TimeCreator 1000
DOCSIS Timing Interface Server
User’s Guide
Revision C – February 2010
Part Number 097-93100-01
Symmetricom, Inc.
2300 Orchard Parkway
San Jose, CA 95131-1017
U.S.A.
http://www.symmetricom.com
Copyright © 2010 Symmetricom, Inc.
All rights reserved. Printed in U.S.A.
All product names, service marks, trademarks, and registered trademarks
used in this document are the property of their respective owners.
Contents
How to Use This Guide
Purpose of This Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Who Should Read This Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Structure of This Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Conventions Used in This Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Warnings, Cautions, Recommendations, and Notes . . . . . . . . . . . . . . . . . . . .19
Related Documents and Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Where to Find Answers to Product and Document Questions . . . . . . . . . . . . .20
What’s New In This Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Chapter 1 Overview of the TimeCreator 1000
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Input Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Output Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Communications Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Clock Design. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Performance Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Server Status Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Phase Measurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
MTIE Calculations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Physical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
IOC Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
IMC Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Power Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Rear Panel Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Communication Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Local Craft Serial Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Management Ethernet Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
NTP Server Ethernet Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Reference Inputs and TOD Sources. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
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Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Chapter 2 Engineering and Ordering Procedures
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
TimeCreator 1000 Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
System Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Two-Way GPS Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
Common Configuration Parts Lists. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
User-Supplied Tools and Materials. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Chapter 3 Installing the TimeCreator 1000
Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Site Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Installation Tools and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Unpacking the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Rack Mounting the Shelf. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Working With Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
Handling Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
Inserting Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Removing Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Making Signal Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Making Communications Connections . . . . . . . . . . . . . . . . . . . . . . . . . . .53
GPS Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Input and Output Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Making Ground and Power Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
Ground Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
Power Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
Installation Check List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Applying Power to the TimeCreator 1000. . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Normal Power Up Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Chapter 4 General Guidelines for using the Symmetricom
TimeCreator 1000
Clock Operations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
GPS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
NTP Client Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
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DHCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
CLI commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
Logging In And Out. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
Adding And Deleting Users. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
Saving The Present Configuration To Non-volatile Memory. . . . . . . . . . .66
Restoring Default Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
Determining Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
Enabling Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
Setting The Output To Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
Configuring For Default Mode (Real Time Clock). . . . . . . . . . . . . . . . . . .67
Configuring For User Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
Configuring For GPS Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
Configuring For NTP Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
Configuring For Subtending Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
Forcing Unit To Send New Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
Setting Manual Cable Advance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
Setting Auto Cable Advance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
Configuring Static IP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
Configuring Dynamic IP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
Switching Active And Standby Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
Chapter 5 Provisioning
Establishing a Connection to the TimeCreator 1000. . . . . . . . . . . . . . . . . . . . .72
Communicating Through the Serial Port. . . . . . . . . . . . . . . . . . . . . . . . . .72
Communicating Through the Ethernet Port . . . . . . . . . . . . . . . . . . . . . . .72
Managing the User Access List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
Login. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
Adding a User. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
Deleting A User. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
Displaying Current Users and User Access Levels . . . . . . . . . . . . . . . . .76
Displaying Logged in Users . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
Changing a User’s Password and Access Level . . . . . . . . . . . . . . . . . . .77
Managing the IP Address Whitelist. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
Add an IP Address to the Whitelist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
Delete an IP Address From the Whitelist . . . . . . . . . . . . . . . . . . . . . . . . .79
Set the Whitelist to Default . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79
Provisioning Login Authentication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79
Provisioning the TC1000 for Login Authentication . . . . . . . . . . . . . . . . . .79
Configuring the RADIUS Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
Configuring the TACACS+ Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
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Provisioning Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84
Provisioning the Ethernet Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84
Static IP Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84
DHCP Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85
Setting the System Date, Time and Time Offset. . . . . . . . . . . . . . . . . . . . . . . .85
Setting the DTI Server Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
Root DTI Server in Free-run Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87
Root DTI Server in GPS Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88
Subtending DTI Server Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88
Provisioning the Input Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89
Setting the GPS Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89
Setting the DTI Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90
Setting the NTP Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91
Force System Time to Reference (Jam Sync) . . . . . . . . . . . . . . . . . . . . .91
Provisioning the DTI Links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
Enabling and Disabling the DTI Server Links . . . . . . . . . . . . . . . . . . . . . .92
Enabling and Disabling the DTI Client/Server Links . . . . . . . . . . . . . . . . .92
Enabling DTI Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94
Provisioning Revertive and Non-Revertive Mode . . . . . . . . . . . . . . . . . . . . . . .94
Provisioning Root Server Recovery Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . .95
Benefit of Using Root Server Recovery . . . . . . . . . . . . . . . . . . . . . . . . . .95
Root Server Recovery vs. Root Recovery . . . . . . . . . . . . . . . . . . . . . . . .95
Requirements for Root Server Recovery . . . . . . . . . . . . . . . . . . . . . . . .100
Duration of Root Server Recovery Process . . . . . . . . . . . . . . . . . . . . . .100
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100
Enabling Root Server Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .101
Displaying Configuration of Root Server Recovery. . . . . . . . . . . . . . . . .101
Displaying Status of Root Server Recovery . . . . . . . . . . . . . . . . . . . . . .101
Aborting Root Server Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102
Provisioning SNMP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103
Provisioning an NTP Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104
Provisioning Cable Advance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105
Provisioning Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105
Provisioning the Set and Clear Alarm Thresholds . . . . . . . . . . . . . . . . .106
Provisioning the Alarm-States. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106
Retrieving Current Alarm Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . .108
Retrieving Current Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .108
Displaying System Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .108
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Routine Operation Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109
Displaying Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109
Displaying Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109
Restarting TimeCreator 1000’s IMC Card. . . . . . . . . . . . . . . . . . . . . . . .110
Saving and Restoring Provisioning Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . .110
Backing up Provisioning Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110
Restoring Provisioning Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .111
Chapter 6 Maintenance and Troubleshooting
Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .116
Safety Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .116
ESD Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .116
Diagnosing the IOC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117
Reading LED Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117
Removing the IOC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117
Replacing the IOC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120
Diagnosing the IMC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .121
Reading LED Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .121
Replacing the IMC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .122
Repairing the TimeCreator 1000. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .122
Obtaining Technical Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .123
Upgrading the Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .123
Upgrading the IOC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .123
Upgrading the IMC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .125
Returning the TimeCreator 1000. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .126
Repacking the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .126
Equipment Return Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .126
User’s Guide Updates. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .127
Appendix A Alarms, Events and SNMP Traps
Alarm Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .130
Event Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .138
SNMP Traps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .148
SNMP Alarm Traps. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .150
SNMP Event Traps. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .158
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Appendix B Command Descriptions and
Communications Interface
CLI Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .176
General Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .176
Command User Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .177
CLI Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .178
Simple Network Management Protocol. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .268
SNMP Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .269
SNMPv3 Security Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .269
Management Information Base. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .269
SNMP Users and Manager Addresses. . . . . . . . . . . . . . . . . . . . . . . . . .269
Network Time Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .271
Server Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .272
Client Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .272
Secure Shell Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .272
Secure File Transfer Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .272
Appendix C Installing the Two-Way GPS Antenna
Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .274
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .274
Making GPS Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .275
Installing the GPS Antenna. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .275
Appendix D Specifications and Factory Defaults
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .284
Mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .284
Environmental. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .284
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .285
Serial Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .285
LAN Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .286
Input Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .286
Output Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .286
Roof Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .287
Factory Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .287
Alarm Default Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .290
8 TimeCreator 1000 User’s Guide 097-93100-01 Revision C – February, 2010
Table of Contents
Appendix E Software Licenses
Third-Party Software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .292
Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .295
097-93100-01 Revision C – February, 2010 TimeCreator 1000 User’s Guide 9
Table of Contents
10 TimeCreator 1000 User’s Guide 097-93100-01 Revision C – February, 2010
Figures
1-1 DTI Server Hierarchy and M-CMTS Elements. . . . . . . . . . . . . . . . . . . . . . .24
1-2 TimeCreator 1000 Front View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
1-3 TimeCreator 1000 Rear View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
1-4 TimeCreator 1000 Modules and DTI Links . . . . . . . . . . . . . . . . . . . . . . . . .31
1-5 TimeCreator 1000 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
1-6 IMC Module Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
1-7 IOC Module Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
3-1 Installing the TimeCreator 1000. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
3-2 IMC Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
3-3 Serial Port Connector Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
3-4 Rear Panel DTI Links. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
3-5 TimeCreator 1000 DC Power Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
3-6 TimeCreator 1000 AC Power Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
5-1 State Diagram for Root Server Recovery - USER mode. . . . . . . . . . . . . . .97
5-2 Simple Deployment with Root Server Recovery . . . . . . . . . . . . . . . . . . . . .98
5-3 Large Scale Deployment with Root Server Recovery . . . . . . . . . . . . . . . . .98
5-4 State Diagram for Root Recovery - GPS, NTP, and RTC modes . . . . . . . .99
A-1 SNMP MIB - Event Table Entries. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .149
A-2 SNMP MIB - Trap Object Parameters and Event Log Entries. . . . . . . . . .149
A-3 SNMP MIB - Trap Object Binding Example. . . . . . . . . . . . . . . . . . . . . . . .150
B-1 TimeCreator 1000 CLI Command Set. . . . . . . . . . . . . . . . . . . . . . . . . . . .176
C-1 Locating the GPS Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .275
C-2 Antenna-to-Device Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .277
C-3 Installing the Antenna Bracket on a Pipe. . . . . . . . . . . . . . . . . . . . . . . . . .278
C-4 Installing the Antenna Bracket on a Post. . . . . . . . . . . . . . . . . . . . . . . . . .278
C-5 Attaching the Antenna to the Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . .279
C-6 Assembling the Lightning Suppressor. . . . . . . . . . . . . . . . . . . . . . . . . . . .280
097-93100-01 Revision C – February, 2010 TimeCreator 1000 User’s Guide 11
List of Figures
12 TimeCreator 1000 User’s Guide 097-93100-01 Revision C – February, 2010
Tables
1-1 TimeCreator 1000 Input Signal Source . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
2-1 Common Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
2-2 AC Power Cord Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
2-3 Component Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
2-4 GPS Parts and Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
2-5 TimeCreator 1000 No Redundancy - NA AC Power - P/N 990-93101-01 . .41
2-6 TimeCreator 1000 - NA AC Power - P/N 990-93105-01 . . . . . . . . . . . . . . .41
2-7 TimeCreator 1000 - NA AC Power & Rdnt Clk, 8port - P/N 990-93105-02 .41
2-9 TimeCreator 1000 - NA AC Power - P/N 990-93107-01 . . . . . . . . . . . . . . .42
2-8 TimeCreator 1000 - DC Power - P/N 990-93106-01 . . . . . . . . . . . . . . . . . .42
2-10 TimeCreator 1000 - DC power - P/N 990-93108-01 . . . . . . . . . . . . . . . . . .43
2-11 TimeCreator 1000 - NA AC Power - P/N 990-93109-01 . . . . . . . . . . . . . . .43
2-12 TimeCreator 1000 - DC power - P/N 990-93110-01. . . . . . . . . . . . . . . . . . .44
2-13 GPS Antenna Kit - P/N 990-93500-01. . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
2-14 NTP option - P/N 990-93200-01 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
3-1 Management and NTP Server Ethernet Connector Pin Assignments. . . . .54
3-2 Serial Port Connector Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . .54
3-3 DTI and Root DTI Connector Pin Assignments . . . . . . . . . . . . . . . . . . . . . .56
3-4 Installation Completeness Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
3-5 Module LED Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
4-1 TOD Source Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
5-1 User Level and Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
5-2 Security Levels vs. RADIUS Server Class Attribute Settings . . . . . . . . . . .80
5-3 Security Levels vs. RADIUS Server Class Attribute Settings . . . . . . . . . . .82
5-4 TimeCreator 1000 Input Signal Source . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
5-5 DTI Link LED Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93
5-6 Recovery Modes Based on TOD Source. . . . . . . . . . . . . . . . . . . . . . . . . . .96
5-7 TimeCreator 1000 Alarm Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107
6-1 Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .116
6-2 LED Conditions for the IOC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117
6-3 LED Conditions for the IMC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .121
A-1 Identification Parameters for Alarms, Events and Traps . . . . . . . . . . . . . .130
A-2 System Notification Messages - Alarms . . . . . . . . . . . . . . . . . . . . . . . . . .131
A-3 System Notification Messages - Events. . . . . . . . . . . . . . . . . . . . . . . . . . .138
A-4 MIB Var Bindings for Symmetricom- specific Traps. . . . . . . . . . . . . . . . . .148
A-5 TimeCreator 1000 Alarm Trap Details . . . . . . . . . . . . . . . . . . . . . . . . . . . .150
097-93100-01 Revision C – February, 2010 TimeCreator 1000 User’s Guide 13
List of Tables
A-6 TimeCreator 1000 Alarm Traps - Additional Details. . . . . . . . . . . . . . . . . .152
A-7 Standard SNMP Traps Supported by TC1000. . . . . . . . . . . . . . . . . . . . . .158
A-8 TimeCreator 1000 Event Trap Details . . . . . . . . . . . . . . . . . . . . . . . . . . . .158
A-9 TimeCreator Events Traps - Additional Details . . . . . . . . . . . . . . . . . . . . .162
B-1 TimeCreator 1000 Alarm Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .180
B-2 Time Zone Offsets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .194
C-1 GPS Parts and Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .274
D-1 TimeCreator 1000 Mechanical Specifications . . . . . . . . . . . . . . . . . . . . . .284
D-2 TimeCreator 1000 Environmental Specifications. . . . . . . . . . . . . . . . . . . .284
D-3 TimeCreator 1000 Power Specifications . . . . . . . . . . . . . . . . . . . . . . . . . .285
D-4 Serial Port Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .285
D-5 LAN Port Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .286
D-6 Input Signal Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .286
D-7 Output Signal Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .286
D-8 Antenna Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .287
D-9 GPS and DTI Port Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .287
D-10 IMC and Communication Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . .288
D-11 GPS and DTI Port Alarm Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . .290
14 TimeCreator 1000 User’s Guide 097-93100-01 Revision C – February, 2010
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
097-93100-01 Revision C – February, 2010 TimeCreator 1000 User’s Guide 15
How to Use This Guide
Purpose of This Guide
Purpose of This Guide
The TimeCreator 1000 User’s Guide describes the procedures for unpacking,
installing, using, maintaining, and troubleshooting the Symmetricom TimeCreator
1000 DOCSIS Timing Interface Server (TimeCreator 1000). It also includes
appendixes that describe alarms and events, the languages that you use to
communicate with the TimeCreator 1000, default values, and other information.
Who Should Read This Guide
Chapter 1, Overview of the TimeCreator 1000, is written for non-technical
audiences who need general information about the product. Chapter 2, Engineering
and Ordering Procedures, 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’s Guide is designed for the following categories of users:
Systems Engineers – Chapter 1 provides an introduction to the TimeCreator
1000, 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 appendixes
provide detailed information and procedures to ensure proper installation,
operation, and configuration of the TimeCreator 1000.
Maintenance Engineers – Chapter 6 and the appendixes 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 TimeCreator 1000 system, others, such as Chapter 2 through Chapter 6 contain
detailed information and instructions which are intended to be performed by
qualified personnel only.
16 TimeCreator 1000 User’s Guide 097-93100-01 Revision C – February, 2010
Structure of This Guide
This guide contains the following sections and appendixes:
Chapter, Title Description
How to Use This Guide
Structure of This Guide
Chapter 1, Overview of the
TimeCreator 1000
Chapter 2, Engineering and
Ordering Procedures
Chapter 3, Installing the
TimeCreator 1000
Chapter 4, General Guidelines for
using the Symmetricom
TimeCreator 1000
Chapter 5, Provisioning Describes the commands and procedures required to provision the
Chapter 6, Maintenance and
Troubleshooting
Appendix A, Alarms, Events and
SNMP Traps
Appendix B, Command
Descriptions and
Communications Interface
Appendix C, Installing the
Two-Way GPS Antenna
Provides an overview of the product, describes the major
hardware and software features, and list s the system
specifications.
Lists the part number and ordering procedure for all TimeCreator
1000 parts and accessories.
Contains procedures for unpacking and installing the system, and
for powering up the unit.
Provides basic information to which users can refer to ensure
proper system operation.
TimeCreator 1000 after installing the unit.
Contains preventive and corrective maintenance, and
troubleshooting procedures for the product.
Lists the alarms and events and provides basic indications of the
source of the alarm.
Describes the CLI command conventions, functions, and features
and the SNMP, NTP, SSH, and SFTP protocols.
Provides procedures for installing a GPS antenna and connecting
it to the TimeCreator 1000.
Appendix D, Specifications and
Factory Defaults
Appendix E, Software Licenses
Index Provides references to individual topics within this gu ide.
097-93100-01 Revision C – February, 2010 TimeCreator 1000 User’s Guide 17
Lists the specifications for the TimeCreator 1000.
Contains licensing information for third party software.
How to Use This Guide
Conventions Used in 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...
TimeCreator 1000 User’s
The title of a document.
... it means:
Guide
CRITICAL An operating mode, alarm state, status, or chassis label.
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.
Username: Text in a source file or a system prompt or other text that
appears on a screen.
ping
status
A command you enter at a system prompt or text you
enter in response to a program prompt. You must enter
commands for case-sensitiv e operating systems exactly
as shown.
qualified personnel A word or term being emphasized.
Symmetricom does not
A word or term given special emphasis.
recommend...
18 TimeCreator 1000 User’s Guide 097-93100-01 Revision C – February, 2010
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 disregar d 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, opera tion,
or maintenance procedures, practices, conditions, or statements, that
alert you to important information, which may make your task easier
or increase your understanding.
097-93100-01 Revision C – February, 2010 TimeCreator 1000 User’s Guide 19
How to Use This Guide
Related Documents and Information
Related Documents and Information
See your Symmetricom representative or sales office for a complete list of available
documentation.
Note: Symmetr icom offers training cour ses designed to enhance your
knowledge of the TimeCreator 1000. Contact your local
representative or sales office for a complete list of courses and
outlines.
Where to Find Answers to Product and Document Questions
For additional information about the products described in this guide, please cont act
your Symmetricom representative or your local sales office. You can also contact us
on the web at www.symmetricom.com.
What’s New In This Guide
Added “Managing the IP Address Whitelist” section to Chapter 5.
Added “Provisioning Root Server Recovery Modes” section to Chapter 5.
Modified commands in Appendix B:
Set Authentication radius radiusserveraddress:port
Set Configuration restoreuser IMC
Set Configuration restoreuser IOC
Show Logged-in-user
Set Recvconfig IMC user@host:file
Set Recvconfig IOC user@host:file
Set Remote-syslog
Show Remote-syslog
Show Root-recovery status
Show Root-recovery config
Set Root-recovery autorecoverymode
Set Root-recovery rapidrecovery
20 TimeCreator 1000 User’s Guide 097-93100-01 Revision C – February, 2010
Set Sendconfig IMC user@host:file
Set Sendconfig IOC user@host:file
Show SNMP accessv2
Set SNMP accessv2
Set SNMP accessv2 Rocommunity
Set SNMP accessv2 Rwcommunity
Show SNMP accessv3
Set SNMP accessv3
Show Whitelist
Set Whitelist
Deleted CLI commands in Appendix B:
History
Clear log
How to Use This Guide
What’s New In This Guide
097-93100-01 Revision C – February, 2010 TimeCreator 1000 User’s Guide 21
How to Use This Guide
What’s New In This Guide
22 TimeCreator 1000 User’s Guide 097-93100-01 Revision C – February, 2010
Chapter 1 Overview of the TimeCreator 1000
This chapter provides introductory information for the TimeCreator 1000.
In This Chapter
Overview
Performance Monitoring
Physical Description
Functional Description
Communication Ports
Outputs
Reference Inputs and TOD Sources
Alarms
097-93100-01 Revision C – February, 2010 TimeCreator 1000 User’s Guide 23
Chapter 1 Overview of the TimeCreator 1000
Overview
Overview
The TimeCreator 1000, shown in Figure 1-2, is a DOCSIS Timing Interface (DTI)
Server that delivers accurate timestamp and frequency synchronization, and with
GPS it can also provide Time of Day (TOD) to DTI client elements in a Modular
Cable Modem Termination System (M-CMTS) architecture. M-CMTS elements
shown in Figure 1-1 (Edge QAMs, Upstream Receivers, M-CMTS Core, etc.) use
DTI to synchronize the DOCSIS Timestamp and Symbol Clock used in the DOCSIS
communications between modems and the headend/hub. The TimeCreator 1000
functions as either a root server or subtending server . The root server is at the top of
a server hierarchy and is the source of traceable time and frequency for all
subtending DTI servers and clients in a building. The subtending server receives its
time and frequency reference through a direct connection to a root se rver’s DTI link
connector; a subtending server cannot be referenced to another subtending server.
Figure 1-1. DTI Server Hierarchy and M-CMTS Elements
24 TimeCreator 1000 User’s Guide 097-93100-01 Revision C – February, 2010
Chapter 1 Overview of the TimeCreator 1000
Overview
A TimeCreator 1000 in a root server configuration can use either its internal clock as
the master frequency for the headend/hub meeting DOCSIS specifications, or it can
be configured to use GPS. GPS is required for Business Services over DOCSIS
(BSoD), which allows you to deliver T1, E1, and NxDSO emulation services. GPS is
also required to implement Network Time Protocol (NTP) server mode, which allows
common time between headends/hub and other applications. NTP, the
user-specified time, and the IMC’s real-time clock (RTC) can also be used as a
basis for the DOCSIS timestamp to provide system TOD for operation in free-run
mode only.
The TimeCreator 1000 features include:
10+2 DTI Ports
– 10 standard DTI Client Connections (6 for 8-port option)
– 2 dual mode DTI Connections for use as a standard DTI Client Connection
or input from a Root DTI Server with Carrier-Class Performance
Optional High Reliability Redundant Operation
SNMP and CLI management over SSH, Telnet and Craft port
DTI Client Health Monitoring
NTP Server Option
TOD and BSoD Support (requires GPS input)
Compact 1RU Design
AC and DC Power Options
Subtending of up to Twelve DTI Servers
DTI Server Configurable with Dual Path Protection and 24 Hour Holdover
Software Upgradeable
Figure 1-2. TimeCreator 1000 Front View
Figure 1-3. TimeCreator 1000 Rear View
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Chapter 1 Overview of the TimeCreator 1000
Overview
Shelf
The TimeCreator 1000 shelf requires a minimum of three plug-in modules to
operate:
Power Supply module
Input/Output/Clock (IOC) module
Information Management Card (IMC) module.
It is recommended that a second Power Supply module and IOC are added to the
configuration for redundant operation. Since the TimeCreator 1000 provides the
Master DOCSIS Clock and Timestamp for the entire Headend or Hub site, it is
designed to provide high reliability through redundancy, although redundancy is not
required. The flexibility of configuration and therefore cost enables various
deployment scenarios for root, slave, and protected architectures.
Input Signals
The TimeCreator 1000 can use either GPS or DTI signals as external input
references to acquire the system’s frequency, DTI timestamp, and TOD alignment.
NTP and the user-specified time from the IMC’s real-time clock (RTC) can also
provide system TOD with much less accuracy. See Table 1-1 for descriptions. Only
GPS can provide a common timestamp across the network for a distributed
M-CMTS deployment. It is suggested that all root TimeCreator 1000 servers be
configured with GPS. Upgrading any DTI Server from a user time or NTP time to
GPS for BSoD or distributed M-CMTS architectures will require resetting the
DOCSIS Timestamp and thus re-range all cable modems. The GPS input conn ects
to the TNC connector on the IMC and the DTI input from a root DTI Server connects
to the rear panel port A and port B RJ-45 connectors (labeled A/11 and B/12). NTP
runs on the IMC’s management Ethernet port.
Note: When ports A/11 and B/12 are provisioned as outputs, they are
referenced as Ports 11 and 12.
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Chapter 1 Overview of the TimeCreator 1000
Table 1-1. TimeCreator 1000 Input Signal Source
Input Source Description
GPS GPS antenna used to acquire the system’s frequency, DTI
timestamp, and TOD.
DTI External DTI signals used as external input references to acquire the
system’s frequency, DTI timestamp, and TOD.
NTP NTP server used to acquire the TOD. Frequency is provided by IOC’s
clock in freerun mode.
Real-Time Clock Clock on IMC used to acquire the TOD. Frequency is provided by
IOC’s clock in freerun mode.
Overview
USER User manually enters TOD. Frequency is provided by IOC’s clock in
freerun mode.
DTI Input Priority Level
You can assign a priority level to each DTI input and the value determines which
input is used as the system reference. The range is 1 to 5 and the lower the priority
level, the higher the priority. Use the Set Interface Priority command to provision
these parameters.
Setting the Input Reference Switching Mode
The DTI reference selection at ports A and B can be either revertive or non-revertive
(see Provisioning Revertive and Non-Revertive Mode, on page 94). In the revertive
mode, if an input used as the system reference is disqualified (for any reason), the
reference switches to the next-highest input and reverts to the initial input when that
input is re-qualified. In this mode, the reference switches two times: once when the
disqualifying event occurs, and again when the initial input is re-qualified. In the
non-revertive mode, the system reference switches to the next-highest input but
does not revert to the initial input when the initial input is re-qualified. The system
reference switches only once when the disqualifying event occurs. Revertive mode
is used when the port priorities are different and non-revertive mode is used when
the priorities are the same.
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Chapter 1 Overview of the TimeCreator 1000
Overview
Output Signals
The TimeCreator 1000 passes frequency and TOD output through rear panel DTI
links. Ports 1 through 10 (12-port version) or Ports 1 through 6 (8-port option) are
permanent output ports. Ports A/11 and B/12 can be provisioned as either outputs
or inputs.
Note: When ports A/11 and B/12 are provisioned as inputs, they are
referenced as ports A and B.
Communications Ports
The EIA-232 serial and Ethernet connections are located on the IMC. The EIA-232
serial and Ethernet connections allow you to provision the system from a terminal or
computer running a terminal emulation application.
Local Craft Serial Port
The EIA-232 port supports local control; you can configure the TimeCreator 1000
with commands using a terminal or personal computer (PC) with terminal emulation
software (see Communicating Through the Serial Port, on page 72). The connect or
is located on the IMC. The Local port is configured as a DCE interface and the
default specifications are as follows:
8 data bits
1 stop bit
no parity
9600 baud rate (57600 is supported only in the IMC rev H version 1.00.13 or
below)
Flow Control: None
Ethernet
An Ethernet connector provides connectivity to a local area network (LAN) and each
port can be assigned a unique internet protocol (IP) address (see Communicating
Through the Ethernet Port, on page 72). Once the IP address is set and a
connection is made, you can access the TimeCreator 1000 on an intranet. The
Ethernet port supports two simultaneous connections to port 23.
28 TimeCreator 1000 User’s Guide 097-93100-01 Revision C – February, 2010
Chapter 1 Overview of the TimeCreator 1000
Overview
Clock Design
The TimeCreator 1000 clock design inclu des a highly stable ovenized Quartz crystal
to produce accurate synchronization outputs. In a dual-IOC configuration, the clock
function is redundant to provide protection. Each IOC qualifies the input signal and
filters jitter and wander noise elements that may exist. In the event that all input
references are lost or disqualified, the unit goes into holdover mode with the
oscillator providing the system reference.
The IOC meets Type III performance.
Operating Modes
The TimeCreator 1000 has the following operating modes:
Warm-up – The period immediately following power-up that allows local
oscillator stabilization required for stable frequency generation from the system.
Free-run – This operating mode allows the system to generate a DTI output that
has stable generation of frequency and TOD when the system has no external
frequency reference (GPS or DTI). TOD can be from NTP, a user-specified time,
or from the IMC’s real-time clock.
Fast-Lock (Acquire) – In this mode the system quickly locks the local oscillator
frequency to another frequency source (GPS or DTI reference) to establish the
system’s frequency and TOD.
Normal (Locked) – In this operating mode, the system’s output frequency and
TOD are tracking the reference frequency (GPS or DTI) and TOD within the DTI
specified requirements.
Bridging – If all input references are lost, the TimeCreator 1000 goes into
bridging mode. In this mode, the outputs continue to provide accurate timing fo r a
limited period. If the system qualifies the reference prior to the end of the bridging
time, the system re-enters Fast-Lock or Normal operation mode. If the inputs are
not re-qualified before the bridging time has elapsed, the TimeCreator 1000
enters holdover mode.
Holdover – If the reference signal is lost and not re-qualified when the bridging
time elapses, the clock enters holdover mode. The accuracy of the TimeCreator
1000 output is then dependent on the quality level of the oscillator.
Extended Holdover – If the clock remains in holdover for an extended duration,
typically 4 hours, the clock enters extended holdover mode.
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Chapter 1 Overview of the TimeCreator 1000
Performance Monitoring
Frequency Mode – In this operating mode, the system's frequency is tracking
the reference frequency (GPS). In this mode, a user can add a GPS reference to
the TimeCreator 1000 and use the frequency from GPS to meet BSoD
specifications without re-setting the DOCSIS Timestamp and causing a
re-ranging of the cable modems.
Note: In Frequency Mode, DTI output and IMC GPS are not in sync.
Performance Monitoring
Server Status Monitoring
DTI client status log files provide information on client status, oscillator type, and the
server’s cable advance flag and cable advance value.
Phase Measurements
TheTimeCreator 1000 measures phase data. Peak to peak jitter and MTIE results
are calculated for the user. Frame error rate (FER) is also calculated and made
available to the user. It is calculated over a 10-second window.
MTIE Calculations
MTIE is a measure of the relative noisiness of a signal that relates to frequency
offsets and phase transients. The TimeCreator 1000 automatically calculates MTIE
for each enabled input from the most recent 1000 seconds. From this calculation,
you can retrieve MTIE values for 35-second and user-configurable windows. You
can set an alarm threshold for each of these windows; if the MTIE value exceeds
this threshold and the alarm is enabled, the TimeCreator 1000 generates an alarm.
Physical Description
The TimeCreator 1000 consists of a 19-inch (48 cm) rack mount shelf, plug-in
modules, AC power supply cables and optional GPS cables, and hardware.
Note: 23-inch (58.42 cm) rack mounting brackets are also available
as a separately ordered item.
30 TimeCreator 1000 User’s Guide 097-93100-01 Revision C – February, 2010
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