Spectracom NetClock 9400 Series Product information sheet

NetClock®9400 Series
Time Server
User Reference Guide
Document Part No.: 1209-5000-0050
Revision: 16
Date: 28-Aug-2017
spectracom.com

© 2009-2017 Spectracom. All rights reserved.
The information in this document has been carefully reviewed and is
believed to be accurate and up-to-date. Spectracom assumes no respons
ibility for any errors or omissions that may be contained in this document,
and makes no commitment to keep current the information in this manual, or
to notify any person or organization of updates. This User Reference Guide
is subject to change without notice. For the most current version of this doc
umentation, please see our web site at spectracom.com.
Spectracom reserves the right to make changes to the product described in
this document at any time and without notice. Any software that may be
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license agreement or nondisclosure agreement. The software may be used
or copied only in accordance with the terms of those agreements.
No part of this publication may be reproduced, stored in a retrieval sys
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chaser's personal use without the written permission of Spectracom
Other products and companies referred to herein are trademarks or
registered trademarks of their respective companies or mark holders.
Orolia USA, Inc. dba Spectracom
• 1565 Jefferson Road, Suite 460, Rochester, NY 14623 USA
• 3, Avenue du Canada, 91974 Les Ulis Cedex, France
• Room 208, No. 3 Zhong Guan Village South Road, Hai Dian District, Beijing 100081, China
Do you have questions or comments regarding this User Reference Guide?
èE-mail:
Warranty Information
For a copy of Spectracom's Limited Warranty policy, see the Spectracom
website: http://spectracom.com/support/warranty-information.
NetClock User Reference Guide I

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II NetClock User Reference Guide

CONTENTS
NetClock User Reference Guide • TABLE OF CONTENTS III
CHAPTER 1
Product Description 1
1.1 Getting Started 2
1.2 Introduction 2
1.3 NetClock 9483 Overview 2
1.3.1 NENA Standards Compliance & Support 3
1.3.2 Security Enhancements 4
1.4 NetClock 9489 Overview 4
1.5 Inputs & Outputs 4
1.5.1 NetClock 9483: Standard Outputs 4
1.5.2 NetClock 9483: Optional Outputs 5
1.5.3 NetClock 9489 Standard Inputs and Outputs 5
1.6 NetClock 9400 Series Front Panels 6
1.6.1 NetClock 9483 Front Panel 6
1.6.2 NetClock 9489 Front Panel 6
1.6.3 Front Panel Keypad, and Display 6
1.6.3.1 Using the Keypad 7
1.6.3.2 Navigating the Front Panel Display 7
1.6.4 Status LEDs 8
1.7 NetClock 9400 Series Rear Panels 10
1.7.1 NetClock 9483 Rear Panel 10
1.7.2 NetClock 9489 Rear Panel 11
1.8 NetClock 9483—Available Option Modules 13
1.8.1 T1 (1.544 MHz) and E1 (2.048 MHz) Module 13
1.8.2 Multi-Port Gigabit Ethernet Module 13
1.9 The NetClock Web UI 15
1.9.1 The Web UI HOME Screen 15
1.9.2 The INTERFACES Menu 16
1.9.3 The Configuration MANAGEMENT Menu 17
1.9.4 The TOOLS Menu 18
1.10 Specifications 19

1.10.1 Input Power 19
1.10.1.1 Fuses 19
1.10.2 GNSS Receiver 20
1.10.3 RS-232 Serial Port (Front Panel) 20
1.10.4 RS-232 Serial Port (Rear Panel; NetClock 9483 Only) 21
1.10.5 RS-485 Serial Port 21
1.10.6 10/100 Ethernet Port 21
1.10.7 IRIG Output (NetClock 9483 Only) 21
1.10.8 Protocols Supported 21
1.10.9 1PPS Output 22
1.10.10 10 MHz Output (NetClock 9483 Only) 22
1.10.10.1 10 MHz Output — Oscillator Phase Noise (dBc/Hz) 23
1.10.11 Mechanical and Environmental Specifications 23
1.11 Regulatory Compliance 24
CHAPTER 2
SETUP 27
2.1 Overview 28
2.1.1 Main Installation Steps 28
2.2 Unpacking and Inventory 29
2.3 Required Tools and Parts 29
2.3.1 Required GNSS Antenna Components 30
2.4 SAFETY 31
2.4.1 Safety: Symbols Used 31
2.4.2 SAFETY: Before You Begin Installation 31
2.4.3 SAFETY: User Responsibilities 34
2.4.4 SAFETY: Other Tips 34
2.5 Mounting the Unit 34
2.5.1 Rack Mounting 34
2.6 Connecting Supply Power 36
2.6.1 Power Source Selection 36
2.6.2 Using AC Input Power 37
2.6.3 Using DC Input Power (NetClock 9483 Only) 37
2.7 Connecting the GNSS Input 40
2.8 Connecting Network Cables 40
IV NetClock User Reference Guide • TABLE OF CONTENTS

2.9 Connecting Inputs and Outputs 41
2.10 Powering Up the Unit 41
2.11 Setting up an IP Address 42
2.11.1 Dynamic vs. Static IP Address 43
2.11.2 Assigning a Static IP Address 44
2.11.2.1 Assigning a New Static IP Address 44
2.11.2.2 Setting Up an IP Address via the Front Panel 47
2.11.2.3 Setting Up a Static IP Address via a DHCP Network 49
2.11.2.4 Setting Up an IP Address via the Serial Port 50
2.11.2.5 Setting up a Static IP Address via Ethernet Cable 51
2.11.3 Setting Up a Temporary IP Address Remotely 51
2.11.4 Subnet Mask Values 53
2.12 Accessing the WebUI 53
2.13 Connecting Reference Inputs and Network Interface 55
2.14 Configuring Network Settings 56
2.14.1 General Network Settings 58
2.14.2 Network Ports 59
2.14.3 Network Services 62
2.14.4 Static Routes 64
2.14.5 Access Rules 66
2.14.6 HTTPS 67
2.14.6.1 Accessing the HTTPS Setup Window 67
2.14.6.2 About HTTPS 68
2.14.6.3 Supported Certificate Formats 69
2.14.6.4 Creating an HTTPS Certificate Request 69
2.14.6.5 Requesting an HTTPS Certificate 73
2.14.6.6 Uploading an X.509 PEM Certificate Text 75
2.14.6.7 Uploading an HTTPS Certificate File 76
2.14.7 SSH 77
2.14.8 SNMP 84
2.14.8.1 SNMP V1/V2c 88
2.14.8.2 SNMP V3 89
2.14.8.3 SNMP Traps 91
2.14.9 System Time Message 93
2.14.9.1 System Time Message Format 94
2.15 Configuring NTP 95
NetClock User Reference Guide • TABLE OF CONTENTS V

2.15.1 Checklist NTP Configuration 96
2.15.2 The NTP Setup Screen 96
2.15.3 Dis-/Enabling NTP 99
2.15.4 Viewing NTP Clients 100
2.15.5 Restoring the Default NTP Configuration 100
2.15.6 NTP Output Timescale 101
2.15.7 NTP Reference Configuration 103
2.15.7.1 The NTP Stratum Model 103
2.15.7.2 Configuring "NTP Stratum 1" Operation 103
2.15.7.3 Configuring "NTP Stratum Synchronization" 104
2.15.8 NTP Servers and Peers 105
2.15.8.1 The NTP Servers and NTP Peers Panels 107
2.15.8.2 NTP Servers: Adding, Configuring, Removing 108
2.15.8.3 NTP Peers: Adding, Configuring, Removing 110
2.15.9 NTP Authentication 112
2.15.9.1 NTP Autokey 112
2.15.9.2 NTP: Symmetric Keys (MD5) 118
2.15.10 NTP Access Restrictions 120
2.15.11 Enabling/Disabling NTP Broadcasting 122
2.15.12 NTP over Anycast 123
2.15.12.1 Configuring NTP over Anycast (General Settings) 124
2.15.12.2 Configuring NTP over Anycast (OSPF IPv4) 125
2.15.12.3 Configuring NTP over Anycast (OSPF IPv6) 126
2.15.12.4 Configuring NTP over Anycast (BGP) 127
2.15.12.5 Configuring Anycast via NTP Expert Mode 128
2.15.12.6 Testing NTP over Anycast 131
2.15.13 NTP Orphan Mode 131
2.15.14 Host Disciplining 132
2.15.14.1 Enabling Host Disciplining 132
2.15.15 NTP Expert Mode 133
2.15.16 Spectracom Technical Support for NTP 136
2.16 Configuring Input References 137
2.17 Configuring Outputs 137
2.17.1 The Outputs Screen 138
2.17.2 The 1PPS and 10MHz Outputs 139
2.17.2.1 Configuring a 1PPS Output 140
2.17.2.2 Configuring the 10 MHz Output (NetClock 9483 Only) 141
VI NetClock User Reference Guide • TABLE OF CONTENTS

2.17.3 Configuring Optional Outputs 141
2.17.4 Network Ports 141
2.17.5 Signature Control 141
CHAPTER 3
MANAGING TIME 145
3.1 The Time Management Screen 146
3.2 System Time 147
3.2.1 System Time 148
3.2.1.1 Configuring the System Time 148
3.2.1.2 Timescales 149
3.2.1.3 Manually Setting the Time 150
3.2.1.4 Using Battery Backed Time on Startup 152
3.2.2 Timescale Offset(s) 154
3.2.2.1 Configuring a Timescale Offset 154
3.2.3 Leap Seconds 155
3.2.3.1 Reasons for a Leap Second Correction 155
3.2.3.2 Leap Second Alert Notification 156
3.2.3.3 Leap Second Correction Sequence 156
3.2.3.4 Configuring a Leap Second 157
3.2.4 Local Clock(s), DST 157
3.2.4.1 Adding a Local Clock 158
3.2.4.2 DST Examples 160
3.2.4.3 DST and UTC, GMT 161
3.3 Managing Input References 161
3.3.1 Input Reference Priorities 161
3.3.1.1 Configuring Input Reference Priorities 163
3.3.1.2 The "Local System" Reference 166
3.3.1.3 The "User/User" Reference 167
3.3.1.4 Reference Priorities: EXAMPLES 169
3.3.2 Reference Qualification and Validation 172
3.3.2.1 Reference Monitoring: Phase 172
3.3.2.2 Smart Reference Monitoring 173
3.3.2.3 BroadShield 174
3.3.3 The GNSS Reference 182
3.3.3.1 Reviewing the GNSS Reference Status 183
3.3.3.2 Determining Your GNSS Receiver Model 187
NetClock User Reference Guide • TABLE OF CONTENTS VII

3.3.3.3 Selecting a GNSS Receiver Mode 189
3.3.3.4 Setting GNSS Receiver Dynamics 192
3.3.3.5 Performing a GNSS Receiver Survey 194
3.3.3.6 GNSS Receiver Offset 195
3.3.3.7 Resetting the GNSS Receiver 197
3.3.3.8 Deleting the GNSS Receiver Position 197
3.3.3.9 Manually Setting the GNSS Position 199
3.3.3.10 GNSS Constellations 202
3.3.3.11 A-GPS 205
3.4 Holdover Mode 210
3.5 Managing the Oscillator 213
3.5.1 Oscillator Types 214
3.5.2 Configuring the Oscillator 215
3.5.2.1 Time Figure of Merit (TFOM) 217
3.5.3 Monitoring the Oscillator 218
3.5.4 Oscillator Logs 221
CHAPTER 4
SYSTEM ADMINISTRATION 223
4.1 Powering Up/Shutting Down 224
4.1.1 Powering Up the Unit 224
4.1.2 Shutting Down the Unit 225
4.1.3 Issuing the HALT Command Before Removing Power 225
4.1.4 Rebooting the System 226
4.2 Notifications 227
4.2.1 Configuring Notifications 228
4.2.2 Notification Event Types 230
4.2.2.1 Timing Tab: Events 230
4.2.2.2 GPS Tab: Events 230
4.2.2.3 System Tab: Events 231
4.2.3 Configuring GPS Notification Alarm Thresholds 231
4.2.4 Setting Up SNMP Notifications 232
4.2.5 Setting Up Email Notifications 233
4.3 Managing Users and Security 235
4.3.1 Managing User Accounts 235
4.3.1.1 Types of Accounts 235
4.3.1.2 About "user" Account Permissions 235
VIII NetClock User Reference Guide • TABLE OF CONTENTS

4.3.1.3 Rules for Usernames 237
4.3.1.4 Adding/Deleting/Changing User Accounts 237
4.3.2 Managing Passwords 239
4.3.2.1 Configuring Password Policies 240
4.3.2.2 The Administrator Password 240
4.3.2.3 Lost Password 241
4.3.3 LDAP Authentication 244
4.3.4 RADIUS Authentication 250
4.3.4.1 Enabling/Disabling RADIUS 250
4.3.4.2 Adding/Removing a RADIUS Server 251
4.3.5 TACACS+ Authentication 253
4.3.5.1 Enabling/Disabling TACACS+ 253
4.3.5.2 Adding/Removing a TACACS+ Server 253
4.3.6 HTTPS Security Levels 254
4.3.7 Unlocking the Keypad via Keypad 256
4.3.8 If a Secure Unit Becomes Inaccessible 256
4.4 Miscellanous Typical Configuration Tasks 256
4.4.1 Web UI Timeout 256
4.4.2 Configuring the Front Panel 257
4.4.3 Displaying Local Time 261
4.4.4 Creating a Login Banner 261
4.4.5 Show Clock 262
4.4.6 Configuring an External Display Clock 263
4.4.7 Product Registration 265
4.4.8 Synchronizing Network PCs 266
4.4.9 Selecting the UI Language 266
4.5 Quality Management 266
4.5.1 System Monitoring 266
4.5.1.1 Status Monitoring via Front Panel 266
4.5.1.2 Status Monitoring via the Web UI 267
4.5.1.3 Status Monitoring of Input References 270
4.5.1.4 Reference Monitoring: Phase 272
4.5.1.5 Smart Reference Monitoring 273
4.5.1.6 Ethernet Monitoring 274
4.5.1.7 Outputs Status Monitoring 275
4.5.1.8 Monitoring the Oscillator 278
4.5.1.9 Monitoring the Status of Option Modules 281
NetClock User Reference Guide • TABLE OF CONTENTS IX

4.5.1.10 NTP Status Monitoring 283
4.5.1.11 Temperature Management 288
4.5.2 Logs 294
4.5.2.1 Types of Logs 295
4.5.2.2 Local and Remote Logs 299
4.5.2.3 The Logs Screen 299
4.5.2.4 Displaying Individual Logs 301
4.5.2.5 Saving and Downloading Logs 302
4.5.2.6 Configuring Logs 304
4.5.2.7 Setting up a Remote Log Server 306
4.5.2.8 Restoring Log Configurations 308
4.5.2.9 Clearing All Logs 309
4.5.2.10 Clearing Selected Logs 309
4.6 Updates and Licenses 310
4.6.1 Software Updates 310
4.6.2 Applying a License File 312
4.7 Resetting the Unit to Factory Configuration 313
4.7.1 Resetting All Configurations to their Factory Defaults 313
4.7.2 Backing-up and Restoring Configuration Files 314
4.7.2.1 Accessing the System Configuration Screen 314
4.7.2.2 Saving the System Configuration Files 316
4.7.2.3 Uploading Configuration Files 317
4.7.2.4 Restoring the System Configuration 318
4.7.2.5 Restoring the Factory Defaults 318
4.7.3 Cleaning the Configuration Files and Halting the System 319
4.7.4 Default and Recommended Configurations 319
4.7.5 Sanitizing the Unit 320
4.7.5.1 Physically Removing the CF Card 321
4.7.5.2 Cleaning/Restoring 321
4.7.5.3 Removing Other Files From the CF Card 321
4.7.5.4 Further Reading 322
APPENDIX
Appendix 323
5.1 Troubleshooting 324
5.1.1 Troubleshooting Using the Status LEDs 324
5.1.2 Minor and Major Alarms 325
XNetClock User Reference Guide • TABLE OF CONTENTS

5.1.3 Troubleshooting: System Configuration 326
5.1.3.1 System Troubleshooting: Browser Support 327
5.1.4 Troubleshooting – Unable to Open Web UI 327
5.1.5 Troubleshooting via Web UI Status Page 328
5.1.6 Troubleshooting GNSS Reception 330
5.1.7 Troubleshooting – Keypad Is Locked 331
5.1.8 Troubleshooting – 1PPS, 10 MHz Outputs 331
5.1.9 Troubleshooting – Blank Information Display 332
5.1.10 Troubleshooting the Front Panel Serial Port 333
5.1.11 Troubleshooting the Front Panel Cooling Fan 333
5.1.12 Troubleshooting – Network PCs Cannot Sync 334
5.1.13 Troubleshooting Software Update 334
5.2 Option Modules 335
5.2.1 NetClock 9483 Option Modules 335
5.2.2 NetClock 9489 In-/Outputs 336
5.2.2.1 1PPS Output 336
5.2.2.2 ASCII Time Code RS-485 Outputs and Input 337
5.2.3 Accessing Option Module Settings via the WebUI 341
5.2.3.1 Web UI Navigation: Option Modules 342
5.2.3.2 Viewing Input/Output Configuration Settings 343
5.2.3.3 Configuring Option Module Inputs/Outputs 344
5.2.3.4 Viewing an Input/Output Signal State 346
5.2.3.5 Verifying the Validity of an Input Signal 347
5.2.4 NENA-Compliant Module 348
5.2.4.1 NENA-Compliant Module: Specifications 349
5.2.4.2 IRIG Output Specifications 349
5.2.4.3 ASCII RS-232 Specifications 350
5.2.4.4 ASCII RS-485 and Alarms/Relays Specifications 351
5.2.4.5 Configuring the IRIG Time Code Output 353
5.2.4.6 Configuring an ASCII Time Code Output (RS-232 or RS-485) 355
5.2.4.7 Configuring the Relay/Alarm Output 358
5.2.5 Gigabit Ethernet Module [Option 16] 359
5.2.5.1 Gigabit Ethernet Module: Specifications 359
5.2.5.2 Network Setup 360
5.2.5.3 Routing Tables 360
5.2.6 T1/E1 Out Module [Option 13] 361
5.2.6.1 Module Option 13 E1/T1 (120 Ω): Specifications 362
NetClock User Reference Guide • TABLE OF CONTENTS XI

5.2.6.2 E1/T1 Output: Edit Window 363
5.2.6.3 E1/T1 Output: Status Window 364
5.2.7 PTP Grandmaster [1204-32] 365
5.2.7.1 PTP Grandmaster [-32]: Specifications 365
5.2.7.2 PTP Grandmaster [-32]: Edit Window 366
5.2.7.3 PTP Grandmaster [-32]: Status Window 371
5.2.7.4 Configuration — General Steps 375
5.2.7.5 Configuration — PTP-Specific Steps 376
5.3 Command-Line Interface 380
5.3.1 Setting up a Terminal Emulator 381
5.3.2 CLICommands 382
5.4 ASCIITime Code Data Formats 387
5.4.1 NMEA GGA Message 387
5.4.2 NMEA RMC Message 388
5.4.3 NMEA ZDA Message 389
5.4.4 Spectracom Format 0 389
5.4.5 Spectracom Format 1 391
5.4.6 Spectracom Format 1S 392
5.4.7 Spectracom Format 2 394
5.4.8 Spectracom Format 3 396
5.4.9 Spectracom Format 4 398
5.4.10 Spectracom Format 7 399
5.4.11 Spectracom Format 8 401
5.4.12 Spectracom Format 9 402
5.4.12.1 Format 9S 403
5.4.13 Spectracom Epsilon Formats 403
5.4.13.1 Spectracom Epsilon TOD1 403
5.4.13.2 Spectracom Epsilon TOD3 404
5.4.14 BBC Message Formats 405
5.4.14.1 Format BBC-01 405
5.4.14.2 Format BBC-02 406
5.4.14.3 Format BBC-03 PSTN 407
5.4.14.4 Format BBC-04 409
5.4.14.5 Format BBC-05 (NMEA RMC Message) 410
5.4.15 GSSIP Message Format 410
5.4.16 EndRun Formats 411
5.4.16.1 EndRun Time Format 411
XII NetClock User Reference Guide • TABLE OF CONTENTS

5.4.16.2 EndRunX (Extended) Time Format 412
5.5 IRIG Standards and Specifications 413
5.5.1 About the IRIG Output Resolution 413
5.5.2 IRIG Carrier Frequencies 414
5.5.3 IRIG B Output 418
5.5.3.1 FAA IRIG B Code Description 421
5.5.4 IRIG E Output 425
5.5.5 IRIG Output Accuracy Specifications 429
5.6 Technical Support 429
5.6.1 Regional Contact 430
5.7 Return Shipments 430
5.8 License Notices 431
5.8.1 NTPv4.2.6p5 431
5.8.2 OpenSSH 434
5.8.3 OpenSSL 437
5.9 List of Tables 442
5.10 List of Images 443
5.11 Document Revision History 443
INDEX
NetClock User Reference Guide • TABLE OF CONTENTS XIII

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XIV NetClock User Reference Guide • TABLE OF CONTENTS

CHAPTER 1•NetClock User Reference Guide 1
CHAPTER 1
Product Description
The Chapter presents an overview of the NetClock 9400 Series Time
Server, its capabilities, main technical features and specifications.
The following topics are included in this Chapter:
1.1 Getting Started 2
1.2 Introduction 2
1.3 NetClock 9483 Overview 2
1.4 NetClock 9489 Overview 4
1.5 Inputs & Outputs 4
1.6 NetClock 9400 Series Front Panels 6
1.7 NetClock 9400 Series Rear Panels 10
1.8 NetClock 9483—Available Option Modules 13
1.9 The NetClock Web UI 15
1.10 Specifications 19
1.11 Regulatory Compliance 24

1.1 Getting Started
Welcome to the NetClock User Reference Guide.
Where to start:
First-time users: "Introduction" below.
Users with some knowledge of Time and Frequency Servers: "Overview" on page28.
If your unit is up and running and you want to change a setting: "MANAGING TIME"
on page145, or "SYSTEM ADMINISTRATION" on page223.
1.2 Introduction
The NetClock®9400 Series combines Spectracom’s precision Time Server/Master Clock tech
nology and secure network-centric approach with a compact modular hardware design to
bring you a powerful time & frequency reference and synchronization system at the lowest cost
of ownership.
The NetClock 9400 product series is ideally suited for a variety of communications applic
ations such as Emergency Communications Centers that require extremely accurate timing and
frequency synchronization for their mission-critical systems, networks, and devices. The NetC
lock 9400 product series consists of two variants: The model 9483 is fully compliant with the
National Emergency Number Association (NENA) master clock standard, and the model 9489.
1.3 NetClock 9483 Overview
The NetClock 9483 has been designed specifically for these environments, and when using
GPS as its timing reference, the UTC (Coordinated Universal Time) time standard is employed,
thus allowing the NetClock 9483 to provide legally traceable time and frequency syn
chronization services for various related environments and equipment, such as the following:
2CHAPTER 1•NetClock User Reference Guide Rev. 16
1.1 Getting Started

9-1-1 and PSAP communication center telephony
Computer network synchronization
VOIP/voice and video recording
CAD
ANI/ALI controllers
Radio consoles and communications equipment
Display clocks
Security & building access systems, fire alarm systems
The NetClock 9483 also includes backwards-compatibility support with all previous generation
NetClock products; thus providing a bridge from legacy devices and equipment to network-
based systems.
The NetClock 9483 series is a truly flexible Time Server/Master Clock, which in addition to
providing highly accurate network time synchronization, also supports a variety of timecodes
(including all NENA formats) and signals to synchronize specific devices. The built-in network
port can be supplemented to include 3 additional Gigabit Ethernet (10/100/1000Base-T) ports
for synchronizing isolated networks, or for restricting administration to a specific management
network. Precise 10-MHz and 1-Pulse-per-second (1PPS) signals are standard features, and
additional optional features include support for T1/E1 signals are available for synchronizing
telecom systems and equipment, and Precision Timing Protocol (PTP) I/O support.
The unit is housed in a 19” rack unit chassis and offers an integrated power supply. DC power
is available as back-up to AC power, or as the primary input power source.
Note: All features described are not available on all NetClock 9400 Series vari
ants.
Initial setup of the NetClock 9483 can be done via its front panel serial port interface, and fur
ther management and configuration can be performed via NetClock’s Web-based user inter
face.
1.3.1 NENA Standards Compliance & Support
The NetClock Model 9483 is designed to meet or exceed the following NENA standards and
criteria:
NENA PSAP Master Clock Standard #04-002
NENA Security for Next-Generation 9-1-1 Standard (NG-SEC) #75-001
Note: Information regarding the configuration of the NetClock’s NENA module
can be found under "NENA-Compliant Module" on page348.
1.3 NetClock 9483 Overview
CHAPTER 1•NetClock User Reference Guide Rev. 16 3

1.3.2 Security Enhancements
In addition to fully supporting the NENA Security Standard #75-001, the NetClock 9400 series
are security-hardened network appliances designed to meet rigorous network security stand
ards and best practices. They ensure accurate timing through multiple references, tamper-proof
management, and include extensive logging capabilities for auditing purposes. All features,
interfaces, ports, and protocols can be enabled or disabled based on your network policies.
1.4 NetClock 9489 Overview
Spectracom’s NetClock Model 9489 delivers the same high precision timing benefits of the
NetClock 9483, and is ideally suited for delivering highly precise NTP timing for syn
chronizing systems, devices, and other communications equipment and devices.
In addition to providing a secure, high precision NTP platform, NetClock 9489 also provides
one (1) 1PPS output, two (2) RS-485 outputs, and (1) RS-484 input.
There are a number of commonly shared features between both the NetClock 9483 and 9489
models. However, the NetClock Model 9489 is designed to function primarily as an NTP
server, and therefore is somewhat less complex than the NetClock Model 9483. Also, NetClock
9489 is not fully compliant to NENA master clock technical requirements. As such, a majority of
this document applies to the NetClock Model 9483, except where otherwise noted.
1.5 Inputs & Outputs
Spectracom NetClock provides multiple outputs for use in networked systems and devices. GPS-
equipped NetClocks can track up to thirty-two GPS satellites simultaneously and synchronize to
the satellite’s atomic clocks. This enables NetClock-equipped computer networks to synchronize
all elements of network hardware and software over LANs or WANs – anywhere on the planet.
1.5.1 NetClock 9483: Standard Outputs
Standard outputs are:
4CHAPTER 1•NetClock User Reference Guide Rev. 16
1.4 NetClock 9489 Overview