist in Table 3-1 as you complete the steps. You can complete the procedures in any order your site requires; the procedures in this Guide are in Symmetricom’s suggested sequence.

Table 3-1. Installation Checklist

Step Procedure Initials

Unpacking the TimeHub 5500, on page 67

Rack Mounting the TimeHub 5500, on page 67

Configuring the Shelf as a Master or Remote, on page 72

Making Ground and Power Connections, on page 73

Testing Power Connections, on page 76

Installing Modules into the Rear Panel, on page 77

Making Signal Connections, on page 81

Installing the Cover, on page 91

Installing the Management Card, on page 101, including setting the

internal switch

Installing the Clock Cards, on page 104, including setting the internal

switch

Installing Output Driver Cards, on page 107

Installing Expansion Shelves, on page 92

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Installing Expansion Controller Cards, on page 108

Installing Output Connector Modules, on page 94

Installing Output Driver Cards, on page 109

Unpacking the TimeHub 5500

The TimeHub 5500 is packaged to protect it from normal shock, vibration and handling damage. Care should be taken during unpacking and installation to avoid damaging the unprotected unit.

Caution: To avoid damage, use proper static control precautions when handling equipment! 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.

Chapter 3 Installing the TimeHub

Unpacking the TimeHub 5500

Recommendation: Keep all packaging materials in the event the shelf or components must be returned or shipped to another location.

Rack Mounting the TimeHub 5500

The procedure for rack mounting a Master, Remote, or an Expansion shelf is identical.

Note: If you are using an existing connection panel, follow the procedures in an approved Method of Procedure (MOP) for cutting over an existing shelf.

Mounting the Shelf

The shelf mounts flush to the rack or at distances of 2 inches (5.1 cm), or 5 inches (12.7 cm) from the front of the rack, as shown in Figure 3-1.

1. Attach a mounting bracket to each side of the shelf by aligning two columns (two

holes per column) of the bracket with the holes on the side of the shelf. 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 rack rails with the appropriate number of screws

and washers for the rack.

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Chapter 3 Installing the TimeHub Rack Mounting the TimeHub 5500

Figure 3-1. Mounting Options for the Shelf

Installing the Wire-wrap Panel

If you are using an existing wire-wrap panel (for example, part number 090-41902-01), leave the panel in the rack. Replace the cables using an approved Method of Procedure (MOP) for cutting over from an existing shelf.

If you are installing the wire-wrap panel delivered with the Master shelf (shown in

Figure 3-2), mount the panel in the rack after you install the shelf. Mount the panel

above or below the shelf, leaving enough space (at least 1 RU) for cable management above and below the wire-wrap panel. A Cable Management kit is available in 1U or 2U heights (093-55595-11 and 093-55595-12, respectively) to complete the installation. A rack extender bracket is included for 23-inch racks.

Figure 3-3 illustrates one way to assemble the wire-wrap panel with the Cable

Management kit and the rack extender bracket.

Recommendation: For most applications, Symmetricom recommends that you install the Wire-wrap panel and Cable Management kits on the rear of the rack rails. This improves the cable routing from the rear of the shelf to the wire-wrap panel.

You can mount the wire-wrap panel with either the connectors or the wire-wrap pins facing the front of the rack; follow your company procedures.

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Figure 3-2. High-Density Wire-wrap Panel (Front and Rear)

Chapter 3 Installing the TimeHub

Rack Mounting the TimeHub 5500

Figure 3-3. Assembling the Rack Extenders for a 23-inch Shelf

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Chapter 3 Installing the TimeHub Rack Mounting the TimeHub 5500

If you are installing an Expansion shelf, mount one wire-wrap panel above the Expansion shelf and the other below the Expansion shelf, leaving 1 RU above and below each wire-wrap panel for ventilation. A Figure 3-4 illustrates an example of a Master shelf and wire-wrap panel, and Figure 3-5 shows an example of a Master and Expansion shelf with three wire-wrap panels.

Figure 3-4. Sample Rack Installation of a Master Shelf

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Rack Mounting the TimeHub 5500

Figure 3-5. Sample Rack Installation of a Master and Expansion Shelf

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Chapter 3 Installing the TimeHub Configuring the Shelf as a Master or Remote

Configuring the Shelf as a Master or Remote

You can configure the TimeHub shelf for either Master or Remote operation by setting a switch on the backplane. The shelf and all plug-in cards are compatible with either mode of operation. Master/Remote Shelf, on page 32, describes the Master and Remote operating modes. The TimeHub 5500 shelf is delivered from the factory configured as a Master.

Note: Management cards (090-55542-01) and Clock cards (090-55512-0x, 090-55514-0x) with firmware versions 4109x do not support Remote shelves. Issue the TL1 command RTRV-NETYPEALL to retrieve the firmware version (see the TimeHub 5500 TL1 Reference Manual for detailed information about this command). If this firmware version is in your Management or Clock cards and you are interested in Remote shelf operation, contact Symmetricom Global Services for information about firmware upgrades.

SW1 (shown in Figure 3-6) determines the shelf configuration. The switch is located on the backplane behind the Management card slot.

Figure 3-6. Master/Remote Rotary Switch

To configure the shelf for Remote operation:

Caution: To avoid a loss of timing signals, perform the following procedure only on a shelf with no active outputs. Do not remove the fuses from a shelf that is providing timing signals.

1. Disconnect power from the shelf by removing the fuses from the front panel or by

disconnecting the wires from the power terminals on the rear panel of the shelf.

2. Remove the Management Card in order to obtain access to switch SW1. For

improved access, you can also remove the CLK1 card from the shelf.

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Chapter 3 Installing the TimeHub

Making Ground and Power Connections

3. Set the switch as appropriate using an 8-inch (20 cm) long screwdriver with a

1/8-inch (3 mm) blade. A small arrow on the rotary switch indicates the selected setting. Table 3-2 shows the function associated with the rotary switch settings.

– For a Master shelf, set the switch to 0

– For a Remote shelf, set the switch to 7

4. Replace the fuses to power up the shelf.

Table 3-2. Master/Remote Rotary Switch Settings and Functions

Rotary Switch Position Function Confirmation

0 (factory setting) Configures the shelf as Master Remote LED does not light

following Warmup

1 – 6 Reserved for future use –

7 Configures the shelf as Remote

Remote LED lights following Warmup

Making Ground and Power Connections

The TimeHub 5500 has redundant -48VDC power input connections labeled A and B. Both are located in the upper-right and upper-left corners of the rear panel, as shown in Figure 3-7.

Grounding the Shelf

Frame ground connections are made on power terminal blocks TB1 and TB2 on the rear panel of the shelf. Figure 3-7 illustrates the terminal connections.

1. Run a cable from each ground terminal to earth ground. Use one 16 AWG green

insulated wire to connect the ground terminal of TB1 to the frame ground. Use another 16 AWG green insulated wire to connect the ground terminal of TB2 to frame ground.

2. Crimp the supplied spade lug to one end of the 16 AWG wire and connect it to

the ground terminals on TB1 and TB2 (Figure 3-7).

3. Complete the ground connection using one of the methods described below,

depending on whether a ground rod is installed in the rack.

4. Using a digital voltmeter, measure between the ground and chassis and verify

that no voltage exists between them.

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Chapter 3 Installing the TimeHub Making Ground and Power Connections

Battery A and

Frame Ground

Battery B and

Frame Ground

External AlarmsShelf Alarms

Figure 3-7. Connectors on the Rear Panel of the Master Shelf

With Ground Rod

Solder each 16 AWG ground wire to the 6 AWG frame ground rod that is run vertically on each side of the rack, if provided. Two methods are acceptable:

 Crimp an appropriate-size spade lug to the 16 AWG wire, bend the lug around

the 6 AWG rod, and solder.

 Strip enough insulation from the 16 AWG wire to permit three complete turns

around the 6 AWG rod and solder.

Note: Use an appropriate soldering iron to ensure the 6 AWG rod is heated sufficiently to prevent a cold solder connection.

Without Ground Rod

Crimp the supplied spade lug to the 16 AWG wire, and screw the lug to a screw hole on the rack. Remove the paint and sand the area around the screw hole to ensure proper conductivity. Coat the connection with an electrically conductive antioxidant compound such as Kopr-Shield spray.

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Chapter 3 Installing the TimeHub

Making Ground and Power Connections

Grounding the Wire-wrap Panel

The Wire-wrap panel delivered with the TimeHub shelf has two ground terminals on the front panel. Connect each of these two terminals to ground as described in this section.

Note: If you are using an existing wire-wrap panel, leave the wire-wrap panel ground connection intact.

1. Run a cable from each ground terminal to earth ground. Use one 16 AWG green

insulated wire to connect each ground terminal to the frame ground.

2. Crimp the supplied spade lug to one end of the 16 AWG wire and connect it to

the ground terminals on the front panel of the wire-wrap panel (Figure 3-8).

3. Complete the ground connection using one of the methods described above,

depending on whether a ground rod is installed in the rack.

4. Using a digital voltmeter, measure between the ground and chassis and verify

that no voltage exists between them.

Figure 3-8. Wire-wrap Panel Ground Connection

Making Power Connections

Connect power leads to the shelf using the following procedure, but do not apply power at this time.

Warning: To avoid possible damage to equipment, you must provide power source protective fusing as part of the installation. The TimeHub is intended for installation in a restricted access location.

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Chapter 3 Installing the TimeHub Making Ground and Power Connections

Caution: To avoid damage to the shelf, remove the fuses in the fuse panel which powers the TimeHub 5500 Shelf before you make power connections. Also make sure to remove the fuses from the TimeHub 5500 shelf before connecting power.

1. Remove both fuses from the front panel of the shelf. You will replace them at the

end of the installation procedure.

2. Locate the power terminal blocks on the rear panel (Figure 3-9).

A. TB1 Connections

(Office Battery A)

Figure 3-9. Power and Ground Connections on the Master Shelf

B. TB2 Connections

(Office Battery B)

3. Using 18 AWG (minimum) stranded wire, connect primary power to the A

terminal screws and secondary power to the B terminal screws. Symmetricom recommends that you use a #6 spade lug termination for each power lead. If separate power supplies are not available, connect both A and B power from the same source.

Use 10 A fuses in the source that supplies power to the TimeHub 5500 shelf.

Testing Power Connections

To verify that the power connections to the TimeHub 5500 Main shelf are correct, follow the steps in this section. Use a digital multimeter (Fluke 77 or equivalent) to make the measurements. Refer to Figure 3-7, Figure 3-9, and Figure 3-18. Use this procedure for Master/Remote and Expansion shelves.

1. Remove all fuses that supply power to the shelf from the fuse panel and from the

front of the shelf.

2. Ensure that no Clock, Management, or Output Driver cards are installed in the

shelf.

3. Disconnect the

–48V battery A and battery B leads from the shelf power terminal

blocks TB1 and TB2 (Figure 3-9 and Figure 3-18). (Leave the Return battery leads connected to the shelf.)

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Chapter 3 Installing the TimeHub

Installing Modules into the Rear Panel

4. At the shelf end of the battery leads, use the multimeter to measure the voltage

between the following test points:

Test Point Test Point Result

Battery A lead Battery B lead 0 V Battery A lead TB1: Return A 0 V Battery A lead TB1: Ground 0 V Battery B lead TB2: Return B 0 V Battery B lead TB2: Ground 0 V

5. Reconnect the

(TB1 and TB2)

–48V battery A and battery B leads to the power terminal blocks

–48V A and –48V B terminals.

6. Install the A fuse in the power source fuse panel.

7. Measure the voltage between the

–48V A and Return terminals on the TB1

terminal block. The multimeter should indicate –42V dc to –56V dc.

8. Install the B fuse in the power source fuse panel.

9. Measure the voltage between the

–48V B and Return terminals on the TB2

terminal block. The multimeter should indicate –42V dc to –56V dc.

10.Install both 3AG 10 A fuses (fuse A and fuse B) in the front of the shelf. The shelf

is now powered up.

Installing Modules into the Rear Panel

This section describes how to install the Output Connector and Input/Alarm Connector modules into the rear panel of the shelf. Perform these procedures after you have installed the shelf into the rack. The procedures for installing modules into the front panel are described in Installing Cards into the Front Panel, on page 100.

Installing Rear Panel Modules

You install Output Connector modules and the Input/Alarm Connector module on the rear panel of the shelf, as shown in Figure 3-10.

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Chapter 3 Installing the TimeHub Installing Modules into the Rear Panel

Output Connector Modules

Figure 3-10. Location of Output Connector Modules on the Rear Panel of the Master/Remote Shelf

Input/Alarm Connector Module

Installing the Input/Alarm Connector Module

The Input/Alarm Connector module (part number 090-55561-01) mounts on the rightmost position on the rear panel of a Master or Remote shelf (see Figure 3-10). The module is shown in Figure 2-5. Expansion shelves do not use an Input/Alarm Connector module.

To install the module, align the pins on the rear of the module with the connector on the shelf. Carefully seat the module onto the shelf. Tighten the six captive screws to complete the installation.

Installing Output Connector Modules

You can install up to seven Output Connector modules in any of the locations on the rear panel of a Master or Remote shelf (see Figure 3-10). The Output Connector module determines the type of output signal generated. Each Output Connector module provides connections for 20 signals from the Output Driver cards. The Output Connector modules for a Master/Remote shelf cannot be used on an Expansion shelf.

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Chapter 3 Installing the TimeHub

Installing Modules into the Rear Panel

Master and Remote Shelves

For DS1 outputs, use DS1 Output Connector modules (part number 090-55591-01), which are part of the DS1 Output Connector Module Kit (990-55591-01).

For CC outputs, use CC Output Connector modules (part number 090-55593-01), which are part of the CC Output Connector Module Kit (990-55593-01).

To install the Output Connector module, align the pins on the rear of the module with the connector on the shelf. Carefully seat the module onto the shelf. Tighten the six captive screws to complete the installation.

Note: A label and the handle on each Master/Remote Output Connector module denotes the type of output signal it generates. Each DS1 Output Connector module is labeled “DS1” and has a black handle; each CC Output Connector module is labeled “CC” and has a blue handle.

Expansion Shelves

You can install up to 16 Output Connector panels in any of the locations on the rear panel of an Expansion shelf, as shown in Figure 3-11. The Output Connector module determines the type of output signal generated. Each Output Connector module provides connections for 20 signals from the Output Driver cards. The Output Connector modules for an Expansion shelf cannot be used on a Master/Remote shelf.

For DS1 outputs, use Output Connector module p/n 090-55591-02, which is part of the DS1 Output Module Kit (990-55591-02).

For CC outputs, use Output Connector module p/n 090-55593-02, which is part of the CC Output Module Kit (990-55591-02).

Note: The part number label on each Expansion Output Connector module denotes the type of output signal it generates. Each module may also have silk-screened text denoting the output signal it generates.

To install the Output Connector module on an Expansion shelf, align the pins on the rear of the module with the connector on the shelf. The vertical connector should be facing to the left and the small connector should be on the bottom facing towards the mating connector on the shelf. Carefully seat the module onto the shelf. Tighten the captive screws to complete the installation.

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Chapter 3 Installing the TimeHub Installing Modules into the Rear Panel

Figure 3-11. Location of Output Connector Modules on the Rear Panel of the Expansion Shelf

Installing Blank Panels

Install blank panels over each slot that is unused. The blank panel protects the connector, provides EMC shielding, and maintains efficient cooling airflow within the shelf.

Input/Clock Blank Panels (Master and Remote Shelf Only)

If you install only one Input/clock card, then install the blank panel (090-55598-01) in the empty slot space reserved for the second card.

Output Driver Blank Panels (All Shelves)

Install a blank panel (093-55598-02) in empty slots where Output Driver cards are not installed.

Output Connector Module Blank Panels (Master and Remote Shelf Only)

The blank panel (p/n 093-55599-01) can be used only in a Master/Remote shelf.

Install blank panels in the spaces where no Output Connector modules are installed.

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Output Connector Module Blank Panels (Expansion Shelf Only)

There are two types of Output Connector module blank panels for the Expansion shelf:

 The blank panel p/n 093-55599-02 is a single height blank panel. It covers only

one Output Connector module space.

 The blank panel p/n 093-55599-03 is a double-height blank panel. It covers a

complete output group, including both Output Connector module spaces.

Install the desired Output Connector module blank panels in the back of the Expansion shelf.

Making Signal Connections

After you install the shelf in the rack, you need to make the following types of signal connections:

Chapter 3 Installing the TimeHub

Making Signal Connections

 Shelf to connection panel

 Timing inputs

 Communications

 Alarms

Figure 3-12 shows the power, timing input, and communication port connectors on

the rear panel of the shelf.

If you are not installing an Expansion shelf, you must install a Termination Connector (090-555xx-0x) on both Expansion Link 1 and Expansion Link 2 on the rear panel of the shelf. These Termination Connectors are included in the Master/Remote shelf kit.

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Chapter 3 Installing the TimeHub Making Signal Connections

Battery A and

Frame Ground

Local

Comm Port

Reserved for

future use

Expansion Ports

Reserved for

future use

LAN Port

Battery B and

Frame Ground

Figure 3-12. Rear Panel Connectors on the Main Shelf

Making Shelf–to–Panel Connections

Connect the factory-supplied cable from the connector on the Output Connector card on the rear panel of the shelf to the appropriate connector on the wire-wrap panel. Repeat as needed, depending on the number of outputs used. Refer to

Figure 3-13.

Note: The shield drain conductor is provided to ground to the rack frame ground at the wire-wrap connector end. Symmetricom does not recommend that you ground the shield at both ends.

If the timing lead is connected to a Network Element with an isolated ground configuration, then terminate the shield wire at the Network Element.

Dress the cables using your company standards.

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Making Signal Connections

To maximize the number of timing leads that you can terminate on the High-Density Wire-wrap Panel, Symmetricom recommends that you cut back the sheathing on the cable such that only the Tip, Ring, and insulated Shield conductors enter the cable management kit. Removing up to 24 inches (61 cm) of shielding will have little or no effect on the stability of the timing signals.

Figure 3-13. Connecting Outputs to the High-Density Wire-wrap Panel

Figure 3-14 illustrates how to connect the TimeHub to existing wire-wrap panels

used with a DCD-5XX shelf.

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Chapter 3 Installing the TimeHub Making Signal Connections

Figure 3-14. Connecting Outputs to Existing Wire-wrap Panels

Figure 3-15 and Figure 3-16 illustrate how to connect the A through D and E

through H outputs from the TimeHub Expansion shelf to the High-Density Wire-wrap Panel, respectively. The diagrams illustrate suggested cable routing using the optional Cable Management trays.

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Making Signal Connections

Figure 3-15. Connecting A-D Outputs of the Expansion Shelf to the High-Density Wire-wrap Panel

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Chapter 3 Installing the TimeHub Making Signal Connections

Figure 3-16. Connecting E-H Outputs of the Expansion Shelf to the High-Density Wire-wrap Panel

Connecting Timing Inputs

You make all timing input connections on the Input/Alarm Connector module (Figure

3-17). Install the module as described in Installing the Input/Alarm Connector Module, on page 78.

DS1 Reference

You can connect up to four DS1 reference inputs to the TimeHub 5500; use the wire-wrap pins labeled DS1 TERM IN on the Input/Alarm Connector module. Connect the tip wire to the pins labeled T, the ring wire to the pins labeled R, and the shield (if connected at the TimeHub 5500) to the pins labeled S.

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Composite Clock

(Remote shelf use)

PRS input

Chapter 3 Installing the TimeHub

Making Signal Connections

DS1 Reference

DS1 Monitor

Figure 3-17. Input/Alarm Connector Module Connections

DS1 Monitor

You can connect up to four additional DS1 inputs using the DS1 BRIDG IN pins on the Input/Alarm Connector module only when you install nine-input Clock cards (090-55512-02 or 090-55514-02). Connect the tip wire to the pins labeled T, the ring wire to the pins labeled R, and the shield (if connected at the TimeHub 5500) to the pins labeled S.

PRS Input

Connect the PRS input to the BNC connector labeled 5/10 MHz IN on the Input/Alarm Connector module.

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Chapter 3 Installing the TimeHub Making Signal Connections

CC Input

You can connect one or two Composite Clock (CC) inputs when you configure the shelf for Remote operation (see Configuring the Shelf as a Master or Remote, on page 72). Connect the tip wire to the pins on the Input/Alarm Connector module labeled T, the ring wire to the pins labeled R, and the shield (if connected at the TimeHub 5500) to the pins labeled S.

Making Communication Connections

Connecting a LAN Cable

Connect the LAN cable from the network to the RJ-45 (10Base-T) connector labeled LAN on the rear of the shelf. Refer to Figure 3-12 for the connector location; Tab le

3-3 describes the connector pinout.

Each TimeHub 5500 has its own IP address that can be set through the local RS-232 port, as described in Communicating by Ethernet, on page 112. Once the IP address has been set and a LAN connection made, the TimeHub 5500 can be remotely accessed on a network.

Table 3-3. LAN Connector Pinouts

Pin Signal Abbreviation Direction

1 Transmit data + TXD + From TimeHub 5500

2 Transmit data – TXD – From TimeHub 5500

3 Receive data + RXD + To TimeHub 5500

6 Receive data – RXD – To TimeHub 5500

Note: Pins not listed are reserved for future use.

Connecting a Local Serial Cable

The Local connector on the rear panel of the TimeHub 5500 provides a 9-pin RS-232 link for TL1 command access. See Figure 3-12 for the location of the connector and Table 3-4 for the connector pinouts. The Local communication port on the front panel of the Management card provides the same function as the Local communication port on the rear of the shelf.

Note: You cannot make connections to both of the Local ports simultaneously; only one port can be used at a time.

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Making Signal Connections

Table 3-4. Pinout of Local Communications Port

Pin Signal Abbreviation Direction

2 Transmit data TXD From TimeHub 5500

3 Receive data RXD To TimeHub 5500

5 Signal ground GND –

7 Clear to send CTS To TimeHub 5500

8 Request to send RTS From TimeHub 5500

Note: Pins not listed are reserved for future use.

The TimeHub 5500 is wired as a DTE device; use a null-modem cable to connect a laptop. Use a straight-through cable to connect a modem to this port. The default port setting are 9600 baud, no parity, 8 data bits, 1 stop bit, echo on, and handshaking disabled.

Connecting Alarms

You can make three types of alarm connections to the Input/Alarm Connector module: Office, External, and Universal. Two sets of office alarm connections allow you to signal minor, major, and critical error conditions within the TimeHub 5500. External and universal alarms allow you to connect alarms from other equipment.

You can also monitor alarms using the TimeScan THC software. Alarms are transmitted over the serial or Ethernet communications port; you do not have to make any alarm connections on the Input/Alarm Connector module.

The Alarm Cutoff pushbutton on the front panel of the Management card de-activates alarm output on all of the audible (AUD) alarm wire-wrap pins. When an alarm occurs, the appropriate alarm LED lights on the front panel of the Management card. The alarm is asserted on the appropriate AUD and VIS wire-wrap pins. Pressing the cutoff pushbutton for approximately 10 s de-asserts the alarm on the AUD pins and the cutoff LED will light (indicating that audible alarms have been cut off). Any alarm asserted on the VIS wire-wrap pins is unaffected by the cutoff pushbutton. The alarm LED and cutoff LED will remain lit until the condition causing the alarm is no longer present. Should new alarms occur later, the AUD alarm will activate again.

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Chapter 3 Installing the TimeHub Making Signal Connections

Note: If simultaneously-occurring alarms have different severity levels, only the alarm with the highest severity appears on the front panel LEDs if the alarms are both either in the “System” or “Shelf” category. For example, if there are both MAJOR and MINOR shelf alarms present, only the MAJOR alarm LED is lit in the “Shelf” alarm row. In this case, if the MAJOR alarm ends, then the MINOR alarm LED will light (assuming that the source of that alarm is still present) since this is now the highest severity alarm.

It is possible to have alarm LEDs of different severity illuminated if one is a shelf alarm and the other a system alarm. If there is a MAJOR shelf alarm and a MINOR system alarm (any of the external alarms in 7 to 10 range), then the MAJOR LED is lit for the shelf alarm row and the MINOR LED is lit for the system alarm row.

Connecting Office Alarms

The Office alarms provide normally-open, center, and normally-closed contact pins. You connect the office alarms to the OFFICE ALARM critical (CR), major (MJ), and minor (MN) wire-wrap pins on the Input/Alarm Connector module. See Figure 3-17 for the location of the pins.

Use the AUD pins on the left for audible alarms and the VIS pins on the right for visible alarms. Connect the alarm circuit between the NO and C pins for normally open contacts, or between the NC and C pins for normally closed contacts. If required, use the pins (VIS) on the right to connect to remote telemetry equipment.

Perform the following steps to ensure proper alarm connections to the TimeHub

5500.

1. Ensure that both fuses are removed from the front panel.

2. Locate the OFFICE ALARM critical (CR), major (MJ), and minor (MN) wire-wrap

pins on the Input/Alarm Connector module.

3. Connect office alarms to the wire-wrap terminals.

4. Verify that correct wiring connections have been made.

5. Reinstall both fuses.

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.

Connecting External Alarms

Connect the external alarm inputs (customer-configured alarm inputs) to RACK ALM INPUTS wire-wrap pins 1 through 10 on the Input/Alarm Connector module. See Figure 3-17 for the location of the pins.

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Chapter 3 Installing the TimeHub

Installing the Cover

The external alarm inputs allow the TimeHub 5500 to accept alarms from external equipment. When an alarm is accepted:

 an alarm LED lights in the “system” row on the Management card

 the appropriate alarm output wire-wrap pins (AUD and VIS) activate on the Alarm

Connector card

 an automatic message appears on the Local and LAN communications ports

(see Management Card, on page 24), notifying a remote management system of the external alarm condition.

There are two types of external alarm inputs: contact closure only and universal.

Contact Closure Only External Alarms

These six sets of alarm inputs (5-10) operate from any relay contact closure. Severity levels associated with these alarm inputs are:

 MAJOR: inputs 5 and 6

 MINOR: inputs 7-10

Universal External Alarms

These four sets of alarms operate from any relay contact closure. They are also capable of accepting alarms produced by a source transition to and from –48 V. Transition from –48 V to 0 generates an alarm; transition from 0 to –48 V clears the alarm. Severity levels for the universal alarms are:

 MAJOR: inputs 1, 2

 MINOR: inputs 3, 4

GPS Input

The GPS connector is reserved for future use.

Installing the Cover

Fit the plastic cover over the rear of the shelf after you make all connections. Use the captive screws to attach it to each corner of the shelf.

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Chapter 3 Installing the TimeHub Installing Expansion Shelves

Installing Expansion Shelves

The TimeHub 5500 has two interface connectors to connect an Expansion shelf. You can connect up to four Expansion shelves in a daisy-chain fashion using two Expansion Interface cables (060-55591-02) per shelf. You make the connection using the Expansion Link 1 and 2 connectors on the rear panel of the Main shelf.

Installing the Shelf in the Rack

Install the Expansion shelf using the procedure described in Rack Mounting the

TimeHub 5500, on page 67.

Making Ground and Power Connections

The Expansion shelf has redundant -48VDC power input connections labeled A and B. Both are located in the upper-right and upper-left corners of the rear panel; the connections are three-position terminal blocks, as shown in Figure 3-18. The connections are not the same as on the Master shelf.

A. TB1 Connections

(Office Battery A)

Figure 3-18. Power and Ground Connections on the Expansion Shelf

B. TB2 Connections

(Office Battery B)

Install power and ground connections using the procedure described in Making

Ground and Power Connections, on page 73.

Warning: To avoid possible damage to the shelf and to the office power supply, connect power wiring as indicated on the rear of the Expansion shelf. The power connections on the Expansion shelf are not the same as on the Master shelf.

Setting the Expansion Shelf Address

You can install up to four Expansion shelves in a daisy-chain to a Master or Remote shelf. Each Expansion shelf requires a unique address. You set the address of the Expansion shelf using an eight-position rotary switch on the backplane (Figure

3-19). This switch is located near the bottom at the left side, behind the slot for

Expansion Controller card 1 (labeled EC1). The factory default setting is “1”.

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Chapter 3 Installing the TimeHub

Installing Expansion Shelves

The address of the Expansion shelf connected to the Master or Remote shelf is always 1. The next Expansion shelf has an address of 2, and so on.

Caution: To avoid a loss of timing signals, perform the following procedure only on a shelf with no active outputs. Do not remove the fuses from a shelf that is providing timing signals.

Figure 3-19. Address Switch SW1 on the Expansion Shelf

1. Disconnect power from the shelf by removing the fuses from the front panel or by

disconnecting the wires from the power terminals on the rear panel of the shelf.

2. Remove the Expansion Controller card from slot EC1 (if it is installed) in order to

obtain access to switch SW1. For improved access, you can also remove the adjacent Output Driver card from the shelf.

3. Set switch SW1 on the Expansion shelf as appropriate using an 8-inch (20 cm)

long screwdriver with a 1/8-inch (3 mm) blade. A small arrow on the rotary switch identifies the selected setting. Table 3-5 shows the function associated with the rotary switch settings.

Table 3-5. Expansion Shelf Rotary Switch Settings and Functions

Rotary Switch Position Function Confirmation

1(default) – 4 Sets a unique address for the

Expansion shelf

All other positions Reserved for future use –

TL1 responses originating from this shelf start with Sx, where x is the value of the rotary switch

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Chapter 3 Installing the TimeHub Installing Expansion Shelves

Installing Output Connector Modules

You can install up to 16 Output Connector panels in any of the locations on the rear panel of an Expansion shelf, as shown in Figure 3-20. The Output Connector module determines the type of output signal generated. Each Output Connector module provides connections for 20 signals from the Output Driver cards. The Output Connector modules for an Expansion shelf cannot be used on a Master/Remote shelf.

For DS1 outputs, use connector module part number 090-55591-02, which is part of the DS1 Output Module Kit (990-55591-02).

H1-20 H 21-40

Figure 3-20. Location of Output Connector Modules on the Rear Panel of the Master/Remote Shelf

G1-20 G 21-40

F1-20 F21-40

E1-20 E 21-40

D1-20 D21-40

C1-20 C 21-40

B1-20 B 21-40

A1-20 A 21-40

For CC outputs, use connector module part number 090-55593-02, which is part of the CC Output Module Kit (990-55591-02).

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Chapter 3 Installing the TimeHub

Installing Expansion Shelves

Making Expansion Shelf Connections

Two cables provide timing and data to the Expansion shelf from either the Master shelf or to an upstream Expansion shelf. Two additional cables provide timing and data to a downstream Expansion shelf. This section describes the procedures to connect a single Expansion shelf and multiple Expansion shelves.

Connecting a Single Expansion Shelf

You make the connections on the rear panel of the Master and Expansion shelves, as shown in Figure 3-21. You need two cables (060-55505-01), one gender changer (128-55505-01), and two Termination Connectors (090-55505-01), which are included with the Expansion shelf kit.

1. Connect one end of cable 060-55505-01 to the Expansion Link 1 connector on

the rear panel of the Master shelf. The connectors are gender-coded to ensure correct installation.

2. Connect the other end of this cable to the Expansion Link 1 IN connector on the

rear panel of the Expansion shelf.

3. Connect one end of the second 060-55505-01 cable to the Expansion Link 2

connector on the Master shelf.

4. Connect the other end of this cable to the Expansion Link 2 IN connector on the

Expansion shelf.

5. Install a gender changer 128-55505-01 to the Expansion Link 2 OUT connector

on the Expansion shelf.

6. Install the Termination Connectors on the Expansion Link 1 OUT and Expansion

Link 2 OUT connectors.

7. Tighten all connections.

Connecting Multiple Expansion Shelves

You make the connections on the rear panel of the Master and Expansion shelves, as shown in Figure 3-22. You need two cables (060-55505-01) for each Expansion shelf, one gender changer (128-55505-01), and two Termination Connectors (090-55505-01), which are included with the Expansion shelf kit.

1. Connect one end of cable 060-55505-01 to the Expansion Link 1 connector on

the rear panel of the Master shelf. The connectors are gender-coded to ensure correct installation.

2. Connect the other end of this cable to the Expansion Link 1 IN connector on the

rear panel of the first Expansion shelf.

3. Connect one end of a second cable 060-55505-01 to the Expansion Link 2

connector on the Master shelf.

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Chapter 3 Installing the TimeHub Installing Expansion Shelves

4. Connect the other end of this cable to the Expansion Link 2 IN connector on the

first Expansion shelf.

5. Connect one end of a third cable 060-55505-01 to the Expansion Link 1 OUT

connector on the first Expansion shelf.

6. Connect the other end of this cable to the Expansion Link 1 IN connector on the

second Expansion shelf.

7. Connect one end of a fourth cable 060-55505-01 to the Expansion Link 2 OUT

connector on the first Expansion shelf.

8. Connect the other end of this cable to the Expansion Link 2 IN connector on the

second Expansion shelf.

9. Repeat steps 5 through 8 for each additional Expansion shelf in the system.

10.Install a gender changer 128-55505-01 to the Expansion Link 2 OUT connector

on the last Expansion shelf in the system.

11.Install the Termination Connectors on the Expansion Link 1 OUT and Expansion

Link 2 OUT connectors on the last Expansion shelf in the system.

12.Tighten all connections.

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Chapter 3 Installing the TimeHub

Installing Expansion Shelves

Address

Switch SW1

set to “1”

Figure 3-21. Connecting a Single Expansion Shelf

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Chapter 3 Installing the TimeHub Installing Expansion Shelves

Address

Switch SW1

set to “1”

Address

Switch SW1

set to “2”

Figure 3-22. Connecting Multiple Expansion Shelves

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Chapter 4 Testing and Configuring the TimeHub

Chapter

This chapter includes:

 Overview

 Installing Cards into the Front Panel

 Installing Cards into the Expansion Shelf

 Establishing a Connection to the TimeHub

 Provisioning Master Shelf Parameters

 Provisioning Inputs on a Master Shelf

 Provisioning Inputs on a Remote Shelf

 Testing the Clock Input Signals

 Provisioning the Outputs

 Configuring CC Signals

 Checking System Operation

 Enabling Security

 Setting the Configuration to Factory Defaults

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Chapter 4 Testing and Configuring the TimeHub Overview

Overview

This chapter describes how to install cards into the front panel and configure the TimeHub 5500. Perform these tasks after you install the shelf and make power, input, alarm, and communications connections described in Chapter 3, Installing the

TimeHub. If you encounter any difficulties during the installation process, contact

Symmetricom Global Services. See Technical Assistance, on page 185 for telephone numbers.

Installing Cards into the Front Panel

The procedures in this section describe how to install the cards into the front panel of the TimeHub 5500 shelf. See also Installing Modules into the Rear Panel, on page 77. Refer to Figure 4-1 for the location of the fuse holders and slots for the cards. Turn on power to the shelf as described in Testing Power Connections, on page 76.

B Fuse and LED A Fuse and LED

Management

Card

Figure 4-1. Front Panel of the TimeHub 5500 Shelf

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Clock

Cards

Output Driver

Cards

Symmetricom TimeHub 5500 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

How to Use This Guide

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

What’s New In This Guide

Chapter 1 Description

Overview

Physical Description

Functional Description

Communication Ports

Power Supply

Input/Alarm Connector Module

Clock Cards

Management Card

Output Driver Cards

Alarms

Output Connector Modules

Connection Panels

Alarm Connections

Synchronization Status Messaging

Input SSMs

Automatic Reference Switching

Output SSMs

Passthrough Mode

Passthrough Considerations

Firmware Versions and Passthrough Operation

Master/Remote Shelf

Remote Shelf Capability

SSMs in a Remote Shelf

Expansion Shelf

Output Driver Cards

Expansion Controller Card

Rear Panel of the Expansion Shelf

Expansion Output Connector Modules

Output Driver Cards and Output Connector Modules

Redundancy Considerations

Communicating With the Expansion Shelf

TimeScan THC Software

Chapter 2 Engineering & Ordering Information

Overview

Wire-wrap Panels

Accessories

Card Overview

Clock Cards

Management Card

Output Driver Cards

Input/Alarm Connector Module

Output Connector Modules

Expansion Controller Card

Ordering and Parts List

User-Supplied Tools and Materials

Chapter 3 Installing the TimeHub

Overview

Site Survey

Preliminary Procedures

Installation Tools and Equipment

Electromagnetic Interference (EMI) Considerations

Ventilation Considerations

Installation Checklist

Unpacking the TimeHub 5500

Rack Mounting the TimeHub 5500

Mounting the Shelf

Installing the Wire-wrap Panel

Configuring the Shelf as a Master or Remote

Making Ground and Power Connections

Grounding the Shelf

Grounding the Wire-wrap Panel

Making Power Connections

Testing Power Connections

Installing Modules into the Rear Panel

Installing Rear Panel Modules

Installing the Input/Alarm Connector Module

Installing Output Connector Modules