Appendix a S100 Specifications 119 | Symmetricom specification

How many satellites are necessary for me to operate the S100? 111 How do I know if the satellite signal strength is good? 111

What is the maximum antenna cable length for use with the S100? 111

What are the available antenna cable lengths and antenna requirements? 111 What are some guidelines for correctly cutting the cable, using splitters, and

using cable connectors?

111

How many NTP requests can be processed by the S100 each second? 112

Does the S100 support NTP v4?

112

Can the S100 utilize a certificate from an external CA? 112 How is the interface to the S100 secured? 112

What security functions are provided with the S100? 112

Does the S100 support any functions to restrict user access to NTP service? Can the S100 set up clients' IP address to be connected? 112

What is the bandwidth utilization (TCP/IP) each time an NTP client gets a time

update from the NTP server?	112
Is NTP v4 compatible with Network Address Translation (NAT) gateways? 113
How does the S100 clock behave when a leap second is introduced? 113
How-to’s and Tips	113
How to install NTP v4 on a UNIX system 114
How to configure an NTP v4 client to connect to an NTP v4 server with the
autokey scheme	114
How to verify NTP v4 autokey client connectivity with an NTP v4 server 114
How to install your S100	114
How to get time using dial-up	114
How to get time using GPS	114
How to install your GPS antenna	115
How to acquire and install SymmTime™	115
Use the quick “How to” guide	115
How to change the root password	115
How to get information about NTP	116
Solutions	116

The S100 does not respond to ping command		116
The S100 does not respond to NTP queries		116
I cannot establish a serial connection with the S100 116
My S100 won’t track satellites	117

Appendix A
S100 Specifications	119
S100 Data Sheet Specifications	119
Pin Descriptions	120

S100 User Guide – Rev. D – June 2005

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Symmetricom manual Appendix a S100 Specifications 119

Contents

S100 User Guide S100 User Guide Rev. D June Table of Contents Chapter Web-Based Interface TCP/IP Chapter Operations & Time-Protocols Appendix a S100 Specifications 119 Appendix C Appendix E Antenna Replacement 141 Index 143 Introduction and Overview How to Go here for the answerChapter Term Definition Conventions Used Time Standards Product DetailsGlobal Positioning System GPS Time Synchronization and Business Stratum LevelsStratum Level Significance National Measurement Institutes How the S100 Solves the ProblemCountry Name of NMI Abbreviation Special Safety Instructions Sources of Time S100 TechnologyOverview S100 Product Overview Web-based Access How the S100 Works Time Distribution Model S100 and Time Distribution S100 and NTP v4’s Security FeaturesS100 and Client Software S100 and the Global Positioning System SyncServer S100 For the S100-Dial-up/ACTS For the S100-GPS Installation and ConfigurationGetting Up and Running Unpacking Your S100 For the S100-Dial-up/ACTS For the S100-GPS N c S e rv e r Your CD-ROM PuTTY Folder Details Using the Software PSFTP.EXE PUTTYGEN.EXE Rack Mounting Installing Your S100Primary Power Connection Important Safety Instructions Making All Connections An Overview On the S100 Front Panel Setting Up the Hardware Appendix E on On the S100 Rear Panel Choosing an Antenna Location Installing the GPS AntennaOutdoors Connecting the Rubidium Option Installing the GPS antennaEstablishing a Serial Connection 4Connecting the S100 5COM Port Properties Setting Up the IP Address 6Login and Command Line 9IPCONFIG and Ping Screen Testing Network Functionality Normal Turning Off Your S100 Logging On How to Acquire Time System Status Logged Administrator Log-In Next Step Configuration Wizard Choose Your Time Source Dial-up to NISTs Automated Computer Time Service Acts 17Configuring the S100 Time Source GPS Then click Next for the System Information dialog Test Results dialog System Tests Dialog Dialup Settings dialog Setup Complete dialog System Information dialog System Tests dialog Test Results dialog NTP 30System Information fields Click Test Now IRIG-B v.120,122,123 Configuring NTP Dialup Backup dialog 36System Testing options 37Test Results shown Installing SymmTime Using SymmTime SyncServer S100 To Synchronize SymmTime Next Use the Web-Based Interface SyncServer S100 Interface Screen Reference Web-Based Interface Logging Administrative Interface 2Administrative Interface Base Menu Admin Interface Base Menu 3Interface Admin Menu, expanded Administrative Menu Expanded System Status Timing Configuration NTP Relationships 5Configuring New Clients and Servers S100 User Guide Rev. D June NTP Dialup NTP Time Source Test NTP Status NTP Restart SyncServer S100 Advanced ntp.conf 10Viewing the NTP Configuration File 11Obtaining and Generating Keys Certificates Advanced Keys/Certificates Timing Engine Main Settings IRIG-A IRIG-B Timecode Settings GPS Health GPS InformationBit Position Meaning if bit value = 15GPS Signal Strength GPS Signal Strength GPS Position GPS Time Other Information Clock SettingsEngine Time 20Control Settings Control Settings Model Information Networking S100 User Guide Rev. D June Ping Ifconfig Output Options Traceroute Shutdown/Reboot Administration Restart Web Interface Admin Users Time Zone System Log Configuration Snmp Edit Snmp Configuration 33Setting Alarm Parameters Alarms NTP Log Logs System Log Boot Log Http Log Config Log Search Ntpd Manual HelpSyncServer Help Ntpd Help 40Log Off screen Logging Off SyncServer S100 S100 Operations and Time Protocols Sysplex TimerHow the S100 Uses the Sysplex Timer Operations & Time-Protocols 41Time Information String Parameters Daytime Protocol RFC Time Protocol RFC Network Time Protocol RFC Simple Network Time Protocol RFCNTP Data Format Version Number VN Leap Indicator LIMode Stratum Poll Precision Synchronizing Distance Root Distance Version ModeStratum Poll Interval Authentication NTP NTP Authentication Public Domain NTP Package Typical NTP Configuration ConsiderationsAuthentication NTP v4 Autokey How NTP Defines the Authentication Process Clients Other NTP Considerations Basic NTP Configuration S100 User Guide Rev. D June SyncServer S100 S100 User Guide Rev. D June 43Large Net NTP Configuration 44Large Net NTP Configuration 45Small Net NTP Configuration Peers Acts Interface Dial-upSecurity Acts Operation Snmp Simple Network Management Protocol Version 106 S100 User Guide Rev. D June Parameter Command Line Flag Snmp.conf token An authenticated and encrypted request example 108 S100 User Guide Rev. D June What are the main differences between Sntp and NTP clients? Frequently Asked QuestionsQuestions How can we obtain NTP client software to use with the S100? How do I check versions of the software in the S100? How does the S100 handle Leap Second? Cable length and Type Antenna How do I know if the satellite signal strength is good? What security functions are provided with the S100? Does the S100 support NTP v4?Can the S100 utilize a certificate from an external CA? How is the interface to the S100 secured? How-to’s and Tips How to get time using GPS How to install NTP v4 on a Unix systemHow to install your S100 How to get time using dial-up How to change the root password How to install your GPS antennaHow to acquire and install SymmTime Use the quick How to guide S100 does not respond to NTP queries SolutionsHow to get information about NTP S100 does not respond to ping command My S100 won’t track satellites Possible cause of tracking problems How to fix 118 S100 User Guide Rev. D June Component Specifics Description S100 SpecificationsS100 Data Sheet Specifications Appendix a Pin Descriptions Appendix B Time Glossary Cdma BCDCdsa Certificate Request Content FilteringCertificate Authority CA Certificate Extension DES DclsDhcp DTT DSASS/NTP DSS Http GMTGPS Html Irig IKEITU MIB LANLdap MD5 NTP NistNOC Ntms PKI OSIPCI Pkcs SHA-1 RSAMime TCP/IP SnmpSSL SSL-LDAP TPC TftpTLS TMC UDP/IP TSATSP TSR WAN UTCVPN W3C 509 v3 Certificate Extension Emea Assistance Center Customer AssistanceAppendix D US Assistance Center Emeasupport@symmetricom.com Conforms to the Following European Union Directives Declaration of ConformityAppendix C Symmetricom, Inc Westwind Blvd Santa Rosa, Ca USA FCC Appendix E Antenna Replacement 142 S100 User Guide Rev. D June Numerics Index 144 S100 User Guide Rev. D June S100 User Guide Rev. D June 145 Denial of Service DES S100 User Guide Rev. D June 147 Https Irig a 150 S100 User Guide Rev. D June S100 User Guide Rev. D June 151 152 S100 User Guide Rev. D June S100 User Guide Rev. D June 153 154 S100 User Guide Rev. D June S100 User Guide Rev. D June 155 Vault Verification Version Virus VPN W3C Wait time WAN 509 v3 Certificate Extension Coordinate Year 158 S100 User Guide Rev. D June