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S100 User Guide – Rev. D – June 2005

91

2

5

3

Leap Indicator (LI)

This is a two-bit code warning of an impending leap second that will be inserted or deleted in 
the last minute of the current day, with bit 0 and bit 1, respectively, coded as follows:

Figure 5-42:

Two-bit Leap Second Indicator Code

You are alerted to an alarm condition when the S100 is first powered on—in other words, 
before time is initially acquired from the timing signal. An alarm condition will also signal when 
the timing parameters are changed. This alarm condition will persist until the S100 acquires 
time. It should not signal again until the unit is powered off and on.

Version Number (VN)

This is a three-bit integer indicating the NTP version number. The S100 will return the version 
number from the incoming NTP message.

Table Intro-1:  

NTP Message Data 

LI

VN

MODE

Stratum

Poll

Precision

Synchronizing Distance (Root Distance) (32 bits)

Synchronizing Dispersion (Root Dispersion) (32 bits)

Reference Identifier (32 bits)

Reference Time Stamp (64 bits)

Originate Time Stamp (64 bits)

Receive Time Stamp (64 bits)

Transmit Time Stamp (64 bits)

Authenticator (Optional) (96 bits)

 0

 8

                      16

 24

    31

Содержание SyncServer S100

Страница 1: ...Chapter 1 S100 User Guide SyncServer S100 User Guide Installation Configuration and Operation for the SyncServer S100 OS Version 1 3 Part S100 User Guide Rev D June 2005 ...

Страница 2: ...2 S100 User Guide Rev D June 2005 1 ...

Страница 3: ...ecial Safety Instructions 6 Lithium Battery Disposal Instructions 6 Electrical Safety Instructions 6 Chapter 2 S100 Technology 7 Overview 7 S100 Product Overview 7 Sources of Time 7 On the Network 7 Web based Access 8 Time Distribution Model 9 How the S100 Works 9 S100 and Time Distribution 10 S100 and Client Software 10 S100 and NTP v4 s Security Features 10 S100 and the Global Positioning System...

Страница 4: ...Installing the GPS Antenna 23 Choosing an Antenna Location 23 Installing the GPS antenna 24 Connecting the Rubidium Option 24 Establishing A Serial Connection 24 Setting Up the IP Address 26 Testing Network Functionality 28 Turning Off Your S100 29 How to Acquire Time 30 Logging On 30 Administrator Log In 31 Next Step 32 The Configuration Wizard 32 Choose Your Time Source 33 GPS 35 NTP 42 Configur...

Страница 5: ...ain Settings 65 Timecode Settings 66 GPS Information 67 GPS Health 67 GPS Signal Strength 68 GPS Time 69 GPS Position 69 Other Information 70 Engine Time 70 Clock Settings 70 Control Settings 71 Model Information 72 Networking 72 TCP IP 72 ifconfig Output 74 Ping 74 Traceroute 75 Administration 76 Shutdown Reboot 76 Admin Users 77 Restart Web Interface 77 Time Zone 78 System Log Configuration 78 S...

Страница 6: ... Clients 95 Basic NTP Configuration 96 Peers 103 Security 103 ACTS Interface Dial up 103 ACTS Operation 104 SNMP Simple Network Management Protocol 104 Version 1 105 Version 3 106 Chapter 6 Frequently Asked Questions 109 Questions 109 How can we obtain NTP client software to use with the S100 109 What are the main differences between SNTP and NTP clients 109 Is there a way to get GPS time instead ...

Страница 7: ...idth 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 verif...

Страница 8: ...ppendix B Time Glossary 121 Appendix D Customer Assistance 137 US Assistance Center 137 Customer Service 137 Technical Support 137 EMEA Assistance Center 137 Customer Service 138 Technical Support 138 Appendix C Appendix E Antenna Replacement 141 Index 143 ...

Страница 9: ... configuration and operations The chapters and appendices address topics including Installation configuration and operation The User Interface How the S100 works FAQ and Solutions Here are shortcuts to those sections that answer frequently asked how to or How do I questions How to Go here for the answer Acquire time How to Acquire Time on page 30 Choose and configure your time source Choose Your T...

Страница 10: ...cifications on page 119 Set up all hardware connections Making All Connections An Overview on page 20 Synchronize SymmTime To Synchronize SymmTime on page 51 Test for NTP functionality Testing Network Functionality on page 28 Use the web based interface The Web Based Interface on page 53 Table 1 Type Conventions Term Definition Bold Boldface type is used for menu and command names field tab and bu...

Страница 11: ...he ideal source of time for Time The S100 uses UTC as its time standard Global Positioning System GPS The U S Department of Defense Global Positioning System GPS is a constellation of approximately 29 satellites that orbit Earth twice a day Their orbits are inclined 56 degrees to the equator The GPS satellites signals are used by a GPS receiver to precisely determine its own position and time The ...

Страница 12: ...rce the higher the possibility of time degradation because of variations in communication paths and the stability of the local clock The S100 can be a Stratum 1 device as well as Stratum 2 or 3 Time Synchronization and Business Reliable time synchronization is essential for doing business today Ensuring that all components of a network are synchronized to the global UTC time standard is critical f...

Страница 13: ...as maintained by the U S Naval Observatory one of the National Measurement Institutes NMIs in the U S Time is distributed using the Network Time Protocol NTP and between multiple sites The result is that with the S100 network users can get time from within your firewall Full specifications are found in S100 Specifications on page 119 National Measurement Institutes The S100 synchronizes to UTC Thi...

Страница 14: ... local codes Contact your local environmental control or dis posal agency for details Caution Do not install the modem phone cord during an electrical storm Note minimum 26AWG phone cord is recommended for added safety Note A minimum 26AWG phone cord is recommended for added safety Note POWER CORD SELECTION If your unit is not provided with a power cord set purchase only a Certi fied cord set suit...

Страница 15: ...work It acquires UTC Universal Coordinated Time from GPS signals or using ACTS dial up to the National Institute of Standards and Technology in the U S If there are several S100s on your network only a few S100s need acquire UTC directly They can then distribute that time to other S100s On the Network Clients on a network synchronize with a time source using NTP the Network Time Protocol to exchan...

Страница 16: ...d SNMP v3 Simple Network Management Protocol for easy integration into your existing management hierarchy Web based Access The S100 management is web based Using a standard browser you can set up and configure an S100 from any point on the Internet See Chapter 3 for more about this web access There is a detailed section about this web based interface in Chapter 4 The Web Based Interface on page 53...

Страница 17: ...r national time standards organizations The S100 acts as a Stratum 1 time server that derives its time from GPS and distributes this time over a TCP IP network using NTP Stratum 2 NTP clients can distribute time to Stratum 3 computers How the S100 Works The following describes how the S100 acquires and secures time Computer Systems NTP Clients SyncServers or Computer Systems NTP Clients Symmetrico...

Страница 18: ...e those clients with S100 s NTP server Obtain the SymmTime NTP client for Windows at http www ntp systems com symmtime asp Details about installing SymmTime are found in Installing SymmTime on page 49 Unix Linux clients can be synchronized using the public domain NTP daemon or equivalent NTP client software If an NTP daemon is not available for your system you can obtain a copy of RFC 1305 or 2030...

Страница 19: ... at http www ntp org http www ietf org rfc rfc1305 txt S100 and the Global Positioning System The Global Positioning System GPS receiver in the S100 tracks GPS satellites as they pass overhead and determines the range of the satellite in relation to its antenna The GPS receiver uses the following four properties of the satellite to determine its own position and derive the time x or latitude y or ...

Страница 20: ...12 S100 User Guide Rev D June 2005 1 SyncServer S100 ...

Страница 21: ...onal Install GPS antenna connect phone line 2 Using the serial cable establish the S100 s IP address 3 Test for network functionality ping 4 Using the web based interface choose and configure the time source Unpacking Your S100 Unpack and inspect each item in the box If there is any damage or any items are missing please contact Symmetricom Customer Assistance see Appendix D on page 137 Note The G...

Страница 22: ...S 232 Cable Six foot RS 232 Cable Phone cord Phone cord D BNC Signal Breakout Cable BC11576 1000 D BNC Signal Breakout Cable BC11576 1000 Bullet Antenna Antenna Mast aluminium mast threaded to screw into the bottom of antenna Mounting Bracket Hardware for attaching mast to railing 50 foot RG58 Belden 8240 or equivalent cable For the S100 Dial up ACTS For the S100 GPS ...

Страница 23: ... the time from an S100 unit or other NTP server When executed a small pop up containing four clocks appears Once installed visit http www ntp systems com symmtime asp for the latest file downloads A nten na C a b le C D w ith N T P C lien ts S ym m T im e U s er G u ide S yn cS erv er S 10 0 R S 2 3 2 C a b le A C P o w e r C ord P h o ne C o rd F o r G P S o p tio n B ullet A n te nn a A nte n na...

Страница 24: ... command line interface to PuTTY back end pscp exe SCP client using command line secure file copy psftp exe SFTP client for general file transfer session similar to FTP putty exe a Telnet and SSH client puttygen exe RSA key generation utility PUTTY EXE is a secure shell client utility that allows you to log into a multi user computer from another computer over the network The file Putty exe only r...

Страница 25: ...ly PSCP will also use this protocol if it can but there is an SSH 1 equivalent it can fall back to if it cannot PSFTP allows you to run an interactive file transfer session much like the Windows FTP program You can list the contents of directories browse around the file system issue multiple get and put commands and eventually log out PLINK EXE is a command line connection tool similar to UNIX SSH...

Страница 26: ... conventional password authentication you prove you are who you claim to be by knowing the correct password The only way to prove you know the password is to enter it If the server has been compromised an intruder could learn your password Public key authentication Puttygen exe solves this problem You generate a key pair consisting of a public key which everybody is allowed to know and a private k...

Страница 27: ...t the ambient temperature is no higher than 50 C 122 F Make sure the unit is properly balanced and grounded Primary Power Connection The S100 uses external AC power The unit has a power cable with a PH 386 IEC 320 C 13 three conductor female connector on the computer end of the cable The other end of the cable has a NEMA 6 15P grounding plug US Standard 15 amp 125 volt straight blade plug Importan...

Страница 28: ...n when you install the S100 You will need to make a network connection you may or may not require a hub to do this It is suggested you obtain an IP address from your IT department The Serial cord connects the S100 to your computer Connect the S100 to your network using the network port Use your verified IP address in your web browser to reach the S100 s Configuration Wizard online ...

Страница 29: ...ou are doing this so to configure the S100 using a PC see Establishing A Serial Connection on page 24 in the next section 2 Connect the RJ45 terminated Ethernet cable to one or both network ports on the S100 Note If only one network connection is required use the left Ethernet port eth0 The two USB ports are not functionable on this S100 release Sysplex Timer Port This port outputs UTC only Figure...

Страница 30: ... BC11576 1000 to the DB15 Connector shown in Figure 3 3 If you are using the S100 with an optional Rubidium oscillator connect the external rubidium cable furnished with the Rubidium oscillator from the DB9 Connector to the DB15 connector see Figure 3 3 Note The D BNC Signal Breakout Cable BC11576 1000 has five connectors on it The three connectors labelled Time Code Output Time Code Input and 1 P...

Страница 31: ... the bullet antenna is designed to prevent accumulation of rain snow or ice on its surface Note The bullet antenna described in this manual has been replaced as described in Appendix E on page 141 The GPS transmission is a 1 5 GHz L1Band spread spectrum signal Being spread spectrum means it is relatively immune to interference But high energy sources especially those with significant in band energ...

Страница 32: ...r green LED in the front panel comes on When the hard drive is active a red LED light comes on Connecting the Rubidium Option If you are using the optional Rubidium oscillator the external SS X72 cable needs to be attached for proper operation Facing the rear panel of the S100 connect the SS X72 cable from the DB15 connector to the DB9 connector forming a single loop If your unit has no DB9 connec...

Страница 33: ...your computer turned on 1 Use and configure Hyperterminal click Start Programs Accessories Communications HyperTerminal 2 The Connection Description dialog box appears In the Name field enter a name In this example it is S100 3 Click OK 4 In the Connect to dialog select the COM Port number you are connected to In this example COM Port 1 is selected 5 Click OK 6 In the COM1 Port Properties dialog e...

Страница 34: ...nter At the Password prompt type symmetricom Enter Note The following anomaly occurs when using Hyperterminal in WIN 95 boot e appears at the prompt interrupting the boot process Use your backspace key to delete the e Then press Enter This will continue the bootup process If using Tera Term or other terminal emulation program this anomaly may not occur For security purposes the root or superuser p...

Страница 35: ...s Enter Note Most users will use a static IP address Using the DHCP Dynamic Host Configura tion Protocol is an automatic way to obtain an IP address However this IP address may later be reassigned if it is not used for a period of time depending on your IT network guidelines 8 A command line appears Type reboot Enter The S100 reboots several Linux boot up screens appear A similar message should ap...

Страница 36: ...e command line in Step 1 At the command prompt See Figure 3 9 type a ping command to verify that the S100 is visible on the network Use the IP address for the S100 For example ping xxx xxx xxx xxx where xxx the IP address of the S100 2 Press Enter The message shown in Figure 3 9 indicates the ping command was successful Four packets were sent and none were lost An unsuccessful ping results in pack...

Страница 37: ...the IP address in the browser Address field and press Enter The Configuration Wizard link appears Use the Wizard to complete the S100 configuration process Turning Off Your S100 Normal If you have configured the unit correctly and it is running normally select Administrative Menu Administration Shutdown Reboot from the S100 s web interface The following screen appears Figure 3 11 S100 Shutdown Scr...

Страница 38: ...ess window enter the S100 IP address Enter On your first log in the first screen you see is the System Status screen The System Status screen gives you the status of the S100 s Timing Uptime and Versions The color of the box on the top left side of the screen is your guide It follows the traffic light convention Green Normal Operation The S100 is up and running with the correct time Amber Unsatisf...

Страница 39: ...u may log off by clicking Log Out at the top of each screen in the interface More about logging off can be found in Logging Off on page 85 System Status Logged In Once logged in you see the System Status screen again except now it has more information In Versions this information refers to the current software in the S100 In the NTP Host Reachability this example shows that the IP address was acce...

Страница 40: ... and press Enter The browser displays the screen in Figure 3 15 Figure 3 15 Configuration Wizard Choose Primary Time Source Note The Configuration Wizard is the most convenient way to configure the S100 The Configuration Wizard Using your browser follow this easy to direct sequence of dialogs to configure the S100 s source of time You will need the wizard only once unless you change the time sourc...

Страница 41: ...up to NIST s Automated Computer Time Service ACTS Network Time Protocol NTP IRIG B Figure 3 17 shows the screen flow after choosing the time source option you prefer Warning If you ve already configured your timing engine the Configuration Wizard will remove all of that configuration This may be considered desirable please be sure that this is what you want to do Figure 3 16 Choose Your Time Sourc...

Страница 42: ...s configuration screens used in the Wizard Most information is self explanatory Regardless of the time source chosen for configuration the Wizard uses a common set of screens and only the specific information relating to the time source chosen may be different on any particular screen Figure 3 17 Configuring the S100 Time Source ...

Страница 43: ...on dialog see Figure 3 20 If you check Use dialup as backup for GPS this Dialup Settings dialog is displayed In Options if you wish to use ATDP pulse dialing check the box otherwise the S100 uses standard ATDT dial tone dialing In the Modem Phone Number field enter the NIST phone number preceded by any prefixes that might be required to reach those numbers A 9 nine comma prefix gets an outside lin...

Страница 44: ... test is conducted this email address receives the notice Mail forwarder or the SMTP server Host name System S100 location Confirm the data that is in the fields If it is not accurate change it to the correct information Click Next Note All the fields are optional A unit can be configured and tested with all the fields blank Figure 3 20 System Information ...

Страница 45: ...eck them they all will be tested If you do not use dial up as backup it will not be listed here nor will it be tested Initiate the test by clicking Test Now Test Results dialog This displays the results of your test This tells you if the S100 s GPS receiver is functioning properly In this example it is However failed tests are also shown Figure 3 21 System Testing options Figure 3 22 Test Results ...

Страница 46: ... number if you designated dial up as the backup source for time Host name and System location Administrator e mail Dialup Settings dialog When using dial up the time reference is coming from an analog phone line through the built in modem Automated Computer Time System ACTS is maintained by NIST In the US use either of the following phone numbers to access time Colorado 303 494 4774 Hawaii 808 335...

Страница 47: ...log is displayed In the field enter or paste your modem phone number Then click Next for the System Information dialog System Information dialog This shows Admin e mail for the administrator of the S100 Admin Password Mail forwarder or the SMTP server Figure 3 24 Dial up Settings Figure 3 25 System Information fields ...

Страница 48: ...urate change it to the correct information Click Next System Tests dialog You can skip the test by clicking Finish or initiate the test by clicking Test Now The default is to test all the designated services so Dialup and E Mail unless you un check them will be tested To initiate the test click Test Now Figure 3 26 System Testing options ...

Страница 49: ...hown There is no output to the Mail test field That is because mail is tested by sending an e mail to the address that you indicated earlier Click Finish Setup Complete dialog This screen verifies your configuration of the S100 Its time source Modem phone number Host name System location Administrator e mail Figure 3 27 Test Results shown Figure 3 28 Your Dial up set up is complete ...

Страница 50: ... Choose the NTP radio button see Figure 3 16 and click Next The Network Time Protocol Settings dialog Figure 3 29 appears On this screen name one or more NTP servers or peers NTP v4 s Autokey requires digitally signed certificates For more about the Autokey protocol see S100 and NTP v4 s Security Features on page 10 Then click Next Figure 3 29 Defining Your NTP Settings ntp1 symmetricom com ...

Страница 51: ...rmation dialog shows you Admin e mail for the administrator of the S100 Mail forwarder or the SMTP server Host name System S100 location Confirm the data that is in the fields If it is not accurate change it to the correct information Click Next Figure 3 30 System Information fields ...

Страница 52: ... by clicking Test Now The default is to test all the services so NTP and E Mail unless you un check them will be tested Click Test Now Test Results dialog This screen tells you if the NTP time source for your S100 is functioning properly or if there is a test problem Figure 3 31 System Testing options Figure 3 32 Test Results shown ...

Страница 53: ...ge 58 Use the dialog to view the NTP status and create the NTP associations IRIG B v 120 122 123 Both the D BNC Signal Breakout Cable and the optional Rubidium oscillator cable provide a Timecode Input connector To use IRIG time code as a reference connect the IRIG signal to the Timecode Input connector select IRIG B see Figure 3 16 and click Next If you wish to use dial up as a backup time source...

Страница 54: ...ings dialog is displayed see Figure 3 24 In the field enter or paste in your modem phone number Then click Next A screen similar to Figure 3 35 now appears System Information dialog This shows Admin e mail for the administrator of the S100 Mail forwarder or the SMTP server Figure 3 34 Dial up Settings Figure 3 35 System Information fields ...

Страница 55: ...he correct information Click Next System Tests dialog You can skip the test by clicking Finish or initiate the test by clicking Test Now The default is to test all the services so unless you un check them they all will be tested If you do not use dial up as backup it will not be listed here nor will it be tested Figure 3 36 System Testing options ...

Страница 56: ... the Mail test field as no addresses had been provided in the System Information dialog Figure 3 35 Click Finish Setup Complete dialog This screen verifies your configuration of the S100 Its time source Modem phone number if you designated dial up as the backup source for time Host name System location Administrator e mail Figure 3 37 Test Results shown Figure 3 38 Your IRIG set up is complete ...

Страница 57: ...ng four clocks appears Once installed visit http www ntp systems com symmtime asp and download the latest updated files Installing SymmTime 1 On the client computer s hard drive create a separate directory for SymmTime 2 Copy the SymmTime200x exe file from the utility disk into this directory 3 Double click Symmtime exe This will install the program onto your computer 4 Configure the clocks as you...

Страница 58: ...lick the displayed clocks for the menu and select Sync Servers 6 The following screen appears Click Add Server 7 New Server dialog box enter the IP address and location of the S100 Click OK The IP address you use will be the one obtained in the setup of the S100 ...

Страница 59: ...cally get time from the S100 A similar screen will appear 2 Click Sync Now If you receive a no response it is because you have not yet configured the S100 configure it now An affirmative response confirms you have configured the S100 Next Use the Web Based Interface Now that you have established the S100 configured your time source and installed your client software you can use the web based inter...

Страница 60: ...52 S100 User Guide Rev D June 2005 SyncServer S100 ...

Страница 61: ...otocol use the NTPD Help link see NTPD Help on page 84 embedded in the S100 s web interface to review the NTP Distribution document source University of Delaware Additional information is available at http www ntp org Interface Screen Reference The S100 management interface has been designed with ease of use in mind As a result you access the management interface S100 through any web browser This ...

Страница 62: ...have logged in you will see the System Status screen see System Status on page 57 Log ins after this first log in will bring you to the last screen you accessed in your most recent session Administrative Interface This is the main tool for administering the S100 If you click Refresh at the top of any screen it will remove any confirmation or error messages on the screen If you click New Window at ...

Страница 63: ... Interface Base Menu The first thing you see on the left of your screen is the base Administrative Admin Menu This is the starting point for administration tasks on the S100 Click to expand the sub menu Figure 4 2 Administrative Interface Base Menu ...

Страница 64: ...ncServer S100 Administrative Menu Expanded Expanding each item on the base menu shows you all the available options Click Collapse at the bottom of the menu to revert to the base version of the menu Figure 4 3 Interface Admin Menu expanded ...

Страница 65: ...ention Green Normal Operation the S100 is up and running with the correct time Amber Unsatisfactory Some settings still need attention before secure time can be issued Red Unsatisfactory System not yet ready to issue time Timing Configuration These menu options let you manage NTP the heart of the S100 system For more details on each of the NTP terms used here see NTPD Help on page 84 Figure 4 4 Ch...

Страница 66: ...putting the S100 on These are all the devices from which the S100 can get time They are named as server or peer depending on their relationship to the S100 In this section clicking Reset clears any data you ve just added and clicking Remove and Restart NTP deletes the checked host s The Add New Relationships panel lets you add a host to your configuration Next to each parameter enter the values fo...

Страница 67: ...ouped for transmission in the following ways N A If you choose this option the Burst command will not be executed Burst Selecting this option tells the system that when the server is reachable send eight packets instead of one iBurst Selecting this option tells the system that when the server is not reachable send eight packets and keep trying every 16 seconds Minimum Poll Interval Indicate in sec...

Страница 68: ...s panel see NTP Relationships on page 58 Host All 127 127 40 0 onboard GPS IRIG reference clock driver 127 127 18 3 NIST ACTS reference clock driver localhost Options Use the checkbox to enable Verbose Output NTP Dialup In the following dialog enter or paste in your modem phone number Then click Submit Figure 4 6 Testing the NTP Time Source Figure 4 7 NTP Dialup ...

Страница 69: ...Reference Time This is the last time it synced System Peer This tells you which NTP server the S100 is synced to System Peer Mode This tells you what the S100 is client or otherwise to the NTP server it is synced to Warning It can take NTP a significant period of time to go through its processes If you choose to restart you will be required to reset your time source Figure 4 8 Restart NTP Figure 4...

Страница 70: ...yte code indicating the reference source If the reference source is stratum 0 this string will identify the type of source GPS or dial up for example If the source is stratum 1 or higher this 4 byte code will contain the IP address of the reference source Reference Time The local time at which the local clock was last set or corrected in a 64 bit time stamp format System Flags These are various fl...

Страница 71: ...xt file If you need help with the NTP config file click the NTP Configuration Help link near the top of the screen and you will be directed to NTP Help Additional information about NTP is available is available at www ntp org Warning If you improperly configure the ntp conf you will render the S100 unable to sync to any time source Be certain you know NTP well enough to do this Figure 4 10 Viewing...

Страница 72: ...eys Select this checkbox to generate random MD5 keys Then click Generate The screen refreshes and a keys generated message displays in the upper left corner Next to the Certificate Request field click Request to issue a certificate request A confirmation dialog will prompt you to tell the system where you want the certificate respond to the prompt If you choose Upload Certificate browse to the cer...

Страница 73: ...curity Features on page 10 Timing Engine This section of the interface lets you view various aspects of the Symmetricom bc635 637 PCI board the timing engine of the S100 Main Settings The timing engine mode choices you see in the drop down list box are GPS is the default which obtains the time from GPS receiver and antenna IRIG which obtains the time from the IRIG time code input Note IRIG time co...

Страница 74: ...es range from 9999999 to 9999999 Current Leap Seconds This figure accounts for the local offset Scheduled Leap Event Time This is a 32 bit binary value corresponding to the number of seconds elapsed since 0 hour January 1 1970 UTC Scheduled Leap Event Flag This will alert you to an upcoming leap event GPS Time Format UTC is the default IEEE Daylight Savings Flag This alerts you to an upcoming Dayl...

Страница 75: ...it implements changes you have made GPS Information This section of the admin menu appears only if you have the GPS option on the S100 The following items give details on GPS activity GPS Health This screen updates the signal status This example shows a normal screen The error codes are encoded into individual bits within the byte The bit positions and their meanings are shown below Bit Position M...

Страница 76: ...ortant for sensors with separate antennas 3 This bit is 1 if the last computed reference frequency error indicated that the reference oscillator is out of tolerance Packet 2D requests the oscillator offset and packet 4D returns the oscillator offset to the user 4 this bit is always set as the GPS receiver battery backup is not installed GPS Signal Strength Here the signal strength are displayed Th...

Страница 77: ...UTC Offset Currently this is 13 seconds GPS Position This screen shows you the calculated coordinates of the gps antenna X Coordinate Latitude Y Coordinate Longitude Z Coordinate Altitude Time of fix Time For more about GPS position see Chapter 2 S100 and the Global Positioning System on page 11 Note The GPS antenna described in this manual has been replaced as described in Appendix E on page 141 ...

Страница 78: ...quency on the oscillator The value here shows a rate match between the hardware clock frequency and the selected time reference source Jam Control Jam refers to jam synchronization This controls whether or not the software may jam the clock circuitry if a phase discontinuity of greater than 1 millisecond is found Battery Status The timing engine s battery status is noted here Clock Value This regi...

Страница 79: ... Control Settings The timing engine control settings are viewable here They are HeartBeat Mode The heartbeat is the specified frequency HeartBeat Counter1 and 2 These are internal counters to the timing engine Frequency Output The available frequencies are 1 5 and 10 MHz Event Control This setting enables or disables the ability of the internal clock to capture the time at which an external event ...

Страница 80: ... Model Information Networking Use the following dialogs to configure several parameters of the S100 on your network TCP IP The following dialog enables you to define the following parameters Network Interface Here choose the Ethernet port you are using If there is only one interface use eth0 the default A local loopback refers to a loopback plug inserted in one Figure 4 22 Configuring TCP IP ...

Страница 81: ... Local Domain This is your local domain name Search Domains The system will search these domains which usually include your local domain as well as others so it can resolve any unresolved host names that may be missing the host local or top level portion of the name Hostname Enter the S100 s name here IP Forwarding You can redirect data from one IP address to another by selecting Enable here DNS N...

Страница 82: ...shoot network problems Ping Use the ping command to test the network route between the S100 and a remote host This is a diagnostic tool that confirms that all is well between the two devices The dialog shown in Figure 4 24 lets you define the following parameters Host URL of the remote host Figure 4 23 Configuration Information Figure 4 24 Pinging the Remote Host ...

Страница 83: ...spond Traceroute Traceroute shows you the network route between the S100 and a remote host Use it as a diagnostic tool The dialog shown in Figure 4 25 lets you determine the following parameters Host Remote server s IP address Source Network Interface The S100 has two Ethernet cards 0 zero left and 1 right The default is eth0 as you see here Response Wait Timeout This is how long the S100 should w...

Страница 84: ...Using a 24 hour clock enter the time here Options These are Cancel Pending Shutdown Lets you cancel a shutdown Reboot The default setting Useful if you need to shut down and restart the hardware and software This is very handy if the S100 is remote File System Check on Reboot Here the system checks for errors lost clusters and other problems Message Here enter a message that would be sent only to ...

Страница 85: ...og to change delete or add a user Restart Web Interface This page lets you do a clean restart of the web server The restart affects only the management of the system not the time or service WARNING If you click Restart you will shut down the webserver then it will restart This will take a minute or two to complete Figure 4 27 Changing or Adding Users Figure 4 28 Server Restart option ...

Страница 86: ...r display purposes only It will not affect NTP the output or clients Highlight the time zone you want then click Submit to set the time zone System Log Configuration Use this option to configure the System Log Note Remote logging is available by specifying an IP address preceded by an sign Figure 4 29 Setting the Time Zone Figure 4 30 System Log Configuration ...

Страница 87: ...pulated with text this screen is a summary of the SNMP configuration commands entered in the SNMP Edit screen SNMP Edit Use this screen to enter your SNMP commands for configuration and any other related information Figure 4 31 SNMP Configuration Figure 4 32 SNMP Edit ...

Страница 88: ...here for this alarm it will tell you that the system has lost contact with its source of time but will keep going for some period If there has been a Configuration Change you can check here for an alarm to be sent Reset lets you clear the entered data and Submit tells the system you are finished Configuration Wizard The next item on the Admin menu is the Configuration Wizard This helps you select ...

Страница 89: ...th the drop down box Filter No filter Displays all logs Display only the last __ lines Useful for avoiding screen clutter Search Search feature allows you to see what has happened on any given day Selecting the case blind option lets the search ignore case in your search Selecting the line numbers option limits the search to log line numbers Choosing regular expression allows for pattern matching ...

Страница 90: ... User Guide Rev D June 2005 SyncServer S100 Boot Log Use this log to see messages created during the boot process System Log Use this log to monitor system activity Figure 4 35 Boot Log Figure 4 36 System Log ...

Страница 91: ...S100 User Guide Rev D June 2005 83 2 5 3 Config Log This log shows you S100 configuration and status messages HTTP Log This log shows webserver messages Figure 4 37 Config Log Figure 4 38 HTTP Log ...

Страница 92: ... NTP Network Time Protocol use the NTPD Help link see NTPD Help on page 84 embedded in the S100 s web interface to review the NTP Distribution document source University of Delaware Additional information is available at http www ntp org Search NTPD Manual This option gives you the ability to do basic searches within the NTPD Help Collapse Button Click the Collapse button at the bottom right of th...

Страница 93: ...interface You will see the System Status screen with some prompts At this point you can choose among the following options Log back in Go to the Configuration Wizard which will require you to log back in but will then take you directly to the wizard Continue the logoff by closing your browser Figure 4 40 Log Off screen ...

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Страница 95: ...pplies an ASCII broadcast of UTC time that is often used by computers that cannot or do not use NTP Note The GPS antenna described in this manual has been replaced as described in Appendix E on page 141 Be sure your computer is set up with the correct Serial Port parameters the correct baud rate data bits stop bits and parity The Serial Port will start broadcasting the time only after it receives ...

Страница 96: ... to change this file Set the value of the SYSPLEX_PROGRAM environment variable by adding or removing the comment character in the first column For example which sysplex program shall we run SYSPLEX_PROGRAM sysplex SYSPLEX_PROGRAM sysplexoddp SYSPLEX_PROGRAM sysplexnof SYSPLEX_PROGRAM sysplexoddpnof SYSPLEX_OPTIONS on will run the standard 9600 8 n 1 version of the protocol while which sysplex prog...

Страница 97: ...a site independent machine readable date and time The time service on the S100 responds to the originating source with the time in seconds since midnight of January 1 1900 The time is the number of seconds since 00 00 midnight January 1 1900 GMT So the time 1 is 12 00 01 A M on January 1 1900 GMT This base will serve until the year 2036 If the server is unable to determine the time it either refus...

Страница 98: ...ional information see http www faqs org rfcs rfc2030 html Network Time Protocol RFC 1305 The Network Time Protocol NTP is used to synchronize computer clocks in a TCP IP computer network It provides a comprehensive mechanism for accessing national time and frequency distribution services for organizing the time synchronization subnet and for adjusting the local clocks NTP provides accuracy of 1 10...

Страница 99: ...nal when the timing parameters are changed This alarm condition will persist until the S100 acquires time It should not signal again until the unit is powered off and on Version Number VN This is a three bit integer indicating the NTP version number The S100 will return the version number from the incoming NTP message Table Intro 1 NTP Message Data LI VN MODE Stratum Poll Precision Synchronizing D...

Страница 100: ...his is a 32 bit fixed point number indicating the estimated round trip delay to the primary synchronizing source in seconds with fraction point between bits 15 and 16 Set to zero in the S100 for GPS mode and a corresponding value when operating with another time source Synchronizing Dispersion Root Dispersion Version 3 Synchronizing Dispersion is a 32 bit fixed point number indicating the estimate...

Страница 101: ...information about this mechanism Autokey This field contains various autokey parameter requests and responses if autokey is enabled for the association These parameters can include signatures certificates or other data NTP Authentication NTP authentication enables an NTP client to ensure two things that the time stamp received has come from a trusted source and that it has not been modified in tra...

Страница 102: ...ired for private random keys Public Domain NTP Package For clients not using the public domain NTP package the NTP packet is enlarged by 8 bytes to handle the entire cryptochecksum which is 16 bytes 128 bits in size as generated by the MD5 Since this field is the last in the packet it should not present any difficulty How NTP Defines the Authentication Process If authentication is enabled and a va...

Страница 103: ... synchronization source if it meets a minimum accuracy level even if there are other more accurate servers However if a preferred server is far outside of the accuracy bounds determined by consulting other servers it will be discarded In general a server will not fall outside these accuracy bounds unless it or the majority of other servers are misconfigured Using preferred servers allows setting u...

Страница 104: ...ers from a lower stratum number and one unrelated peer from the same stratum The goals of an NTP architect are two fold to limit NTP s network activity and increase the accuracy of the clocks To achieve high clock accuracy the network latency needs to be low NTP can achieve a high level of accuracy and remain a good network citizen if local NTP servers are used and NTP servers use the appropriate ...

Страница 105: ...lowing access restriction can be used The restrict command is often used with the default keyword which limits the specified access from all IP addresses restrict address mask numeric_mask flag restrict 192 xxx x x ignore restrict default ignore Any restrict statements that do not contain a keyword will enable rather than restrict access Additional keywords such as noquery are also useful Noquery ...

Страница 106: ...the NTP service In addition the servers should use the access control and authentication facilities in NTP to further restrict access to the service If possible only authenticated NTP packets should be accepted The server should also only accept packets from known approved sources For additional security the NTP packets could be tunneled between the NTP sources and their external servers over encr...

Страница 107: ...ng resources When planning your network keep in mind a few generic don ts in particular Don t synchronize a local time server to another peer at the same stratum unless the latter is receiving time from lower stratum sources the former doesn t talk to directly This minimizes the occurrence of common points of failure but does not eliminate them in cases where the usual chain of associations to the...

Страница 108: ...100 S100 User Guide Rev D June 2005 SyncServer S100 Figure 5 43 Large Net NTP Configuration ...

Страница 109: ...S100 User Guide Rev D June 2005 101 2 5 3 Figure 5 44 Large Net NTP Configuration 2 ...

Страница 110: ...102 S100 User Guide Rev D June 2005 SyncServer S100 Figure 5 45 Small Net NTP Configuration Figure 5 46 Small Net NTP Configuration ...

Страница 111: ...s The term symmetric means that the keys must be the same on both the client and the server Because NTP keys are stored outside of the ntp conf file the NTP keys file must be specified in the ntp conf file for any configuration that will use keys This is accomplished using the keys keyword followed by the absolute path to the file With NTP version 3 authentication keys must be manually distributed...

Страница 112: ...he S100 supports MIB 2 The Simple Network Management Protocol SNMP is an application layer protocol that facilitates the exchange of management information between network devices It is part of the Transmission Control Protocol Internet Protocol TCP IP protocol suite SNMP enables network administrators to manage network performance find and solve network problems and plan for network growth Three ...

Страница 113: ... monitors using information from the network There are three catagories Statistics Current Status and Alerts Statistics Traffic CPU process are gathered and stored Current Status data is monitored i e links Alerts are reports of any unusual activity in the network There are two types of managed objects single objects and multiple related objects An example of a single object is atInput which is an...

Страница 114: ...message generated by an authorized entity Disclosure results when an unauthorized entity extracts values stored in managed objects or learns of notifiable events by monitoring exchanges between managers and agents SNMP does not implement authentication many vendors do not implement Set operations thereby reducing SNMP to a monitoring facility Note The S100 does not support SNMP Version 2 Version 3...

Страница 115: ...t up should be more restricted than that and require at least a level of authNoPriv when you configure the VACM access control Setting up your snmp conf file to look like this makes your commands much simpler defContext none defSecurityName MD5User defAuthPassphrase The UCD Demo Password defVersion 3 defAuthType MD5 defSecurityLevel authNoPriv COMMAND snmpget test net snmp org sysUpTime 0 RESPONSE...

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Страница 117: ...achine on which it is installed NTP Network Time Protocol is based on RFCs 1305 and 1119 and can be configured to obtain and distribute the time on the network It has a built in algorithm that calculates the time accurately up to 1 10 milliseconds The algorithm can be configured to obtain time from an alternate source in case the original time server fails or gets out of synchronization Is there a...

Страница 118: ... do the same to an IEEE 1344 IRIG B signal However in the event of a leap second if the time source is regular IRIG B dial up 1PPS or Freerun including ACTS you must pre program the leap second event with the command leap so that the S100 can be notified and maintain time correctly What signal strengths are required by the S100 receiver to start tracking The S100 requires four satellite signals wi...

Страница 119: ...le antenna cable lengths and antenna requirements Use the following table Note The bullet antenna cable described in this manual has been replaced as described in Appendix E on page 141 What are some guidelines for correctly cutting the cable using splitters and using cable connectors Some critical do s and don ts are Do use pre made kits from Symmetricom Do install the antenna where there are no ...

Страница 120: ...ecured The S100 supports a https SSL interface for remote client management What security functions are provided with the S100 NTP v3 crypto check sum NTP v4 Autokey Https SSL v3 web based user interface SSH SSL v3 remote login secure terminal interface Does the S100 support any functions to restrict user access to NTP service Can the S100 set up clients IP address to be connected The S100 can be ...

Страница 121: ... client and server This issue is addressed in the IETF draft doc Public key Cryptography for the Network Time Protocol Version 2 at http www eecis udel edu mills database rfc draft ietf stime ntpauth 04 txt Specifically there are some scenarios where the use of endpoint IP addresses may be difficult or impossible These include configurations where network address translation NAT devices are in use...

Страница 122: ... server line using vi server ipaddress autokey 2 Run ntpd and verify proper operation How to verify NTP v4 autokey client connectivity with an NTP v4 server To confirm that a secure NTP v4 session with autokey has been established with a server do one of the following 1 ntpdc command showpeer server ip and look for the auth flag 2 ntpq command associations and look for auth category ok 3 Run ntpd ...

Страница 123: ...HyperTerminal or Tera Term included on the enclosed CD on the serial port or SecureShell using PuTTY included on the enclosed CD Log in as User root with Password symmetricom 2 Type the command passwd all lower case UNIX commands are always case sensitive 3 You will be prompted to type your new password and then to type it again to confirm This is what you will see root syncserv1 root passwd New U...

Страница 124: ...Customer Assistance see Appendix D on page 137 The S100 does not respond to ping command Use the S100 web interface to ping your client see Ping on page 74 If your client cannot be reached with the ping command the S100 provides a traceroute utility to show the path data is taking Also check the Ethernet 10 100baseT cable connections between the RJ45 connector and the hub or network The S100 does ...

Страница 125: ... How to fix Antenna not positioned correctly Be sure antenna is on the roof or location with at least a 30 degree view above the horizon and at least two meters above other active receiving antennas and shielded from transmitting antennas Cable is cut to the wrong length causing dB gain problems Replace with cable of correct length Incorrect connector s at the end s of the cable s or along the cab...

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Страница 127: ... v3 TCP IP MD5 Authentication NTP SNMP v1 RFC 1157 DHCP RFC 2131 SSH Secure Shell HTTP HTML HTTPS RFC 2616 Serial Connection Serial Port RS 232 DB9 DTE Software Time Utility MS Windows SymmTime www ntp systems com symmtime asp Timing Accuracy Network 1 10 milliseconds typical GPS 1 microsecond relative to UTC GPS tracking Dial up service 1 10 milliseconds on sync Oscillator Rate stability 5 x 10 7...

Страница 128: ...n Phone Jack Mfr AMP Part 555153 1 Pin Number Description 1 TX 2 TX 3 RX 4 N C 5 N C 6 RX 7 N C 8 N C P3 Serial A Data Terminal Port DTE Description 9 pin D Plug Mfr AMP Part 869436 Pin Number Description 1 RS 232 Data Carrier Detect in 2 RS 232 Receive Data in 3 RS 232 Transmit Data out 4 RS 232 Data Terminal Ready out 5 Ground 6 RS 232 Data Set Ready in 7 RS 232 Request to Send out 8 RS 232 Clea...

Страница 129: ... approving US standards in many categories including computers and communications Standards approved by this organization are often called ANSI standards Antiwarrant Attribute certificate that has the same expire date as its valid date in other words it was never valid This is still sent at times because it contains other information that the system needs See also Warrant API Application Program I...

Страница 130: ... user the user may be allowed different types of access or activity BCD Binary Coded Decimal Also called packed decimal this is the representation of a number using 0s and 1s or four bit binary numbers So the number 29 would be encoded as 0010 1001 Bureau International de l Heure BIPM The worldwide organization that coordinates standard frequencies and time signals the BIPM maintains Coordinated U...

Страница 131: ...eir key Confidentiality Keeping secret data from unauthorized eyes Content Filtering A filter that screens out data by checking for example URLs or key words Coordinated Universal Time UTC The international time standard is called Coordinated Universal Time or more commonly UTC for Universal Time Coordinated This standard has been in effect since being decided upon in 1972 by worldwide representat...

Страница 132: ... IP addresses DHCP runs between individual computers and a DHCP server to allocate and assign IP addresses to the computers as well as limit the time for which the computer can use the address Diffie Hellman A key agreement algorithm used to create a random number that can be used as a key over an insecure channel Digital Certificates Digital Certificates are issued by a Certificate Authority CA w...

Страница 133: ...dard DSS DTT Symmetricom Temporal Token Element Manager ENMTMS Software that manages the components of an application Encryption The transformation of clear data clear text into unintelligible data ciphertext Asymmetric encryption also known as Public Key encryption allows for the trading of information without having to share the key used to encrypt the information Information is encrypted using ...

Страница 134: ... you were to try to match the original data HTML HyperText Markup Language the computer language used to create pages for the World Wide Web HTTP HyperText Transfer or Transport Protocol the protocol most often used to transfer information from World Wide Web servers to users of the Web HTTPS HTTP over an SSL connection Identity Certificate Also called Digital Certificates The hash creates a messa...

Страница 135: ...n the IP layer IRIG InteRange Instrumentation Group is an analog standard for serial time formats Irrefutable See Non repudiation ITU International Telecommunications Union the international organization that sets standards for data communication Key An alphanumeric string that encrypts and decrypts data Key Escrow A secure storage maintained by a trusted third party which holds keys Key Generatio...

Страница 136: ... LANs are not subject to public telecommunications regulations LDAP The Lightweight Directory Access Protocol is the standard Internet protocol for accessing directory servers over a network Leap Seconds Today s scientists and engineers have perfected clocks based on a resonance in Cesium atoms to an accuracy of better than one part in 10 trillion These clocks keep pace with each other to within o...

Страница 137: ...ional Measurement Institute Server NOC A Network Operations Center is a centralized point of network management within a large scale data network Non repudiation The time stamp creates an evidentiary trail to a reliable time source that prevents a party in a transaction from later denying when the transaction took place Notarization Certification of the identity of the party in a transaction based...

Страница 138: ...tographic products PKI Public Key Infrastructure The PKI includes the Certificate Authority CA key directory and management Other components such as key recovery and registration may be included The result is a form of cryptography in which each user has a Public Key and a Private Key Messages are sent encrypted with the receiver s public key the receiver decrypts them using the private key PKI Ce...

Страница 139: ... Authority CA whose certificate is self signed that is the issuer and the subject are the same A root CA is at the top of a hierarchy Root Time Trust Authority RTTA Also called Root Time Trust Services these are end user organizations who provide time calibration and auditing services Examples include Seiko Instruments Inc and Sovereign Time RSA The RSA Rivest Shamir Andleman algorithm is a public...

Страница 140: ...y time source such as a national atomic clock Stratum 1 servers source their time from a Stratum 0 device Stratum 2 and beyond obtain their time from Stratum 1 servers The further removed in stratum layers a network is from a primary source the greater the chance of signal degradations due to variations in communications lines and other factors Sysplex Timer The Sysplex Timer provides a synchroniz...

Страница 141: ...he time the message digest the message imprint hash and it is signed to verify the accuracy of that time In detail it is a signed data object where the encapsulated content is a TSTInfoObject thus it verifies the stamp as coming from the device you submitted it to and it is bound to the file you are working with Time Stamping Authority An authorized device that issues time stamps and its owner TLS...

Страница 142: ...erver or NMI Server is a standalone secure server based on the Master Clock which is dedicated to the creation of trusted UTC time at the NMI Time StampServer TSS Symmetricom s Time StampServer TSS services time stamp requests from applications transactions or computer logs Time Master Clock TMC Symmetricom s Master Clock is a Rubidium based master clock synchronized to UTC time and certified by a...

Страница 143: ...twork that provides data communications to a larger number of independent users than are usually served by a local area network LAN and is usually spread over a larger geographic area than that of a LAN Note 1 WANs may include physical networks such as Integrated Services Digital Networks ISDNs X 25 networks and T1 networks Note 2 A metropolitan area network MAN is a WAN that serves all the users ...

Страница 144: ...136 S100 User Guide Rev D June 2005 SyncServer S100 X 509 v3 Certificate Extension The X 509 standard with extended features approved by the IETF ...

Страница 145: ...re accepted as well as Purchase Orders from established customers US Assistance Center For the United States Canada Latin America Caribbean and the Pacific Rim including Asia Australia and New Zealand call Tel 1 888 367 7966 1 888 FOR SYMM or 1 408 428 7907 Worldwide Customer Service For product quotes service quotes installations order status and scheduling 7 00 am to 5 00 pm Pacific Time Monday ...

Страница 146: ... and scheduling 8 00 am to 5 00 pm Greenwhich Mean Time Monday through Friday excluding UK Holidays Technical Support For technical support 24 hours a day 7 days a week every day of the year contact us at emea_support symmetricom com Comments complaints and suggestions are always gladly accepted customer_relations symmetricom com ...

Страница 147: ...1 EEC 93 68 EEC 98 13 EC EN55022 1998 EMC Emissions for ITE Class A EN55024 1998 EMC Immunity for ITE Class A EN61000 3 2 1995 Harmonic Current Emissions as amended by A1 1998 A2 1998 EN61000 3 3 1995 Voltage Fluctuation and Flicker Immunity as amended by A1 1998 Note The Model XLi is compliant with the supplied standard antenna Initial Certification Issued 01 August 2003 Certification Updated 13 ...

Страница 148: ...installation If this device does cause harmful interference to radio or television reception the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the computer and receiver Connect the computer into an outlet on a circuit different from that to which the receiver is connected Con...

Страница 149: ...vers that have a non BNC antenna connector The Antenna Kit can be ordered with optional cable lengths and accessories Please note the following when setting up longer cable runs Using Belden 9104 the maximum cable length without amplification is 150 feet Using Belden 9104 the maximum cable length using the optional in line amplifier is 300 feet For cable runs longer than 300 feet an optional GPS D...

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Страница 151: ...rface 54 Base Menu 55 Expanded menu 56 Administration 76 Admin Users 77 Logs 81 Restart Web Interface 77 Shutdown Reboot 76 Time Zones 78 79 Administrator Log In 31 Advanced Keys Certificates 64 ntp conf 63 Advanced Encryption Standard AES 121 Alarms 80 Algorithm 121 Allow Broadcast Address 75 AM 66 ANSI 121 Antenna Cable length 23 Antenna Replacement Kit 141 Antiwarrant 121 API 121 ASCII 121 ATM ...

Страница 152: ... bc635 637 PCI board 65 72 BCD 122 BIPM 3 Boot Log 82 Broadcast client role 59 Broadcast role 59 Broadcastdelay 62 Bureau International de l Heure BIPM 122 Burst 59 C Calibration 122 Cancel Pending Shutdown 76 Case blind 81 CDMA 122 CDSA 122 Certificate 122 Certificate Authority 11 Certificate Authority CA 123 Certificate Extension 123 Certificate Request 11 64 112 Certificate Request Message 123 ...

Страница 153: ...trol Settings 71 Coordinated Universal Time UTC 123 Credential s 123 CRM 123 Cross Certificate 123 Cryptochecksum 93 Cryptography 123 Current Leap Seconds 66 Customer Assistance 137 Customer Service 137 138 D DAC Value 70 Data Encryption Standard DES 124 Daylight Savings Time 66 Daytime Protocol RFC 867 89 D BNC Signal Breakout Cable 22 45 D BNC Signal Breakout Cable BC11576 1000 14 DC 66 DCLS 124...

Страница 154: ...orithm DSA 125 Digital Signature Standard DSS 125 Digital time stamp 125 Directory 125 Disc Control 71 Disc Gain 71 Disciplining control 71 Display only the last __ lines 81 Disposal Instructions 6 DNS Nameservers 73 DSA 125 DSS 125 DTT 125 Dynamic Host Configuration Protocol 73 E Electrical Safety Instructions 6 Element Manager ENMTMS 125 E mail Address 80 EMEA Assistance Center 137 Encryption 59...

Страница 155: ...put 71 Functionality network 28 G Generate Keys 64 Generator Time Offset 67 Global Positioning System GPS 3 65 126 Antenna installation 23 Lost time signal 10 Glossary 121 GMT 126 GPS Health 67 GPS Position 69 GPS Receiver 119 GPS Signal Strength 68 GPS Time 69 GPS Time Format 66 GPS Week 11 GPS Week Number 69 GPS UTC Offset 69 H Hack crack 126 Hardware setup 21 23 Hash 126 HeartBeat 71 Heartbeat ...

Страница 156: ...115 Install your SyncServer 114 Log on to the interface 30 See how SyncServer works 9 Set the IP address 26 Verify NTP v4 autokey client connectivity 114 How tos and Tips 113 HTML 126 HTTP 126 HTTPS 126 HyperTerminal 25 I iBurst 59 Identity Certificate 126 IEEE 126 IEEE 1344 66 IEEE Daylight Savings Flag 66 IETF 3 4 126 IKE 127 Important Safety Instructions 19 In band Authentication 127 installati...

Страница 157: ...ynchronization 70 Jitter 62 K Kalman filter 71 Key 59 127 Key Escrow 127 Key Generation 127 Key Management 127 Key Pair 127 Key Recovery 127 L L1 Band L2 Band 128 LAN 128 LDAP 128 Leap Second 10 Leap Indicator 62 Leap Seconds 128 Line numbers 81 Lithium Battery Disposal Instructions 6 Local area network 128 Local clock phase shifting 71 Local Domain 73 Local Offset 66 Log Out 31 85 ...

Страница 158: ...oll Interval 59 Mode 66 Model Info 72 Modem phone number 35 39 46 Modulation Type 66 MTBF 128 Multicast client role 59 Multiplexing 129 N NASA 36 66 National Institute of Standards and Technology NIST 103 National Measurement Institute 5 129 National Measurement Institutes 5 Network configuration 58 Network Interface 72 119 Network Time Management System NTMS 129 Network Time Protocol RFC 1305 and...

Страница 159: ...mp 93 Poll Interval 92 Receive Time stamp 93 Reference Clock Identifier 92 Reference Timestamp 92 Stratum 92 Synchronizing Dispersion 92 Synchronizing Distance 92 Transmit Time stamp 93 Version 91 NTP Dialup 60 NTP Keys Certificates dialog 64 NTP Log 81 NTP Server Test dialog 60 NTP Start Stop 61 NTP Status 61 NTP Test 60 NTPD Help 53 84 NTPv3 93 NTPv4 7 10 94 O OCSP 129 OID 129 One Pulse Per Seco...

Страница 160: ...30 Peer role 58 Phase Control 71 Pin Descriptions 120 Ping count 75 PKCS 130 PKI 130 PKI Certificate 130 PKIX 130 Power Connection 19 Precision 62 92 Prefer 59 Private Key 130 Product Overview 7 product quotes 137 Propagation Delay 66 Prune 81 PSTN 130 Public Domain xNTP Package 94 Public Key 130 Public Key Certificate 131 Q Quiet 75 quotes 137 R RA 131 Rack Mounting 19 Real Time Clock 66 Reboot 7...

Страница 161: ...19 10 RFC 1305 4 90 Rising edge 71 Risk Management 131 Role 58 Root CA 131 Root delay 62 Root Dispersion 62 Root Dispersion Version 3 92 Root Distance 62 Root Distance Version 3 92 Root Trust Time Services RTTS 131 Route 75 RSA 131 RTC 66 S S MIME 131 Safety Instructions 6 Scheduled Leap Event Flag 66 Scheduled Leap Event Time 66 Search 81 Search Domains 73 Search NTPD Manual 84 Seconds of Week 69...

Страница 162: ... NTP 125 ss_profile 88 SSL 132 SSL Client Authentication 132 SSL Server Authentication 132 SSL LDAP 132 Stability 62 Static IP 73 Stratum 4 9 62 Levels 4 Stratum Levels 132 Subnet mask 73 Symmetricom Secure Network Time Protocol SS NTP 124 SymmTime client 10 SymmTime Time Utility 49 SyncServer How it uses the Sysplex timer 87 SyncServer Operations and Time Related Protocols 87 SyncServer Product S...

Страница 163: ... 37 41 44 48 TFTP 133 Time Sources 7 Time Code Input 22 Time Code Out 67 Time Code Output 22 Time Distribution 10 Time Distribution Model 9 Time Format 66 Time Glossary 121 Time Master Clock TMC 134 Time Protocols 87 Time Signing 133 Time Source choosing 33 Time StampServer TSS 134 Time to Live 59 Timecode Settings 66 Time of fix 69 Time Stamp 133 Time Stamp Request 133 Time Stamp Token 133 Time S...

Страница 164: ...tocol TCP 89 Triple DES 134 Trust 134 TSA 134 TSP 134 TSR 134 U U S Naval Observatory 5 UDP IP 134 University of Delaware 53 84 Update 73 Upload Certificate 64 US Assistance Center 137 User Datagram Protocol UDP 89 User name default 31 Using the Online Help 3 USNO 134 UTC 3 5 135 V Vault 135 Verification 135 Version 59 Virus 135 VPN 135 W W3C 135 Wait time 75 WAN 135 ...

Страница 165: ...7 2 5 3 Warrant 135 Web based interface 51 When 76 Wide area network 135 Wireless Application Protocol WAP 135 WPKI 135 WTLS 135 X X Coordinate 69 X 509 11 135 X 509 v3 Certificate Extension 136 Y Y Coordinate 69 Year 66 Z Z Coordinate 69 ...

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