User ManualTable of ContentsTable of Contents3Chapter 19Introduction and Overview9Conventions Used10Product Details11Time Standards11Global Positioning System (GPS)11Stratum Levels12Time Synchronization and Business12How the S100 Solves the Problem13National Measurement Institutes13Special Safety Instructions14Lithium Battery Disposal Instructions14Electrical Safety Instructions14Chapter 215S100 Technology15Overview15S100 Product Overview15Sources of Time15On the Network15Web-based Access16Time Distribution Model17How the S100 Works17S100 and Time Distribution18S100 and Client Software18S100 and NTP v4’s Security Features18S100 and the Global Positioning System19Chapter 321Installation and Configuration21Overview21Getting Up and Running21Unpacking Your S10021Your CD-ROM23Using the Software24PuTTY Folder Details24PUTTY.EXE24PSCP.EXE24PSFTP.EXE25PLINK.EXE25PAGEANT.EXE25PUTTYGEN.EXE26Installing Your S10027Rack Mounting27Primary Power Connection27Important Safety Instructions!27Making All Connections: An Overview28Setting Up the Hardware29On the S100 Front Panel29On the S100 Rear Panel30Installing the GPS Antenna31Choosing an Antenna Location31Installing the GPS antenna32Connecting the Rubidium Option32Establishing A Serial Connection32Setting Up the IP Address34Testing Network Functionality36Turning Off Your S10037How to Acquire Time38Logging On38Administrator Log-In39Next Step40The Configuration Wizard40Choose Your Time Source41GPS43NTP50Configuring NTP53IRIG-B (v.120,122,123)53Using SymmTime™57Installing SymmTime57To Synchronize SymmTime:59Next: Use the Web-Based Interface59Chapter 461The Web-Based Interface61Overview61Interface: Screen Reference61Logging In62Administrative Interface62Admin Interface: Base Menu63Administrative Menu: Expanded64System Status65Timing Configuration65NTP Relationships66NTP Time Source Test68NTP Dialup68NTP Restart69NTP Status69Advanced: ntp.conf71Advanced: Keys/Certificates72Timing Engine73Main Settings73Timecode Settings74GPS Information75GPS Health75GPS Signal Strength76GPS Time77GPS Position77Other Information78Engine Time78Clock Settings78Control Settings79Model Information80Networking80TCP/IP80ifconfig Output82Ping82Traceroute83Administration84Shutdown/Reboot84Admin Users85Restart Web Interface85Time Zone86System Log Configuration86SNMP Configuration87SNMP Edit87Alarms88Configuration Wizard88Logs89NTP Log89Boot Log90System Log90Config Log91HTTP Log91Help92SyncServer Help92NTPD Help92Search NTPD Manual92Logging Off93Chapter 595Operations & Time-Protocols95S100: Operations and Time Protocols95Sysplex Timer95Time Protocol (RFC 868)97Daytime Protocol (RFC 867)97Simple Network Time Protocol (RFC 2030)98Network Time Protocol (RFC 1305)98NTP Authentication101Authentication: NTP v3101Authentication: NTP v4 Autokey102Public Domain NTP Package102Typical NTP Configuration Considerations102Other NTP Considerations103Clients103Basic NTP Configuration104Peers111Security111ACTS Interface: Dial-up111ACTS Operation112SNMP (Simple Network Management Protocol)112Version 1113Version 3114Chapter 6117Frequently Asked Questions117Questions117How can we obtain NTP client software to use with the S100?117What are the main differences between SNTP and NTP clients?117Is there a way to get GPS time instead of UTC time from the S100?117What outputs are available on the S100?117How does the S100 handle Leap Second?118What signal strengths are required by the S100 receiver to start tracking?118How do I check versions of the software in the S100?118What is the maximum number of computers that can be networked to the S100?118How many satellites are necessary for me to operate the S100?119How do I know if the satellite signal strength is good?119What is the maximum antenna cable length for use with the S100?119What are the available antenna cable lengths and antenna requirements?119What are some guidelines for correctly cutting the cable, using splitters, and using cable connectors?119How many NTP requests can be processed by the S100 each second?120Does the S100 support NTP v4?120Can the S100 utilize a certificate from an external CA?120How is the interface to the S100 secured?120What security functions are provided with the S100?120Does the S100 support any functions to restrict user access to NTP service? Can the S100 set up clients' IP address to be connected?120What is the bandwidth utilization (TCP/IP) each time an NTP client gets a time update from the NTP server?120Is NTP v4 compatible with Network Address Translation (NAT) gateways?121How does the S100 clock behave when a leap second is introduced?121How-to’s and Tips121How to install NTP v4 on a UNIX system122How to configure an NTP v4 client to connect to an NTP v4 server with the autokey scheme122How to verify NTP v4 autokey client connectivity with an NTP v4 server122How to install your S100122How to get time using dial-up122How to get time using GPS122How to install your GPS antenna123How to acquire and install SymmTime™123Use the quick “How to” guide123How to change the root password123How to get information about NTP124Solutions124The S100 does not respond to ping command124The S100 does not respond to NTP queries124I cannot establish a serial connection with the S100124My S100 won’t track satellites125Appendix A127S100 Specifications127S100 Data Sheet Specifications127Pin Descriptions128Appendix B129Time Glossary129Appendix D145Customer Assistance145US Assistance Center145Customer Service145Technical Support145EMEA Assistance Center145Customer Service146Technical Support146Appendix C147Declaration of Conformity147Appendix E149Antenna Replacement149Index151Size: 2.1 MBPages: 166Language: EnglishOpen manual