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Network Time Server NTS–150 & NTS-150D User`s Manual

1. Key Word Definition Community 1 Community Name Public Trusted IP Address 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Use Trusted IP No R W Access read only Trap Enable No Trap Port 162 Community 2 Community Name System Trusted IP Address 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Use Trusted IP No R W Access Normal Trap Enable No Trap Port 162 Community 3 to 5 Community Name Trusted IP Address 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Use Trusted IP No R W Access read only Trap Enable No Trap Port 162 SNMP Global Enable Traps Yes The factory default settings are summarized as follows community one is called public and is set to read only access for the SNMP MIB community two is named system and it has normal access to the SNMP database all other communities are disabled All traps are disabled Many SNMP management utilities are written with these default assumptions and thus the Symmetricom SNMP is immediately usable without configuration NTS 150Ch1 fm Rev G NTS 150 User s Manual 89 Appendix D SNMP Simple Network Management Protocol Serial or Telnet Configuration D 3 D 4 Serial or Telnet Configuration Use Serial or Telnet Function F100 CONFIG to obtain information about the current SNMP NTP configuration or to change the IP addresses traps read write access or community names and parameters For details see Configuration of SNMP Parameters Using FTP on pag
2. 00000 c cece eee eee eee 61 F100 PN Password System User Name Change 200000ee eee 62 F100 PR Password Reset 0 000 cece cece eee ee ee eee ene 62 F100 PL Password Lock Request 0 cece eee eee 63 F100 PLS Password Lock Set 0 0 ccc ee ee eens 63 F100 PLR Password Lock Reset 0 cc cece cece eee eens 63 PlOOuR lt PING canre cet tetera ee eee a once aoe hates aoe ee ee kes 64 FIOO PEAME pce etes feat Dysta a Stare ote eee estes a a es 64 F100 QR Quiet Reset 0 0 0 ee eee een eens 64 F100 WG Write GPS 0 eee eee eens 66 Login Logout ack ad otek WES Be wd REG ROG MEN REE DERE Ee RERES ROK 67 Operator Logi sered rrsan eee tenet eee 67 Guest LOGIN sioi eea a dea se tanto contedes E AN aman aus acide R 67 LOQOUE Aitai es eR Ge EE ed glade gate teh Baer a a eM eae A oe ihe Be ees 67 5 NTS Generated Messages Error MESSAGES ooeec cece eek cer ede ee Ree er Bene eter AS avenger enact cer etka E tar eo 69 LED System Status Alerts 2 0 0 ccc eens 71 Solid Redas tess pede eee ie kde wh ie dee be eae Re Pe ee 71 Informational Messages 0 0 tees 71 A Network Time Protocol NTP V 3 0 Data Formats NTP V 3 0 Data Format per RFC 1305 0000s 74 NTP Data Packet 2 exude cnieda neh Shed ae eho kee eee Rae 8 Ye we aS 74 Leap INGICAtOl sce a teeter ity noe dd ated eee edn ee ee cee de Sie eae 74 Version Number si eisiaa dedii ai a aa cec
3. SYNTAX INTEGER automat icMode 0 timeMode 1 T T surveyStaticMode 2 surveyDynamicMode 3 MAX ACCESS read only STATUS current DESCRIPTION Mode of operation for satellite tracking users manual for a complete description of thes used for time applications modes 0 and 1 are See section 3 20 of the modes Generally Mode 2 is useful for more accurate position information when the unit is stationary or slowly moving and unit is moving quickly gps 4 gpsSatMaxSigStrength OBJECT TYPE SYNTAX INTEGER 0 30 MAX ACCESS read only STATUS current DESCRIPTION reception ma gps 5 gpsAltitude OBJECT TYPE SYNTAX INTEGER 2147483647 2147483647 MAX ACCESS read only mode 3 is for accurate position information when the Strongest signal strength of all tracking satellites in Trimble linear units Generally this number should be 4 or greater for good NTS 150Ch1 fm Rev G NTS 150 User s Manual 97 Appendix D SNMP Simple Network Management Protocol Symmetricom SNMP Enterprise MIB STATUS current DESCRIPTION Altitude of the GPS antenna in centimeters above or below th WGS 84 referenc llipsoid The reference ellipsoid is a rotated ellipse that is centered on the Earth s center of mass The surface of the ellipsoid is not necessarily the same as sea level Th ellipsoid surface may be as much as
4. Placing the Window Antenna Select the window with the best unobstructed view of the sky For equivalent views select the window with the best orientation The orientations in order of preference are as follows 1 Equator facing e g South for users in the Northern hemisphere 2 East West facing 3 Polar facing e g North for users in the Northern hemisphere Note Regardless of orientation use the window with the best view of the sky Mount the antenna on the lower part of the window where it has the best upward visibility by pressing the suction cup onto the window Make sure the window and suction cup surfaces are clean Note that some windows have metallic glazing that blocks GPS signals this prevents GPS receivers from tracking satellites and determining the time 12 NTS 150 User s Manual NTS 150Ch1 fm Rev G Cabling Chapter 2 Installation and Start Up 2 2 Cabling Refer to the figures below for NTS connector locations The numbers in the drawing refer to that connector s position in Table 2 1 Connect the cables in the order listed in Table 2 1 below In order to avoid network addressing conflicts be sure to configure network parameters before connecting the Ethernet cable Power Input 3 Chassis Ground 2 12V Antenna 1 Figure 2 3 NTS Back Panel Cabling Illustration AC Mains Power Input 3 Chassis Ground 2 12V Antenna 1 KOA J ik ruse ray Z Ta
5. noLeapWarningAndTimeIsSynchronized 0 lastMinuteHas61SecondsAndTimelIsSynchronized 1 lastMinuteHas59SecondsAndTimeIsSynchronized 2 alarmConditionAndLossOfTimeSynchronization 3 MAX ACCESS read only STATUS current DESCRIPTION This is a status code indicating normal operation a leap second to be inserted in the last minute of the current day a leap second to be deleted in the last second of the day or an alarm condition indicating the loss of timing synchronization Note a primary time server s outgoing NIP packet will have its leap indicator field set to ntpSysLeap ntp 7 ntpSysHostMode OBJECT TYPE SYNTAX INTEGER hostModelIsReserved0 0 hostModeIsSymmetricActive 1 hostModeIsSymmetricPassive 2 94 NTS 150 User s Manual NTS 150Ch1 fm Rev G Symmetricom SNMP Enterprise MIB Appendix D SNMP Simple Network Management Protocol hostModeIsClient 3 hostModelIsServer 4 hostModeIsBroadcast 53 hostModelIsReserved6 6 hostModelIsReserved7 7 IAX ACCESS read only STATUS current DESCRIPTION The value of this variable indicates the mode that the host is operating in Note this is the value of the time server s outgoing NTP packet mode field ntp 8 ntpSysStratum OBJECT TYPE SYNTAX INTEGER 1 255 MAX ACCESS read only STATUS current DESCRIPTION This is an integer that ranges from 1 to 255 indicating the s
6. 00 ccc eee ee 44 F100 SM Subnet Mask 0 tenes 45 F100 G Gateway 0 0 cc tees 45 F100 IC NET Port Network Configuration Entry Request 46 F100 P Change User Password 0 000 cece eee tee eee ees 46 F100 ST Self Test Status 0 0 0 teens 47 F100 VER Software Version Request 00 0 cece cence een eee 48 F100 CONFIG FTP Configuration of NTP amp SNMP 00 000s 49 Editing the MD5 keys on the NTP Server 00000 c ee een eens 52 Editing the MD5 keys on the NTP Client 0 0000 ceca eee eae 53 F100 LOCK Remote Lockout 0 0 0c cee eee eee nee 56 F100 UNLOCK Disable Remote Lockout 0 00000 c eee eee eee 56 F100 L Lock Display Request 0 2 00 eee 56 FIOO J JUMPCR orreri s EERE ERREN ee ee ae EENI ERS ey EES ees 57 F100 BH Burm HOST gissa das teens i eens eect oe edi E ce a ee es 57 F100 BU BUI c 5 cede dees beter kb ded er eeed ee a deere Med ada a ead 58 F100 BUB Burn BootLoader 000 0c cee eee 58 F100 BF Burn File System 0 00000 eects 59 FIOOKILL Reboot 0 00 eee 60 ii NTS 150 User s Manual NTS 150Ch1 fm Rev G F100 BL Burn Host Lock Request 0 cece tee 60 F100 BLS Burn Host Lock Set 0 0 ccc ee eens 61 F100 BLR Burn Host Lock Reset 0 0 ccc eee 61 F100 PRESETALL Password Reset All
7. ST lt Enter gt The NTS responds F100 lt SP gt ST lt SP gt FLAS lt SP gt lt STATUS gt lt SP gt S ASCII character F NTS function number space specify ST command input line terminator H CRC lt SP gt lt SP gt lt STATUS gt lt SP gt RAM lt SP gt EPRIAL lt SP gt lt SP gt lt STATUS gt lt SP gt VER lt SP gt lt SP gt lt STATUS gt lt CR gt lt LF gt where F 100 lt SP gt ST FLASH CRC RAM SERIAL VER lt STATUS gt kd lt CR gt lt LF gt An example of the response is F100 ST flash CRC PASS lt CR gt lt LF gt ASCII character F NTS function number space specify ST command specify flash checksum result specify RAM test result specify Utility Port test result specify version test result This test compares the version of the code against the version recorded in Non Volatile memory is either ASCII PASS or FAIL ASCII comma ASCII colon output line terminator PASS Ram PASS Serial PASS Ver NTS 150Ch1 fm Rev G NTS 150 User s Manual 47 Chapter 4 Serial or Telnet I O Functions Extended Function Commands 4 4 10 F100 VER Software Version Request Use Version Request to obtain the software version number of the NTS The version number is set at compile time and cannot be changed It may only be queried To query the version number send the following command F100 lt SP gt VER lt En
8. 4 3 6 F67 Leap Second Information Use Function 67 to retrieve information regarding upcoming leap seconds This is satellite information and cannot be changed through the NTS Although UTC leap second adjustments may be performed on four occasions annually in practice they are only performed twice June 30 and December 31 To return the leap second status send the following command F67 lt Enter gt where F ASCII character F function number lt Enter gt input line terminator lt CR gt lt LF gt output line terminator An example of the response might be F67 06 30 96 1 lt CR gt lt LF gt This response indicates there is a leap second addition during the last minute of June 30 1996 If there was no leap second pending the response might be F67 none lt CR gt lt LF gt 4 3 7 F72 Fault Status Request Use Function F72 to display the status of the antenna feed circuit and GPS lock status fault detectors within the NTS To display the status of the fault detectors send the following command F72 lt Enter gt The NTS responds F72 lt SP gt Antenna lt ANT STATUS gt GPS lt GPS STATUS gt lt CR gt lt LF gt where F ASCII character F 72 function number lt SP gt space lt ANT STATUS gt OPEN GOOD or SHORTED lt GPS STATUS gt LOCKED UNLOCKED lt CR gt lt LF gt output line terminator Sample entry F72 lt Enter gt The response might be F72 Antenna OK GPS Locked lt CR gt lt LF gt 40 NTS 150 U
9. F100 lt SP gt DHCP lt SP gt ENABLE lt Enter gt where F ASCII character F 100 NTS function number lt SP gt space DHCP specify DHCP command ENABLE command DHCP to be enabled lt Enter gt input line terminator To disable DHCP send the following command F100 lt SP gt DHCP lt SP gt DISABLE lt Enter gt where DISABLE command DHCP to be disabled The NTS responds Are you sure y N As a Safety feature after sending this command you have 10 seconds to respond affirmatively enter the letter y to the confirmation prompt after which the NTS executes the command and resets Within that 10 second time period any other response including no response results in the NTS canceling the command To query the status of DHCP send F100 lt SP gt DHCP lt Enter gt An example of the response is F100 DHCP OFF NTS 150Ch1 fm Rev G NTS 150 User s Manual 43 Chapter 4 Serial or Telnet I O Functions Extended Function Commands 4 4 3 4 4 4 F100 EA Ethernet Address The Ethernet address is assigned at the factory It is a fixed six byte hexadecimal value specific to the NTS NET Port The first three bytes are registered to Symmetricom Inc the last three bytes are the hex value identifying the NET Port To request the Ethernet address of the NTS NET Port send the following command F100 EA lt Enter gt The NTS responds F100 EBEA 00 A0 69 xx xx xXx lt CR gt lt LF gt where xx xx xx
10. 3 Click OK The Telnet None window appears Telnet None Bie Connect Edit Terminal Help 4 Click Connect the first item on the Telnet menu bar then select Remote System The Connect dialog box appears Host Name f gt Port fteinet gt TermType mo y ae 5 In the Host Name field enter the IP Address of the NTS Do not change the text in the two other fields which should read Telnet and VT100 6 Click Connect to start a Telnet connection to the NTS If the connection was successful a login prompt appears Telnet 206 54 0 22 BEI EA Connect Edit Terminal Help Welcome to TrueTime Network Interface User name If an hourglass appears instead it means the connection was not successful and you should repeat steps 1 5 22 NTS 150 User s Manual NTS 150Ch1 fm Rev G Serial Access 3 1 2 3 2 Chapter 3 Remote Operation 7 Enter the login name guest A password prompt appears 8 Enter the default password truetime one word all lower case A welcome message appears if the login and password are approved Telnet 206 54 0 22 oy x lt Connect Edit Terminal Help Welcome to TrueTime Network Interface User name gues Password ss Network Interface 182 9661U661 c 1998 1999 TrueTime Inc All Rights Reserved Login successful pS 9 Begin your Telnet session by entering F series commands Ending Telnet There are three ways to end
11. To change the login user name send the following command F100 PN lt Enter gt The NTS responds User Name Change for xyz123 Enter new user name When you enter a new user name the NTS responds with Confirm new user name Enter the same new user name again to confirm the spelling If the same new user name has been entered twice the NTS responds with User name change for xyz123 successfully changed In this case the new user name will be used for the next Telnet login However if the new user name is entered differently the second time the NTS responds with ERROR User names do NOT match New user name rejected In this case the old user name will be used for the next Telnet login 4 4 26 F100 PR Password Reset Use Password Reset when changing the current login user name and password to defaults To reset the passwords to factory defaults send the following command F100 PR lt Enter gt The NTS responds Are you sure y N 66 99 If you answer y and press Enter the NTS executes the command 62 NTS 150 User s Manual NTS 150Ch1 fm Rev G Extended Function Commands Chapter 4 Serial or Telnet I O Functions 4 4 27 4 4 28 4 4 29 As a Safety feature after sending this command you have 10 seconds to respond affirmatively enter the letter y to the confirmation prompt after which the NTS executes the command and resets Within that 10 second time period any other respo
12. are the six hex digits of the unit s unique address An example of the response is F100 EA 00 A0 69 00 06 2A Attempts to set this field will be rejected with a syntax error message The F100 EA and F36EA command reports in the Ethernet address IEEE format which may result in numbers which differ from those reported by your system Since the Ethernet address is a fixed value as long as the unit is up and running you can ping the NTS to be sure you can safely ignore these differences F100 IP IP Address To obtain the IP address of the NTS NET Port send the following command F100 IP lt Enter gt The NTS responds F100 IP nnn nnn nnn nnn lt CR gt lt LF gt where nnn nnn nnn nnn is the dotted decimal address notation An example of the response is F100 IP 206 54 0 33 Changing the IP Address requires the NTS to reset A verification prompt appears prior to execution To set the IP address and restart the NTS send the following command F100 IP nnn nnn nnn nnn lt FEnter gt Sample entry F100 IP 206 54 0 21 lt Enter gt The response is Are you sure y N As a Safety feature after sending this command you have 10 seconds to respond affirmatively enter the letter y to the confirmation prompt after which the NTS executes the command and resets Within that 10 second time period any other response including no response results in the NTS canceling the command 44 NTS 150
13. 2 1 1 Mounting Instructions To securely mount the NTS 150 in any EIA standard 19 inch 48 26 cm rack system use the equipment supplied with the Rack Mount Kit included with the NTS 150 and follow the steps outlined below The Rack Mount Kit contains e 2 mounting brackets part number 206 719 e 4 flat head Phillips screws part number 241 008 005 8 32 x 5 8 To rack mount the NTS 150 1 Remove and discard the two factory installed flat head Phillips screws from the front end of an NTS 150 side panel 2 Place a rack mount bracket on the side panel so that the countersunk screw holes in the bracket line up with the screw holes in the panel Replace the factory installed screws with screws from the Rack Mount Kit 3 Place two of the screws from the Rack Mount Kit through the holes in the bracket and into the NTS 150 4 Tighten the screws to the following specifications Use a 2 size Phillips bit with an inch ounce torque setting of 4 4 to 4 high 5 Repeat steps 1 4 to install the other rack mount bracket on the unit s other side panel NTS 150Ch1 fm Rev G NTS 150 User s Manual 9 Chapter 2 Installation and Start Up Site Preparation 6 Place the NTS 150 in a 1 34 inch 4 445 cm opening in any EIA Standard 19 inch 48 26 cm rack system and position the unit so that the rack holes line up with the holes in the bracket fo a 4 i Y f y sooda E Rack Mount
14. 72 MIB 19 87 89 Protocol 6 MIB II 87 Protocol 6 Mills Dr David 2 79 Web Site 80 Minor 69 Mode 74 Survey Static 37 Mounting Chassis 9 N NET Port 2 6 8 10 21 23 Configuration Single Entry F100 41 Default Gateway F100 G 45 IP Address F100 IP 44 Network Configuration Commands F36 or F100 37 Initial 18 19 Using Serial Telnet Commands 41 Subnet Mask F100 SM 45 Index 106 NTS 150 User s Manual NTS 150Ch1 fm Rev G Index Network Time Protocol See NTP Non Standard Features 101 Non Volatile Memory 47 NTP 6 Broadcast Mode Editing MD5 Keys 52 53 with Authentication 52 53 81 without Authentication 82 83 Client 6 Configuration 57 Using FTP 51 55 Data Packet 16 74 Multicast 8 Synchronization Specifications 6 V 3 0 Data Format RFC 1305 74 get and set Commands 49 ntpAuthFail 94 ntpControllnput 96 ntpControlOutput 96 ntpDesiredAcc 94 ntpEstErr 94 ntplnErrors 93 ntpInPkts 93 ntpOutPkts 93 ntpSysHostMode 94 ntpSysLeap 94 ntpSysPoll 95 ntpSysPrecision 95 ntpSysRefClockldent 96 ntpSysRootDelay 95 ntpSysRootDisp 95 ntpSysStratum 95 ntp conf file 51 53 ntp keys file 51 53 O Operating Altitude 4 Operating Mode Request F53 37 Operator Login Password 67 P Packet 6 See also NTP Data Packet Parameters Network Configuration Initial 18 19 Password Changing 67 Default Telnet 23 Size 46 Password Lock Request F100 PL 63 Password Lock Reset F100 PLR 6
15. Once a connection is established the current date and time is sent out the connection as a ASCII character string and any data received is thrown away The service closes the connection after sending the quote UDP Based Daytime Service This daytime service is defined as a datagram based application on UDP A server listens for UDP datagrams on UDP port 13 When a datagram is received an answering datagram is sent containing the current date and time as a ASCII character string the data in the received datagram is ignored DAYTIME String Format The string format for the DAYTIME Protocol conforms to the Unix workstation time expression except the time is in UTC rather than local time The syntax is as follows DDD MMM XX YYYY HH MM SS UTC where DDD the day Sun Mon Tue Wed Thus Fri Sat MMM the month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec XX day of the month HH hour 24 hour format of that day MM minutes of that hour SS seconds of that minute 86 NTS 150 User s Manual NTS 150Ch1 fm Rev G D 1 SNMP Simple Network Management Protocol About SNMP SNMP management software allows a network user to remotely monitor and configure an IP host that supports an SNMP agent An SNMP agent is protected from unauthorized use through a security scheme The Symmetricom
16. Once you have completed debugging your system you can prevent incoming messages from appearing on the command line by turning off the debug option flags Polling The designated server contacts every server each time it polls for time Out of the responses it picks the best one and uses that as its primary synchronization source The best one is determined based on a combination of stratum lowest is best network delays closest is best advertised precision smallest is best plus other criteria that is not detailed If the best server goes away after consecutive polling periods with no response from that server the unit will choose one of the remaining servers to be the synchronizing source In a client server mode the server or any NTP client adjusts the poll interval to maintain timing between 1 10 milliseconds if possible The interval starts out at the default value of every 64 seconds but then lengthens based on the size of the calculated offsets The server also starts estimating the average drift of the internal oscillator and uses this information to refine its polling period The typical polling period ends up being about 5 to 8 minutes This polling period is self adjusting and can not be adjusted externally NTS 150Ch1 fm Rev G NTS 150 User s Manual 83 TIME and DAYTIME Protocols C 1 TIME Protocol as per RFC 868 TIME protocol provides a site independent machine readable date and time The TIME service sends
17. valid or not This flag equals 1 when ACTS is used as the time synchronization source and 0 for all other sources m acts 14 actsBaudRate OBJECT TYPE SYNTAX INTEGER baud300 300 baud1200 1200 baud9600 9600 MAX ACCESS read only STATUS current DESCRIPTION Indicates the baud rate setting for the ACTS modem The ACTS dial up service accepts 300 or 1200 baud Note this is a rare case where faster is not better and 300 baud yields the best time accuracy fr gt acts 2 98 NTS 150 User s Manual NTS 150Ch1 fm Rev G Symmetricom SNMP Enterprise MIB Appendix D SNMP Simple Network Management Protocol actsFailRedial OBJECT TYPE SYNTAX INTEGER 0 9999 MAX ACCESS read only STATUS current DESCRIPTION When the dial up session fails to connect this is the time in seconds to wait to try again actsMaxCallPeriod OBJECT TYPE acts 3 SYNTAX INTEGER 0 999 MAX ACCESS read only STATUS current DESCRIPTION This is the maximum time in minutes the ACTS unit will wait between successful calls to the ACTS service acts 4 actsPhoneNum OBJECT TYPE SYNTAX DisplayString SIZE 0 25 MAX ACCESS read only STATUS current DESCRIPTION P This is the phone number of the ACTS dial up service including any prefixes needed to reac
18. you must specify your IP address and the directory on your hard drive that contains the configuration file Set commands cause the NTS to reboot A confirmation prompt appears to which you must respond affirmatively y within 10 seconds before the NTS executes the command and resets In a set command line you can enter the elements ntp snmp and get in any order If you want to configure both NTP and SNMP at the same time place both elements in the command line 50 NTS 150 User s Manual NTS 150Ch1 fm Rev G Extended Function Commands Chapter 4 Serial or Telnet I O Functions Configuration of NTP Parameters Using FTP To configure NTP parameters using FTP and a text editor follow the steps outlined below During this process the FTP software creates default configuration files ntp conf and ntp keys in your directory to hold the data you have requested Do not change the names of these files The NTS 150 does not support NTP client mode Any server settings in ntp conf will be ignored 1 Send a get command F100 config get ntp host 192 168 1 14 dir temp The NTS responds Host config ip 192 168 1 14 configured successfully Source file etc ntp conf bytes read 70 Dest File temp ntp conf bytes written 70 Source file etc ntp keys bytes read 70 Dest File temp ntp keys bytes written 70 Configuration files transferred successfully
19. 100 meters different from actual sea level gps 6 gpsLongitude OBJECT TYPE SYNTAX INTEGER 2147483647 2147483647 MAX ACCESS read only STATUS current DESCRIPTION Longitude location of GPS antenna where 2147483647 is maximum east longitude 2147483647 is maximum west longitude and 0 is Greenwich England To calculate the longitude in radians use the following formula gpsLongitude PI 2 31 1 longitude in radians For degrees gpsLongitude 180 2 31 1 longitude in degrees Note longitude varies from PI to PI in radians and 180 to 180 in degrees gps 7 gpsLatitude OBJECT TYPE SYNTAX INTEGER 2147483647 2147483647 MAX ACCESS read only STATUS current DESCRIPTION Latitude location of GPS antenna where 2147483647 is the North Pole 2147483647 is the South Pole and 0 is the equator To calculate the latitude in radians use the following formula gpsLatitude PI 2 2 31 1 longitude in radians For degrees gpsLatitude 90 2 31 1 latitude in degrees Note latitude varies from PI 2 to PI 2 in radians and 90 to 90 in degrees gps 8 actsGroupValid OBJECT TYP SYNTAX INTEGER T actsGroupIsInvalid 0 actsGroupIsValid 1 MAX ACCESS read only STATUS current DESCRIPTION A test flag indicating if data contained in this SNMP ACTS group is
20. 2 bad enabled sig level 0 00 F60 prn 3 good enabled tracked current sig level 13 64 F60 prn 4 bad enabled sig level 0 00 F60 prn 5 bad enabled sig level 0 00 F60 prn 6 good enabled sig level 0 00 F60 prn 7 bad enabled sig level 0 00 F60 prn 8 bad enabled sig level 0 00 F60 prn 9 bad enabled sig level 0 00 F60 prn 10 bad enabled sig level 0 00 F60 prn 11 bad enabled tracked sig level 3 00 F60 prn 12 bad enabled sig level 0 00 F60 prn 13 bad enabled sig level 0 00 F60 prn 14 bad enabled sig level 0 00 F60 prn 15 good enabled tracked current sig level 22 77 F60 prn 16 bad enabled sig level 0 00 F60 prn 17 good enabled sig level 0 00 F60 prn 18 bad enabled sig level 0 00 F60 prn 19 bad enabled sig level 0 00 F60 prn 20 bad enabled tracked sig level 3 00 F60 prn 21 good enabled tracked current sig level 20 15 F60 prn 22 good enabled sig level 0 00 F60 prn 23 good enabled tracked current sig level 15 27 F60 prn 24 bad enabled sig level 0 00 F60 prn 25 bad enabled tracked sig level 3 47 F60 prn 26 good enabled sig level 0 00 F60 prn 27 bad enabled sig level 0 00 F60 prn 28 bad enabled sig level 0 00 F60 prn 29 good enabled tracked current sig level 21 46 F60 prn 30 bad enabled sig level 0 00 F60 prn 31 good enabled tracked current sig level 18 10 F60 prn 32 bad enabled sig level 0 00 NTS 150Ch1 fm Rev G NTS 150 User s Manual 39 Chapter 4 Serial or Telnet I O Functions Function Commands
21. 2 re 0 Sec 3 re 0 Sec 4 re 0 Sec 5 re 0 Flash successfully programmed CRC32 OxE3EQECAE If more than six flash sectors are written during this process you must rewrite both the bootloader sectors 0 to 5 and the program binary sectors 6 to 16 4 4 19 F100 BF Burn File System Use Burn File System when upgrading software to write a file system to the flash memory To write the file system to the flash send the F100 BH command with the FTP host file path and name and then send the following command F100 BF lt Enter gt The NTS responds Are you sure y N 66 99 If you answer y and press Enter the NTS executes the command As a Safety feature after sending this command you have 10 seconds to respond affirmatively enter the letter y to the confirmation prompt after which the NTS executes the command and resets Within that 10 second time period any other response including no response results in the NTS canceling the command NTS example execution Burning file 182 9005v003 fs with size 524288 Sec 20 Sec 21 Seci 22 Sees 23 Sec 24 Sec 23 NTS 150Ch1 fm Rev G NTS 150 User s Manual 59 Chapter 4 Serial or Telnet I O Functions Extended Function Commands 4 4 20 4 4 21 Sec 26 Sec 27 Sec 28 F100 KILL Reboot Use KIL L after upgrading software to reboot the unit KIL Lis a case sensitive command When entering this command use all capi
22. 43 Renaming 52 Session 21 28 71 72 Timers 29 SMI 6 SNMP 6 8 19 87 88 Configuration Using FTP 54 get and set Commands 49 SNTP 2 6 8 Client 6 V 3 0 Data Format RFC 2030 77 Software Version Request F100 VER 48 F18 36 Specifications Environmental 4 Interface 8 Internal Timing Performance 5 NTP Synchronization 6 Physical 3 Power 5 Status Indicators LED 7 Storage Altitude 4 Stratum 74 76 Structure of Management Information SMI 6 Subnet Mask F100 SM 45 Supported Applications 8 Supported Protocols 6 Survey Static Mode 37 Synchronization 2 5 6 16 T TCP 6 85 86 TCP IP 2 8 90 Telnet 2 6 8 Commands and Responses Common Elements 35 List 33 34 Semicolon used as replacement 32 Default Password 23 Interface Login Passwords 67 Internet Access 21 23 Login During Set Up 22 Logout 67 Session Timer 21 29 Temperature 4 5 Index NTS 150Ch1 fm Rev G NTS 150 User s Manual 109 Index Terminal 10 23 24 Terminal Strip 48 VDC model 13 Test Status F100 ST RAM test 47 Time and Date Entry Request F03 36 TIME Protocol 6 85 Time F100 PT 64 Timeout 23 Timers Session 29 Tracked 37 38 Tracked Satellite 38 Trap 88 90 trapMsgColdStart 92 trapMsgCrossCheckAlarm 93 trapMsgGpsAntennaFault 93 trapMsgGpsUnlocked 93 trapMsgNewSyncType 93 trapMsgNtpAlarm 92 trapMsgSnmpAuthFail 92 U UDP 6 74 85 86 91 User Name Changing F100 PN 62 User Password Changi
23. 9 pin D serial connector for serial input output The optional configuration of the NTS 150 with a front panel display indicates unit status and time Limited Warranty Each new product manufactured by Symmetricom is warranted for defects in material or workmanship for a period of one year from date of shipment Limited Warranty Defects in material or workmanship found within that period will be replaced or repaired at Symmetricom s option without charge for material or labor provided the customer returns the equipment freight prepaid to the Symmetricom factory under this limited warranty Symmetricom will return the repaired equipment freight prepaid to the customer s facility This one year Limited Warranty does not apply to any software or to any product not manufactured by Symmetricom Limitation Of Liability By purchasing any product from Symmetricom the Buyer consents to and agrees that the Buyer s sole and exclusive remedy for any damages or losses incurred by the Buyer as a result of Symmetricom s breach of its one year Limited Warranty for defects in materials and workmanship or otherwise in connection with any claim respecting the product shall be limited to the repair or replacement of the product or a refund of the sales price of the product In no event shall the Buyer be entitled to recover consequential damages or any other damages of any kind or description whatsoever NTS 150 User s Manual NTS 150Ch1
24. F67 40 F72 40 Fault Status Request F72 40 Formats Serial Telnet Commands 37 Frame 8 Frequency 5 Front Panel 7 Display Power Up Sequence 16 Power Up Sequence 15 FTP 6 8 Configuring NTP 51 55 Configuring SNMP 54 Installing and Using Software 49 Function Commands 33 G Gateway F100 G 45 Good Satellite 38 GPS 2 11 16 75 Lock Status Fault Detector F72 40 gpsAltitude 97 gpsGroupValid 97 gpsLatitude 98 gpsLongitude 98 gpsNumCurrentSats 97 gpsNumTrackSats 97 gpsSatMaxSigStrength 97 gpsSatTrackMode 97 Guest Login Password 67 H Host 6 76 HTTP 2 Humidity 4 HyperTerminal Reconnecting to Last Session 28 Setting Up a Session 26 28 Starting 24 26 j IEEE 8 Informational Messages 71 Installation 9 Interface Specifications 8 Internal Timing Performance Specifications 5 Internet Access through Telnet 21 23 IP Address 44 Index NTS 150Ch1 fm Rev G NTS 150 User s Manual 105 Index J JP5 Jumper Settings F100 J 57 L Leap Indicator 74 Leap Second 40 74 Command F67 40 LED 7 Local Time Source Precision 75 Location 2 Lock Display Request F100 L 56 Login 21 46 62 Serial Telnet Interface Passwords 67 Telnet During Set Up 22 Logout 67 M Mast Mounting Antenna 11 MD5 91 Keys 52 53 79 NTP Broadcast Mode with Authentication 52 53 81 without Authentication 82 Protocol 6 Memory Checksum Test Status F100 ST 47 Messages Error 69 70 Informational 71
25. GPS Synchronized Receiver integral to the NTS operates on the L1 1575 42 MHz signal and the C A code 1 023 MHz bit rate with a minimum signal level of 162 0 dBW and a maximum signal level of 137 0 dBW The antenna system supplied is designed to provide the proper signal levels to the receiver with the cable length supplied lt mj Threaded Cable Housing Figure 2 1 Basic Antenna Use of a Splitter Components To run multiple units with a single 12 V antenna use a splitter Do not use a BNC T connector Lead In Cable The L1 GPS antenna is designed to operate with up to 150 ft 60 96 m of RG 59 coax cable The optional Down Converter is designed to operate with up to 1 500 ft 457 2 m of RG 58 coaxial cable For details and illustrations on cabling see page 12 2 1 4 GPS Roof Mounted Antenna Installation When selecting a site for the antenna find an outdoor location that provides full 360 degree visibility of the horizon In most cases this means locating the antenna as high as possible Any obstruction will degrade unit performance by blocking the satellite signal or causing a reflection that creates signal interference Blocked signals can significantly increase the time for satellite acquisition or prevent acquisition all together Mast Mounting Mast top mounting is the preferred mounting method and special brackets are provided to mount the antenna to a pipe or the peak of a building The antenna mounti
26. Total number of authentication failures This is a subset of ntpInErrors ntp 4 ntpDesiredAcc OBJECT TYPE SYNTAX INTEGER 0 2147483647 AAX ACCESS read only STATUS current DESCRIPTION The desired worst case time accuracy in microseconds that the time server will attempt to steer to This variable is related to ntpEstError Should ntpEstError be greater than ntpDesiredAcc the P alarm condition will be set ntpSysLeap will be equal to 3 ote outgoing NTP packets will have their leap indicator field set to ntpSysLeap ntp 5 ntpEstErr OBJECT TYPE SYNTAX INTEGER 0 2147483647 MAX ACCESS read only STATUS current DESCRIPTION The current estimated time error in microseconds of the time server This variable is related to ntpEstError Usually this value is small and constant for a given type of time server However when primary synchronization is lost this value will slowly increase with time as the time server s oscillator flywheels away from true time Should ntpEstError be greater than ntpDesiredAcc the NTP alarm condition will be set ntpSysLeap will be equal to 3 Note a primary time server s outgoing NTP packets will have its leap indicator field set to ntpSysLeap ntp 6 ntpSysLeap OBJECT TYPE SYNTAX INTEGER
27. User s Manual NTS 150Ch1 fm Rev G Extended Function Commands Chapter 4 Serial or Telnet I O Functions 4 4 5 F100 SM Subnet Mask To return the subnet mask of the NET Port send the following command F100 SM lt Enter gt The NTS responds F100 SM nnn nnn nnn nnn lt CR gt lt LF gt An example of the response is F100 SM 255 255 255 125 Changing the Subnet Mask requires the NTS to reset A verification prompt appears prior to execution To set the subnet mask and restart the NTS send the following command F100 SM nnn nnn nnn nnn lt Enter gt Sample entry F100 SM 255 255 255 240 lt Enter gt The response is Are you sure y N lt CR gt lt LF gt As a Safety feature after sending this command you have 10 seconds to respond affirmatively enter the letter y to the confirmation prompt after which the NTS executes the command and resets Within that 10 second time period any other response including no response results in the NTS canceling the command 4 4 6 F100 G Gateway To obtain the Default Gateway of the NTS NET Port send the following command F100 G lt Enter gt The NTS responds F100 G nnn nnn nnn nnn lt CR gt lt LF gt An example of the response is F100 G 206 54 0 1 Changing the Default Gateway requires the NTS to reset A verification prompt appears prior to execution To set the Default Gateway and restart the NTS send the following command F100 G nnn nnn nnn nnn lt Enter g
28. back to the originating source the UTC time in seconds since midnight on January 1 1900 This protocol may be used either above the Transmission Control Protocol TCP or above the User Datagram Protocol UDP When used via UDP the TIME service works as follows Server Listen on port 37 45 octal Client Send an empty datagram to port 37 Server Send a datagram containing the UTC time as a 32 bit binary number Client Receive the TIME datagram The server listens for a datagram on port 37 When a datagram arrives the server returns a datagram containing the 32 bit time value If the server is unable to determine the time at its site it should discard the arriving datagram and make no reply C 1 1 The Time Protocol Format The time is the number of seconds since 00 00 midnight 1 January 1900 UTC such that the time 1 is 12 00 01 AM on January 1 1900 UTC this base will serve until the year 2036 NTS 150Ch1 fm Rev G NTS 150 User s Manual 85 Appendix C TIME and DAYTIME Protocols DAYTIME Protocol as per RFC 867 C 2 C 2 1 C 2 2 C 2 3 DAYTIME Protocol as per RFC 867 DAYTIME protocol pertains to a daytime service a useful debugging and measurement tool A daytime service simply sends the current date and time as a character string without regard to the input TCP Based Daytime Service This daytime service is defined as a connection based application on TCP A server listens for TCP connections on TCP port 13
29. have just successfully entered the Enable DHCP command DHCP is disabled Meaning You have just successfully entered the Disable DHCP command OK Meaning Command accepted and processed as specified Goodbye Meaning The NTS has just terminated a session 72 NTS 150 User s Manual NTS 150Ch1 fm Rev G Network Time Protocol NTP V 3 0 Data Formats This appendix describes the following two data formats e NTP V 3 0 per RFC 1305 page 74 e SNTP V 3 0 per RFC 2030 page 77 The NTS fully supports NTP version 4 0 backwards compatible with NTP v 2 RFC 1119 and v 3 RFC 1305 and SNTP as per RFC 2030 All RFCs are published with approval of the Internet Activities Board found on the Internet by running any search engine and typing RFC in the search field or REC if you have the number NTS 150Ch1 fm Rev G NTS 150 User s Manual 73 Appendix A Network Time Protocol NTP V 3 0 Data Formats NTP V 3 0 Data Format per RFC 1305 A 1 A 1 1 NTP V 3 0 Data Format per RFC 1305 NTP Data Packet The layout of the NTP data packet information following the UDP header is shown below and each element is described on the following pages Synchronizing Distance Root Delay Version 3 Synchronizing Dispersion Root Dispersion Version 3 Reference Clock Identifier Reference Timestamp Originate Timestamp Receive Timestamp Transmit Timestamp Authenticator Figur
30. input line terminator lt CR gt lt LF gt output line terminator Sample entry F53 lt Enter gt The response might be F53 SURVEY STATIC SATS 6 lt CR gt lt LF gt NTS 150Ch1 fm Rev G NTS 150 User s Manual 37 Chapter 4 Serial or Telnet I O Functions Function Commands 4 3 5 F60 Satellite List Request Use Function 60 to list current satellites and to see the relative signal strength of satellites the NTS is tracking Signal strength is given in units in the range of 0 to 25 The NTS monitors five variables the PRN number good bad enabled disabled tracked and current To request the list send the following command F60 lt Enter gt where F ASCII character F 60 function number lt Enter gt input line terminator The NTS responds F60 lt SP gt prn NN lt SP gt good lt SP gt enabled lt SP gt tracked lt SP gt current lt SP gt Ssig lt SP gt level lt SP gt lt LEVEL gt lt CR gt lt LF gt where prn NN pseudo random number the prn number is a unique identifier for a particular satellite s communication path for example satellite 3 might have the prn number 15 if that satellite is recalled to Earth and replaced by satellite 42 the communication path of satellite 42 might also be assigned prn 15 enabled disabled Enabled refers to a factory default configuration value that allows the GPS to track all satellites on the F60 list good bad Good means all three o
31. reference source Operates with window and roof mounted antennas If the number of current satellite signals drops to 1 or 2 the unit uses GPS as reference source for 10 minutes If the number of satellite signals drops to zero the unit keeps GPS as the reference source for 5 minutes while it locks onto another GPS satellite signal NTS 150Ch1 fm Rev G NTS 150 User s Manual 17 Chapter 2 Installation and Start Up NET Port Network Parameters First Time Configuration 2 4 NET Port Network Parameters First Time Configuration After connecting the GPS antenna supplying power to the NTS and achieving successful stabilization see section GPS Window Mounted Antenna 140 619 Installation on page 12 configure the network parameters and functions for the first time Once the parameters are input then connect the Ethernet cable and the serial cable The configurable NET Port network parameters and functions are e IP Address e Subnet Mask e Default Gateway e DHCP e Remote Control For this first configuration enter the appropriate parameter values and function settings through the serial port referred to in this manual as the Utility Port via a serial device connected at 9600 8N1 Subsequently you can edit parameter values and function settings through the Utility Port or using Telnet see Section Extended Function Commands on page 41 To set the NET Port network parameter values an
32. same new password again to confirm the spelling If the same new password has been entered twice the NTS responds with OK lt CR gt lt LF gt In this case the new password will be used for the next Telnet login However if the new password is entered differently the second time the NTS responds with ERROR Passwords do NOT match New password rejected In this case the old password will be used for the next Telnet login If you have forgotten your user name and or password you can go into bootloader mode and reset them In bootloader mode the unit recognizes the default user name and password You can then use F100 PR see page 62 or F100 PRESETALL see page 61 to change the user name and password to defaults for use in the normal mode or you can use F100 PN see page 62 and F100 P the above command to change the user name and password to whatever you want Then you can go back into normal mode the and the user name and password you just set will work 46 NTS 150 User s Manual NTS 150Ch1 fm Rev G Extended Function Commands 4 4 9 F100 ST Self Test Status Chapter 4 Serial or Telnet I O Functions Use Self Test Status to query the status of the power up tests The response contains the PASS FAIL status of the flash memory checksum test RAM test Utility Port test and version check To query the self test status send the following command F100 lt SP gt StT lt Enter gt where F 100 lt SP gt
33. set the maximum connection speed to 10Base T send the following command F100 lt SP gt BASET lt SP gt 10 lt Enter gt where 10 set maximum Base T speed to 10 In both these cases the NTS responds Are you sure y N As a Safety feature after sending this command you have 10 seconds to respond affirmatively enter the letter y to the confirmation prompt after which the NTS executes the command and resets Within that 10 second time period any other response including no response results in the NTS canceling the command For details about an initial 100Base T setting see NET Port Network Parameters First Time Configuration on page 18 42 NTS 150 User s Manual NTS 150Ch1 fm Rev G Extended Function Commands Chapter 4 Serial or Telnet I O Functions 4 4 2 F100 DHCP DHCP Control Use F100 DHCP to enable or disable Dynamic Host Configuration Protocol DHCP allows the NTS to auto configure its network address provided that you have enabled DHCP and that the unit is installed on and connected to at power up an Ethernet LAN with a DHCP server If these conditions are not met the NTS reverts to those network parameters in use at the last power down By default DHCP is off at initial installation Disable DHCP before changing any Network parameter Changing DHCP status causes a software reset of the NTS DHCP status can be queried without rebooting the unit To enable DHCP send the following command
34. the get or set parameter from the F100 NTP Configuration command Recovery Action Re enter the command specifying the desired action ERROR Can t open source file lt NAME gt Meaning The file containing the needed data is unavailable Recovery Action Check file location and directory names to verify the path is accurate then re enter the command ERROR Can t open dest file lt NAME gt Meaning The destination file is unavailable Recovery Action Check file location and directory names to verify the path is accurate then re enter the command ERROR Can t write file lt NAME gt Meaning Data from the source file cannot be copied to the destination file Recovery Action Check file location and directory names to verify the path is accurate then re enter the command ERROR Configuration failed Meaning Your attempt to configure new parameters was unsuccessful Recovery Action Verify parameter values then re enter the command ERROR Configuration type is not specified Meaning You did not specify the file type Recovery Action Re enter the command specifying SNMP and or NTP 70 NTS 150 User s Manual NTS 150Ch1 fm Rev G LED System Status Alerts Chapter 5 NTS Generated Messages 5 2 5 2 1 5 3 5 3 1 5 3 2 5 3 3 5 3 4 5 3 5 5 3 6 LED System Status Alerts Solid Red Meaning Solid Red means there is no signal from the time source or that a major alarm f
35. the quality of the synchronization input option When the synchronization input option is GPS then the NTS will self determine the accuracy Once the accuracy has been determined then the NTS sets the root dispersion equal to ten times the square root of the sum of the squares of the precision and the accuracy except for the ACTS synchronization option where the root dispersion is set equal to the accuracy NTS 150Ch1 fm Rev G NTS 150 User s Manual 75 Appendix A Network Time Protocol NTP V 3 0 Data Formats NTP V 3 0 Data Format per RFC 1305 Reference Clock Identifier The reference clock identifier is a 32 bit code identifying the particular type of timing source Strata 0 and 1 use a four octet left justified zero padded ASCII string The NTS 150 module operates as Stratum 1 and uses this four octet string based on the local time source input as shown in Table A 2 below This setting is determined based on the NTS synchronization input option Table A 2 Local Time Source Input Local Time Source Input Reference Identifier String GPS GPS NTP NTP Reference Timestamp The reference timestamp is a 64 bit timestamp format representing the local time at the last update The NTS 150 module s reference timestamp is the last time that a valid synchronization source signal was present Originate Timestamp The originate timestamp is a 64 bit timestamp format representing the time that the request
36. with any serial access terminal emulation software program such as Procomm or HyperTerminal The following section illustrates a terminal connection using HyperTerminal a popular Windows based application All commands are input using conventional F series type commands see Command List on page 33 These examples apply only to systems using Windows 95 98 NT Check with your System Administrator if you are using a different operating system such as Macintosh or UNIX 3 2 2 HyperTerminal Starting HyperTerminal To start HyperTerminal 1 Click the Start button on the task bar 2 Select Programs gt Accessories gt HyperTerminal gt HyperTerminal The Connection Description dialog box appears Connection Description x yy New Connection Enter a name and choose an icon for the connection Name pe Icon Cancel 24 NTS 150 User s Manual NTS 150Ch1 fm Rev G Serial Access Chapter 3 Remote Operation 3 Enter a name such as NTS for this connection in the Name box and click OK The Connect To dialog box appears Connect To x B NTS Enter details for the phone number that you want to dial Country code United States of America 1 z Area code 707 Phone number Connect using Apache V90 Internal NetE xpress S 4 Inthe Connect using box use the drop down menu to select your modem s COM port COM1 in this example then click OK The COM1 Properties dialog box appears showing the
37. 0 000 IP 000 000 000 000 IP 000 000 000 000 IP 000 000 000 000 ENDC NAME VIND 0 TRAP NO ACCESS R IP 000 000 000 000 IP 000 000 000 000 IP 000 000 000 000 IP 000 000 000 000 ENDC NAME VIND 0 TRAP NO ACCESS R IP 000 000 000 000 IP 000 000 000 000 IP 000 000 000 000 IP 000 000 000 000 ENDC END 54 NTS 150 User s Manual NTS 150Ch1 fm Rev G Extended Function Commands Chapter 4 Serial or Telnet I O Functions where MIB for future use only GenTraps switches on off all traps sysContact sysName and sysLocation standard MIB II variables forsystem name location and contact personnel NAME VIND TRAP yes no ACCESS read write and IP address configurable SNMP community variables 2 Configure any of the following parameters e GenTraps set to YES if you want SNMP traps to be generated If you do not use SNMP on your network set GenTraps to NO e Community Names e Access W for read write R read only e IP Addresses 3 Return the revised data to the NTS by sending a set command F100 config set snmp host 192 168 1 14 dir temp The NTS responds Are you sure y N If you answer y the NTS responds Source file temp snmp conf bytes read 1274 Dest File config snmp conf bytes written 1274 Configuration files transferred successfully and then resets As a Safety feature after sending this command you have 10 seconds to respon
38. 1 Numerics 10Base T 100Base T 8 14 42 Control Command F100 BASET 42 48 VDC Model Cabling 13 Power Specifications 5 A AC Model Cabling 13 Power Specifications 5 Access 2 21 88 Disable Remote Lockout F100 UNLOCK 56 Internet 21 23 Lock Display Request F100 L 56 Remote Lockout F100 LOCK 56 Serial 23 28 Accuracy 6 Acquisition 11 ACT Connection Speed Indicator LED 7 actsBadCalls 99 actsBadReply 700 actsBaudRate 98 actsBusyLine 100 actsFailedInit 99 actsFailRedial 99 actsGoodCalls 99 actsGroupValid 98 actsMaxCallPeriod 99 actsNoAnswer 100 actsNoCarrier 100 actsNoDialTone 100 actsNoOnTimeMark 100 actsNumberOfCalls 99 actsPhoneNum 99 Administrator 19 Antenna 3 4 10 11 14 15 Feed Circuit Status F72 40 Installation 9 Mast Mounting 11 Applications List of Supported 8 Authentication 88 Broadcast Mode with 52 53 81 Broadcast Mode without 82 83 Auto Configure 43 B Backward Compatibility 37 Bad Satellite 38 Broadcast Mode Editing MD5 Keys 52 53 Index with Authentication 52 53 81 without Authentication 82 83 Burn BootLoader F100 BUB 58 Burn File System F100 BF 59 Burn Host Lock Request F100 BL 60 Burn Host Lock Reset F100 BLR 67 Burn Host Lock Set F100 BLS 67 Burn Host F100 BH 57 Burn F100 BU 58 C Cabling 13 14 Change User Name F100 PN 62 Change User Password F100 P 46 Chassis 3 14 Cold Boot 15 Commands and Responses Serial Telnet Common Ele
39. 3 Password Lock Set F100 PLS 63 Password Reset All F100 PRESETALL 61 Password Reset F100 PR 62 Index NTS 150Ch1 fm Rev G NTS 150 User s Manual 107 Index Password System User Name Change F100 PN 62 PDU 88 Physical Specifications 3 Ping F100 Pl 64 Position 15 16 21 71 Power Specifications 5 Precision 74 75 PRN Number for Satellite 38 Procomm 27 Protocols List of Supported 6 Q Quiet Reset 64 R Rack Mounting Instructions 9 RAM 47 test status F100 ST 47 Reboot F100 KILL 60 Receiver 11 Reference Timestamp 76 Remote Control Lockout F100 LOCK 56 RFC 1155 6 RFC 1157 6 87 RFC 1212 6 RFC 1213 6 87 88 RFC 1305 2 6 74 76 80 RFC 1321 6 80 RFC 1354 87 RFC 2030 2 6 77 RFC 2132 6 RFC 854 6 RFC 867 6 86 RFC 868 2 6 107 RFC 959 6 RG 58 11 RG 59 3 17 RJ 45 2 8 10 14 Root Delay 75 RS 232 8 10 14 23 Pinouts and Signal Levels 23 S Satellite 11 Acquisition 15 Current 38 Enabled 38 Good Bad 38 Number Currently Tracked F53 37 PRN Number 38 Tracked List 38 Security 67 88 Index 108 NTS 150 User s Manual NTS 150Ch1 fm Rev G Index Self Test Status F100 ST 47 Serial 2 8 10 21 24 Access 23 28 Disable Remote Lockout F100 UNLOCK 56 Lock Display Request F100 L 56 Remote Control Lockout F100 LOCK 56 Commands and Responses Common Elements 35 List 33 34 Semicolon used as replacement 32 Interface Login Passwords 67 Server 6 21
40. 50Ch1 fm Rev G Function Commands Chapter 4 Serial or Telnet I O Functions 4 3 3 4 3 4 F36 NET Port Network Configuration Entry Request Use Function F36 to request or set network parameters Changes require the NTS to reset F36 commands are for backward compatibility and are identical to the F100 function command series used for the same purpose see the sections starting on page 41 F36 commands are for backward compatibility with previous Symmetricom products F36 and F100 commands can both be used to query or change specific NET Port network parameters The F36 EA and F100 EA command reports in the Ethernet address IEEE format which may result in numbers which differ from those reported by your system Since the Ethernet address is a fixed value as long as the unit is up and running you can ping the NTS to be sure you can safely ignore these differences F53 Operating Mode Request Use Function F53 to verify the number of satellites currently being tracked F53 also reports the unit s operating mode which is always Survey Static To see the number of tracked satellites send the following command F53 lt Enter gt The NTS responds F53 lt SP gt lt MODE gt lt SP gt lt gt lt SP gt SATS lt CR gt lt LF gt where F ASCII character F 53 function number lt SP gt space lt MODE gt SURVEY STATIC E ASCII colon lt gt number of satellites being tracked lt Enter gt
41. An example ntp conf file might look like Note ALL servers are optional If your GPS antenna is connected and positioned correctly the servers listed here are not used These servers are used only when the GPS unit fails PS failure is detected automatically Note that when the NTS is sing these timeservers the system is at best running with 20 illisecond precision Up to 10 NTP servers can be assigned in his file The addresses below are examples and should be hanged as required by your network configuration Ook Se a The following are public Symmetricom NTP Timeservers Uncomment one or both to enable NTP fallback to Symmetricom if GPS synchronization is lost Add any other server address server 206 54 0 20 server 206 54 0 21 Private time servers example only server 192 31 68 1435 Uncomment the broadcast line below to enable NTP broadcast mode with MD5 using key 1 The key may be omitted but is less secure Ifa key is used here a corresponding entry for that key must appear in the NTP key file A maximum of 20 keys for broadcast can be defined on this line broadcast 192 16813255 key 1 NTS 150Ch1 fm Rev G NTS 150 User s Manual 51 Chapter 4 Serial or Telnet I O Functions Extended Function Commands The line below lists the currently trusted keys S the NTP keys file for the actual keys and their corresponding key numbers Keys 1 and 2 are listed as an example All key
42. For safety the default response to this prompt is negative The NTS will not execute the command unless you respond affirmatively by entering the letter y within 10 seconds Within that time period any other response including no response results in the NTS canceling the command 32 NTS 150 User s Manual NTS 150Ch1 fm Rev G Command List 4 2 Command List Chapter 4 Serial or Telnet I O Functions The following table lists all serial Telnet commands that are used to operate administer and maintain the NTS The Utility Port is ready to receive these commands once the power up sequence is complete The F100 series is used mainly to request or set NTS NET Port parameters Changing any network parameter causes the NTS to reboot Table 4 1 F Series Function Commands Command Function Parameters F03 Time Date Request MM DD YYYYHH MM SS F18 Software Version Request equivalent to F100 VER F36 Network Configuration Entry Request EA IP SM G equivalent to corresponding F100 commands F53 Operating Mode Request F60 Satellite List Request F67 Leap Second Information Request F72 Fault Status Request F100 BASET 100Base T 10Base T Entry Request 10 100 change requires confirmation within 10 seconds F100 DHCP DHCP Control ENABLE DISABLE change requires confirmation within 10 seconds F100 EA Ethernet Address F100 IP IP Address HHH
43. HHH HHH HHH change requires confirmation within 10 seconds F100 SM Subnet Mask HHH HHH HHH HAH change requires confirmation within 10 seconds F100 G Default Gateway HHHH HHHH HHHH HHHH change requires confirmation within 10 seconds F100 IC Network Configuration Request IP SM G F100 P Password Change Request XXXXXXX F100 ST Self Test Results Request F100 VER Software Version Request F100 CONFIG NTP and SNMP Configuration GET SET NTP SNMP IP ADDRESS YES NO W R change requires confirmation within 10 seconds F100 LOCK Remote Lockout LOCK change requires confirmation within 10 seconds F100 UNLOCK Disable Remote Lockout UNLOCK F100 L Lock Display Request NTS 150Ch1 fm Rev G NTS 150 User s Manual Chapter 4 Serial or Telnet I O Functions Command List Additional F100 Extended Function commands are available for updating software changing passwords pinging remote units and obtaining UTC time in seconds Table 4 2 F Series Additional F100 Extended Function Commands Command Function Parameters F100 J Jumper Setting Request F100 BH Burn Host FTP host address file path file name F100 BU Burn F100 BUB Burn BootLoader F100 BF Burn File System F100 BL Burn Host Lock Request F100BLS Burn Host Lock Set change requires confirmation within 10 seconds F100 BLR Burn Host L
44. NTS supports a SNMP version 1 agent with the MIB II and Enterprise MIB databases The material in this section assumes you already have an understanding of SNMP If that is not the case we recommend SNMP SNMPv2 and CMIP written by William Stallings and published by Addison Wesley Publishing Company This book is considered by the community to be the definitive introduction to SNMP Another good reference is How To Manage Your Network Using SNMP by Marshal T Rose and Keith McClogurie For more technical references see RFC 1157 the definition of SNMPv1 RFC 1213 the definition of MIB II and RFC 1354 the IP Forwarding table addition to MIB II All RFCs are published with approval of the Internet Activities Board found on the Internet by running any search engine and typing RFC in the search field or RFC if you have the number NTS 150Ch1 fm Rev G NTS 150 User s Manual 87 Appendix D SNMP Simple Network Management Protocol SNMP Configuration D 2 SNMP Configuration SNMP offers a security authentication scheme that is based on a common password shared by the management station and a group of agents A group of hosts are known as a community Any management station or agent can be a member of any combination of communities Typically a manager will need to change the SNMP community information from the SNMP agent factory defaults for security purposes However the factory defau
45. Network Time Server NTS 150 amp NTS 150D User s Manual NTS 150 Revision G February 2005 The information in this manual is subject to change without notice and should not be construed as a commitment by Symmetricom Inc Furthermore Symmetricom Inc reserves the right without notice to make changes to equipment design as advances in engineering and manufacturing methods warrant The material described in this manual may be used or copied only in accordance with the terms of the license pertaining to the software and hardware referred to herein 2003 Symmetricom Inc All rights reserved Printed in the U S A The following are registered trademarks or trademarks of their relative companies or organizations Microsoft Microsoft Windows HyperTerminal and Procomm The following are registered trademarks or trademarks of their relative companies or organizations TrueTime TrueTime Inc Symmetricom Symmetricom Inc Microsoft Microsoft Windows HyperTerminal and Procomm MDS is the trademark or registered trademark of RSA Security Inc This product includes software derived from the RSA Security Inc MD5 Message Digest Algorithm which is provided under license from RSA Security Inc Network Time Protocol NTP David L Mills 1992 2003 Permission to use copy modify and distribute NTP software and its documentation for any purpose and without fee is hereby granted provided that the above copyright notice ap
46. O Functions Login Logout 68 NTS 150 User s Manual NTS 150Ch1 fm Rev G 5 1 5 1 1 NTS Generated Messages Error Messages ERROR 01 VALUE OUT OF RANGE Meaning You have entered a valid command with an invalid parameter value Recovery Action Re enter the command using a valid parameter ERROR 02 SYNTAX Meaning You have entered a valid command with a minor syntax error The NET Port network interface software has detected the error Recovery Action Re enter the command using valid syntax ERROR Invalid Command Meaning You have entered an invalid command Recovery Action Consult the manual for the correct command and re enter ERROR Can t create netdevice lt NAME gt Meaning The NTS can not create the device needed to map the host to a drive Recovery Action Restart the Unit If this error message persists contact Symmetricom Technical Customer Service ERROR Can t set host lt NAME gt ip lt ADDRESS gt Meaning You have incorrectly entered a parameter or there is no room currently in the Host table for another IP Address Recovery Action Verify correct parameter values If correct restart the NTS If this error message persists contact Symmetricom Technical Customer Service NTS 150Ch1 fm Rev G NTS 150 User s Manual 69 Chapter 5 NTS Generated Messages Error Messages 5 1 6 5 1 7 5 1 10 5 1 11 ERROR Action get or set is not specified Meaning You have omitted
47. Port Settings tab COM1 Properties 2 x Port Settings Bhs per second Databits fe o YS Paty None Stopbits 1 y Elow contiot Hardware a Restore Defaults Cancel Apply 5 Edit the fields in the Port Settings dialog box as follows Bits per second 9600 Data Bits 8 Parity None Stop Bits 1 Flow control None NTS 150Ch1 fm Rev G NTS 150 User s Manual 25 Chapter 3 Remote Operation Serial Access 6 Click OK The NTS HyperTerminal window appears indicating the NTS is now connected through the Utility Port Setting Up a HyperTerminal Session To set up a HyperTerminal session 1 From the File menu in the session window select Properties The NTS Properties dialog box appears showing the Connect To tab 26 NTS 150 User s Manual NTS 150Ch1 fm Rev G Serial Access Chapter 3 Remote Operation 3 In the Emulation box use the drop down menu to select VT100 terminal type do not select the Auto detect option 4 Click Terminal Setup and configure the terminal by selecting the appropriate options in the Terminal Settings dialog box with a VT100 terminal the recom mended settings are pictured below Terminal Settings x m Cursor C Block Underline M Bink gt Terminal Modes T Keypad application mode T Cursor keypad mode I 132 column mode Character set fasci z Conc 5 Click OK The NTS Properties dialog box
48. RJ 45 10Base T 100Base T RS 232 9 pin D wired as DTE SERIAL I O NET RS 232 14 NTS 150 User s Manual NTS 150Ch1 fm Rev G Power Up 2 3 2 3 1 Chapter 2 Installation and Start Up Power Up At power up cold boot the front panel LED is red Satellite acquisition may take up to 20 minutes When the NTS is locked to GPS the LED will change from red to blinking green For units with the optional display e At power up cold boot the front panel display is blank e The display shows Booting Starting and Loading over a span of approximately 30 seconds while the unit initializes e Once the unit has initialized you can enter settings through the serial port or Telnet command line interface e When the unit starts acquiring time it displays Time Not Available followed by Satellites Tracked Where can equal 1 6 Once time has been acquired it displays the UTC time and date A G following the date indicates that GPS is the time source e Time acquisition can take approximately 20 minutes but varies widely depending on conditions such as the antenna position Satellites Tracked 1 Satellite Acquisition Network Time Servers with firmware version 8 or higher have been optimized for both window and roof mounted GPS antennas Specifically the new system firmware allows the unit to use a single GPS satellite versus three satel
49. S 150Ch1 fm Rev G NTS 150 User s Manual 35 Chapter 4 Serial or Telnet I O Functions 4 3 Function Commands 4 3 1 F03 Time and Date Request Function Commands Use Function F03 to request time and date The response is UTC date and time To request TIME AND DATE send the following command F03 lt Enter gt The NTS responds FO03 lt SP gt lt mm gt lt dd gt lt yyyy gt lt SP gt lt HH gt lt MM gt lt SS gt lt CR gt lt LF gt where F 03 lt SP gt lt mm gt lt dd gt lt yyyy gt lt HH gt lt MM gt lt SS gt lt Enter gt lt CR gt lt LF gt Sample Entry The response might be ASCII character F function number space one or two digit month ASCII character slash one or two digit day four digit year if you manually entered this data one or two digit hours ASCII character for a colon two digit minutes two digit seconds replacement character input line terminator output line terminator F03 lt Enter gt F03 UTC 01 07 1996 02 48 29 lt CR gt lt LF gt Year entries less than 10 will be displayed as a single digit For example 12 12 1 is read December 12 2001 4 3 2 F18 Software Version Request Use Version Request to query the software version number of the NTS The version number is factory set and cannot be changed This command is for backwards compatibility and is identical to the F100 VER command see page 48 36 NTS 150 User s Manual NTS 1
50. Screws p gt SA Ga 7 Use the appropriate screws to secure the brackets to the rack 8 Ensure that the operating ambient temperature does not exceed 50 C Installation requires the use of standard rack mount hardware 2 1 2 Necessary Equipment The equipment you need to get started includes e Power source e GPS antenna connection that supports 12 V e An Ethernet LAN with one port available for the NTS network connection e An Ethernet cable with an RJ 45 connector for the NET Port Category 5 Ethernet cable is recommended for 100Base T operation e A set of network address parameters for the NET Port that delivers NTP time and allows remote control of the unit over the Internet A serial interface device either PC or dumb terminal capable of 9600 8N1 An RS 232 cable and null modem connector to connect the 9 pin D RS 232 port to the serial device The NTS 150 requires a 12 V antenna and may severely damage any antenna that does not support 12 V For non standard antenna types contact Symmetricom for assistance 10 NTS 150 User s Manual NTS 150Ch1 fm Rev G Site Preparation Chapter 2 Installation and Start Up 2 1 3 Antenna Information ii pit ra Voltage Requirement and Signal Levels lt q 12VGPS Antenna The NTS requires a 12 V GPS antenna Any antenna that does not support 12 V may be severely damaged if plugged into the NTS lt Coaxial Cable The
51. Telnet e Close it from your terminal by selecting Exit from the Connect menu e Enter an exit command such as exit or quit e Let it timeout If no commands are received for 15 minutes the NTS automatically terminates the session Serial Access The RS 232 connector provides serial access The RS 232 connector is located next to the NET Port see Figure 1 1 on page 7 This connector is labeled Serial I O and is referred to as the Utility Port Table 3 1 below describes the Utility Port s RS 232 pinouts and signal levels Serial time output is not available on the Utility Port Table 3 1 RS 232 Pinouts and Signal Levels NTS 9 to 25 PIN ADAPTER CABLE SIGNAL DESCRIPTION 9 pin 25 pin OPEN 1 8 DCD CARRIER DETECT IN RXD 2 lt 3 TRANSMITTED DATA OUT TXD 3 gt 2 RECEIVED DATA OPEN 4 20 DTR DATA TERMINAL READY GND 5 lt gt 7 SC SIGNAL GROUND OPEN 6 6 DSR DATA SET READY OPEN 7 4 RTS REQUEST TO SEND OPEN 8 5 CTS CLEAR TO SEND OPEN 9 22 RI RING INDICATOR NTS 150Ch1 fm Rev G NTS 150 User s Manual 23 Chapter 3 Remote Operation Serial Access 3 2 1 Serial Line Settings Serial I O settings are factory set and cannot be changed The default serial format is Data Rates 9600 bits second Word Length 8 bits Parity None Stop Bits 1 The Utility Port can be connected either to a terminal or to a computer using a null modem cable and used in conjunction
52. al tone This may be caused by a broken phone line to the time server acts 10 actsNoCarrier OBJECT TYPE SYNTAX Counter MAX ACCESS read only STATUS current DESCRIPTION Time server s internal modem found no carrier No modem was found at the other end and maybe the phone number for ACTS is wrong acts 11 actsBusyLine OBJECT TYPE SYNTAX Counter MAX ACCESS read only STATUS current DESCRIPTION Time server s internal modem found ACTS line busy 2 acts 12 actsNoAnswer OBJECT TYPE SYNTAX Counter MAX ACCESS read only STATUS current DESCRIPTION The remote ACTS mode did not answer the call acts 13 actsBadReply OBJECT TYPE SYNTAX Counter MAX ACCESS read only STATUS current DESCRIPTION The syntax of the reply from remote modem was incorrect possibly due to line noise acts 14 actsNoOnTimeMark OBJECT TYPE SYNTAX Counter MAX ACCESS read only STATUS current DESCRIPTION The reply from remote modem had no on time mark possibly due to line noise 3 acts 15 tA Z 1s Non Standard Features This appendix contains information on optional features that may have been added to your device at the factory For a standard device it is normal for this appendix to be empty NTS 150Ch1 fm Rev G NTS 150 User s Manual 10
53. ample Entry F100 config get snmp host 192 168 1 14 dir temp The NTS responds Source file config snmp conf bytes read 1274 Dest File temp snmp conf bytes written 1274 Configuration files transferred successfully An example snmp conf file might look like the following with each string appearing as a single line on your screen MIB config ttmib o GenTraps NO sysContact Symmetricom Inc 707 528 1230 sysName NTS 150 sysLocation Santa Rosa CA 95407 NAME public VIND 1 TRAP YES ACCESS R IP 192 168 001 230 IP 192 168 1 129 IP 000 000 000 000 IP 000 000 000 000 ENDC NAME private VIND 1 TRAP YES ACCESS W IP 000 000 000 000 IP 000 000 000 000 IP 000 000 000 000 IP 000 000 000 000 ENDC NAME VIND 0 TRAP NO ACCESS R IP 000 000 000 000 IP 000 000 000 000 IP 000 000 000 000 IP 000 000 000 000 ENDC NAME VIND 0 TRAP NO ACCESS R IP 000 000 000 000 IP 000 000 000 000 IP 000 000 000 000 IP 000 000 000 000 ENDC NAME VIND 0 TRAP NO ACCESS R IP 000 000 000 000 IP 000 000 000 000 IP 000 000 000 000 IP 000 000 000 000 ENDC NAME VIND 0 TRAP NO ACCESS R IP 000 000 000 000 IP 000 000 000 000 IP 000 000 000 000 IP 000 000 000 000 ENDC NAME VIND 0 TRAP NO ACCESS R IP 000 000 000 000 IP 000 000 000 000 IP 000 000 000 000 IP 000 000 000 000 ENDC NAME VIND 0 TRAP NO ACCESS R IP 000 000 00
54. ault has been detected Recovery Action Check your antenna installation for correct position obvious hardware problems or trouble with lines or wires If you still need assistance contact Symmetricom at 707 528 1230 or support symmetricom com Informational Messages Messages in this section inform you of events and do not require any action on your part Deleted previously set IP host address Meaning Your last action deleted the previously set IP host address NOTICE Cannot respond to command because Utility Port session has priority Meaning A Utility Port session has started and takes precedence Wait until it is over before logging in or expecting a response to an entered Telnet command Host lt NAME gt ip lt ADDRESS gt configured successfully Meaning Host configuration was successful Source file lt NAME gt bytes read lt NUMBER gt Meaning Source file was successfully read Dest file lt NAME gt bytes written lt NUMBER gt Configuration files transferred successfully Meaning Information was successfully transferred to the destination file Restarting the Unit Please wait Meaning A command has just been executed that requires a soft restart of the NTS The restart happens immediately after this message is sent NTS 150Ch1 fm Rev G NTS 150 User s Manual 71 Chapter 5 NTS Generated Messages Informational Messages 5 3 7 5 3 8 5 3 9 5 3 10 DHCP is enabled Meaning You
55. ber to the one sent in the packet If the digest numbers do not agree then the packet is ignored Thus only servers with trusted MD5 keys may send time to a client The keys are known to both the NTP client and server through separate key files usually named ntp keys in the etc directory The name of the file and its location are determined by the k option when the NTP program is invoked In actual practice for normal NTP client to server communications using explicit IP addresses with multiple servers it is not necessary to use MD5 That is because the NTP client spends a great deal of time filtering out packets with incorrect time Anyone attempting to send false time to a NTP client would be discarded However when broadcast time is used then the client accepts the packet more readily and in this case can be fooled The same is true if only one NTP server is used to synchronize an NTP client and a network attacker substitutes a false NTP server for the good one Under these conditions the NTP client has nothing to judge the time against and if the false information is persistent then the client will be forced to eventually reset its time In this case it is worth the extra processing load to use MDS Setting up an NTP broadcast server and NTP client using MD5 authentication requires modifications to the ntp keys file Editing MDS keys is covered in Chapter 4 see the sections starting on page 52 The followi
56. ble in this enterprise group One important variable in this group is ntpSysLeap because it is the clearest indication if the NTS is telling correct time When GPS is used as the time synchronization source the GPS Enterprise MIB Group provides detailed information about the satellites used by the NTS time server Complete GPS satellite information exists on the number of satellites tracked and used for timing purposes their signal strengths the tracking mode altitude longitude and latitude of the GPS antenna This information allows you to properly set up the GPS antenna and to use the unit for time information When ACTS is used as the time synchronization source the ACTS Enterprise MIB Group provides detailed information on the ACTS dial up modem time service Complete information on the number and success of the ACTS phone calls as well as a detailed break down of the various possible modem and line failures that can occur This information allows you to fine tune calling frequency with the desired time accuracy and assess the telephone line quality of the connection to the ACTS service Obtaining the enterprise MIB information requires you to have an SNMP management program running on your computer Variable Definitions This section contains a complete and formal definition of Symmetricom s SNMP enterprise MIB group including all the variables in Symmetricom s Enterprise MIB along with the MIB OID address and data types An ele
57. but will not allow the module to be synchronized by another host Stratum The stratum is an eight bit integer providing the stratum level of the time source The NTS 150 module operates in stratum 1 denoting a primary reference Poll Interval The poll interval is a signed eight bit integer used as the exponent of two to yield in seconds the minimum interval between consecutive messages For example a poll interval value of six implies a minimum interval of 64 seconds The NTS does not alter the setting of this field Precision The precision is a signed eight bit integer used as the exponent of two to yield in seconds the precision of the local time source and any other hardware affecting the base level jitter of the time server This field is set to approximate the time stamping resolution of the NTS which is 10 us So the precision byte is set to 16 which is equivalent to a precision of 15 26 us Synchronizing Distance Root Delay Version 3 The root delay is a signed 32 bit fixed point number representing the predicted round trip delay in seconds to the primary synchronizing source The fraction point is between bits 15 and 16 This value is set to 0 seconds in the NTS 150 module Synchronizing Dispersion Root Dispersion Version 3 The root dispersion is a signed 32 bit fixed point number representing the maximum error in seconds relative to the primary synchronizing source This value is a function of the precision and
58. cator Figure 1 1 NTS Front Panel While starting the optional display shows Booting Starting and Loading Until the unit has acquired GPS satellites the display shows Time Not Available Once it starts tracking GPS satellites it displays Satellites Tracked 1 4 Once it has acquired enough GPS satellites it briefly displays Initializing NTP followed by the UTC time and date The UTC date is followed by a G which indicates the time source the unit is using NTS 150Ch1 fm Rev G NTS 150 User s Manual 7 Chapter 1 General Information Interface Specifications 1 13 Interface Specifications 1 13 1 NET Port Ethernet Interface Type Standard RJ 45 8 pin connector for 10Base T and 100Base T standards Frame Format IEEE 802 3 Supported Protocols Applications Telnet SNTP DHCP SNMP TCP IP NTP and Broadcast NTP FTP 1 13 2 Utility RS 232 I O Interface Data Serial functions as listed on page 36 Data Rates 9600 Data Bits 8 Parity None Stop Bits 1 Connector Male 9 pin D subminiature wired as DTE located on the front panel Serial I O settings are factory set and cannot be changed The following chart shows pin assignments for the RS 232 connector Table 1 1 RS 232 Interface Pin Assignments Pin Assignment 1 NC 2 RXD 3 TXD 4 NC 5 GND 6 9 NC 8 NTS 150 User s Manual NTS 150Ch1 fm Rev G Installation and Start Up 2 1 Site Preparation
59. ctronic form of this file was included with this manual If the disk has been misplaced or corrupted a copy can be obtained from Symmetricom s NTP Systems web site http www ntp systems com Select Products and Literature gt Reference Material to get there The file s name is TrueTime MIB and should compile for virtually any SNMP management software It has been verified to work for Sun s Solaris X SNMP and Hewlett Packard s OpenView management software packages NTS 150Ch1 fm Rev G NTS 150 User s Manual 91 Appendix D SNMP Simple Network Management Protocol Symmetricom SNMP Enterprise MIB TrueTime DEFINITIONS BEGIN IMPORTS MODULE IDENTITY OBJECT TYPE Integer32 FROM SNMPv2 SMI Counter FROM RFC1155 SMI DisplayString FROM SNMPv2 TC TRAP TYPE FROM RFC 1215 iso OBJECT IDENTIFIER 1 org OBJECT IDENTIFIER iso 3 dod OBJECT IDENTIFIER org 6 internet OBJECT IDENTIFIER dod 1 private OBJECT IDENTIFIER internet 4 enterprises OBJECT IDENTIFIER private 1 trueTimeEnt OBJECT IDENTIFIER enterprises 1896 trueTime MODULE IDENTITY LAST UPDATED 99061900002 ORGANIZATION TRUETIME INC CONTACT INFO Technical Support DESCRIPTION Tr
60. d affirmatively enter the letter y to the confirmation prompt after which the NTS executes the command and resets Within that 10 second time period any other response including no response results in the NTS canceling the command NTS 150Ch1 fm Rev G NTS 150 User s Manual 55 Chapter 4 Serial or Telnet I O Functions Extended Function Commands 4 4 12 4 4 13 4 4 14 F100 LOCK Remote Lockout Use Remote Lockout to disable remote control capability and secure the NTS from Telnet access You can issue this command from Telnet or the serial port The default setting is Unlocked To once again activate remote access via Telnet you must unlock the unit using the serial port see F100 UNLOCK Disable Remote Lockout below To lock the NTS to prevent remote access send the following command F100 LOCK lt Enter gt The NTS responds Are you sure y N If you answer y and press Enter the NTS executes the command As a Safety feature after sending this command you have 10 seconds to respond affirmatively enter the letter y to the confirmation prompt after which the NTS executes the command and resets Within that 10 second time period any other response including no response results in the NTS canceling the command 66 99 If you are using Telnet when you issue this command and answer y and press Enter the NTS executes the command by saying Goodbye and closing the Telne
61. d function settings through the Utility Port use F100 IC F100 IC IP xxx xxx xxx xxx SM xxx XXX XXX XXX GIXXX XXX XXX XXX 18 NTS 150 User s Manual NTS 150Ch1 fm Rev G Verify Functionality Chapter 2 Installation and Start Up 2 5 2 6 2 7 Verify Functionality To verify that the unit is running 1 Ping the NET Port IP Address 2 If this action fails check the configuration values assigned to the NET Port Correct parameters as necessary using the serial Telnet Function F100 IC command described on page 46 3 If ping fails again verify with your system administrator that the values used are correct Then re enter parameters as necessary Wrap Up amp Advanced Operation When the LAN interfaces are operational and time is being reported the unit has achieved its basic level of functionality For quick start information see the Quick Start card that came packaged with this manual For remote operation see Chapter 3 For details on serial Telnet commands see Chapter 4 If you wish to use SNMP the NTS supports a SNMP version 1 agent with the MIB II and Enterprise MIB databases you must first edit the snmp conf file see Section F100 CONFIG FTP Configuration of NTP amp SNMP on page 49 for details SymmTime 2003 SymmTime 2003 is a free download that automatically synchronizes your Windows PC s clock to any NTP Network Time Protocol server accessible from your computer SymmTime i
62. da oe aaa Meee ae Reel ee 24 Starting HyperTerminal 0 0 0 0 c ccc tenes 24 ia tical ne peta I E Swiss Geek Baa Wiel RAAT BEY be bee Sieh abe 26 Setting Up a HyperTerminal Session 00000 eens 26 Reconnecting to your last HyperTerminal session 2 5 28 SESSION TIMES eyed err wea wads ace Med Beale OE ee Dee a EE dae ele 29 Utility Port Session Timer 0 00 cette 29 Telnet Session TIME ican dove v a ate aera oud AAE REONE nak aay aoa bead ee 29 Serial or Telnet I O Functions Overview and Formal i4 t04 stad eda hve adeno added ne ba 31 Command LIST scncccsediiin eGea dete nak a a ee E ee ee eae a Ad ow dae REIRES 33 Function Commands 0 00 ccc ce een eee a Ra 36 F03 Time and Date Request 0 0 000 c eee eee ee 36 F18 Software Version Request 0 00 c cece eee eee 36 F36 NET Port Network Configuration Entry Request 0 0 05 37 F53 Operating Mode Request 0 cece eee eee eens 37 F60 Satellite List Request 0 0 cece tees 38 F67 Leap Second Information 0 000 ccc ene 40 F72 Fault Status Request 0 tenes 40 Extended Function Commands 0 0c cece een eect tenet ene 41 F100 BASET 100 BASE T 10 BASE T Control nannaa naana aaa 42 F100 DHCP DHCP Control 0 0 00 43 F100 EA Ethernet Address 00000 cece eee 44 F100 IP IP Address
63. e 54 Although this option is available it is much faster and easier to configure SNMP parameters over the Internet For details see Remote Operation on page 21 Symmetricom SNMP Enterprise MIB Introduction A Management Information Base MIB is a database of managed objects that have a hierarchical structure There are common or vendor specific managed objects The Internet community has over 1 000 objects registered The objects themselves are representations of real physical network properties or information Using a TCP IP network and Symmetricom s SNMP Enterprise MIB you can remotely obtain information on the health and status of the NTP application and the primary time synchronization source using the SNMP version protocol The Enterprise MIB database has five variable groups the Trap Message Group the Network Time Protocol Group the Network Time Server Control Group the GPS Group and the ACTS Group Presently the control group is preliminary and is not implemented in the current version of software Traps are sent on Change of Status COS There are three types of traps NTP Status GPS Status and GPS Antenna Status All of them report failures as well as the return to active status The settings are as follows NTP Status NTP Client Mode NTP Unlocked NTP Locked e GPS Status GPS Locked GPS Unlocked e GPS Antenna Status GPS Antenna Fault GPS Antenna OK In NTP Client Mode NTP is using another NTP serv
64. e A 0 NTP Data Packet Information Layout Leap Indicator The leap indicator is a 2 bit code that signals an impending leap second to be added or subtracted in the last minute of the current day Leap year codes and their corresponding meanings are shown in Table A 1 below Table A 1 Leap Year Codes Bit 0 Bit 1 Meaning 0 0 Normal Operation 0 1 61 second last minute 1 0 59 second last minute 1 1 Clock not synchronized The unsynchronized state is indicated by the NTS whenever the estimated synchronization error is greater than the root dispersion Such conditions typically occur following turn on until synchronization with the external source has been achieved and whenever the external synchronization input has been removed and the extrapolated time error has exceeded the value of the root dispersion 74 NTS 150 User s Manual NTS 150Ch1 fm Rev G NTP V 3 0 Data Format per RFC 1305 Appendix A Network Time Protocol NTP V 3 0 Data Formats Version Number The version number is a three bit integer that specifies the NTP version The NTS will copy this field from the client requesting packet and return it in this field if it is equal to either 2 or 3 NTP version 1 0 packets are not supported Mode The mode is a three bit integer that determines the functions the NTS module will perform The NTS module operates in mode four or server mode Mode four operation allows the module to synchronize hosts
65. e eee eee 75 MOC nea a hae Pees be ea eee ed ne E E A a A 75 SUAU i aaar ig ESEE RARER Rekive we lgacace eae ue PERRIER ESES 75 Poll Intervals s ees sdb ia a ada a e a a a a ER Oe ned a 75 Precision eeii dade a e doe ed el E a ok O eS Bea eG EA ee ee dos 75 Synchronizing Distance Root Delay Version 3 0000e eee eee 75 Synchronizing Dispersion Root Dispersion Version 3 5 75 Reference Clock Identifier 0 00 0 c eee eee 76 Reference Timestamp 0 00 cece eee eee eee 76 Originate Timestamp 0 00 cee eee 76 Receive Timestamp cece cece eee teens 76 Transmit Timestamp presoek aed evereesedeg der R E A E a A ee dat ens 76 Autentica erpii tee nee eek Rnd bea hia eA ee aes 76 SNTP V 3 0 Data Format per RFC 2030 0000 c cece eee 77 NTS 150Ch1 fm Rev G NTS 150 User s Manual iii MDS Authentication and NTP Broadcast Mode Introduction to MD5 Authentication Protocol 2000 cece eee eee 79 NTP Broadcast Mode with MD5 Authentication 0 2020 eee eee 81 NTP Broadcast Mode without Authentication 0 0000 eee eee ee 82 Configuration of NTP on the Timeserver 0000 c cece eee eee 82 Configuration of NTP on the Time Client 0 000 cece eee eee 83 Polling 83 TIME and DAYTIME Protocols TIME Protocol as per RFC 868 0 0 ccc cee nes 85 The Time Protocol Format 00 0c cece eee eee
66. eee 85 DAYTIME Protocol as per RFC 867 00 ccc ccc ee eee 86 TCP Based Daytime Service 0 0 0 0 86 UDP Based Daytime Service 0 0 0 00 cc tenes 86 DAYTIME String Format 0 0000 cece 86 SNMP Simple Network Management Protocol About SNMP ped od fuer idee degrees eee eiidaa hee E a eae ee pial eed 87 SNMP Configuration 0 00 000 ete eee 88 Serial or Telnet Configuration 0 000 ccc teens 90 Symmetricom SNMP Enterprise MIB 0000 cece eee 90 INTRODUCTION z ifs Se ees Gees Wie RO Bhawan heated pele Mes 90 Variable Definitions 0 000 EA AAA EANA te tees 91 Non Standard Features Non Standard Features 000 ccc cette ee 101 NTS 150 User s Manual NTS 150Ch1 fm Rev G General Information This manual provides you with all of the information necessary to properly install and operate the NTS 150 Network Time Server hereafter referred to as the NTS The information in this manual includes any normal maintenance and adjustment data that may be required to facilitate field repairs 1 1 Conventions The conventions used in this manual are Text Indicates body text Italics Emphasizes important information Used with bold text to call attention to important information lt Key gt For input referring to keys that are labeled on your keyboard For example lt Enter gt means press the Enter key for a line terminator lt SP gt means pres
67. endix C of RFC 1305 Complete RFC information is available at the following web site _http www ietf org An NTP or SNTP client compatible with the computer platform you use and configured to use the NTS NET Port IP address is required for accurate network synchronization In this manual refer to Appendix A and Appendix B for details about NTP and SNTP protocols and Appendix D for details about SNMP and MIB 6 NTS 150 User s Manual NTS 150Ch1 fm Rev G Front Panel Features Chapter 1 General Information 1 12 Front Panel Features This section provides a general description of the NTS front panel features Two front panel mounted tricolor LEDs reflect the status of the NTS The system status indicator at the left end of the front panel has two meanings System Status Indicator It Means Solid Red No signal from time source or major alarm fault detected Blinking Green The NTS is fully operational Possible causes and solutions for problems resulting in a solid red LED are discussed in LED System Status Alerts on page 71 The connection active indicator labeled ACT and located to the right of the NET Port s RJ 45 plug indicates the connection speed on the NET Port ACT Indicator Network Connection Speed Solid Yellow 10Base T Solid Green Up to 100Base T NET Port Serial I O Port Optional Display Rack Mount Handle System Connection Active Status ACT Indicator Indi
68. entication Protocol MDS is a security protocol that can be used to authenticate NTP client server communications ensuring that a received NTP time packet is free from tampering For example if the server receives an NTP request packet with the wrong MDS key i e a key that hasn t been configured by the user in the NTS then the server ignores the request A similar mechanism exists on the client side If the client makes a request with a specific key and the response does not have the same key then the client assumes the packet can not be trusted and discards it Symmetricom s version of MD5 is compatible with all versions of NTP client software furnished by Dr David Mills at the University of Delaware MD5 was drafted into a standard by MIT Laboratory for Computer Science and RSA Data Security Inc MD5 authentication means the information within the NTP packet is guaranteed to be unaltered and from a user having privileged access Unlike other cryptographic ciphers MD5 does not hide the data within the packet The MD5 authenticated NTP packet is still readable This means MDS is faster to generate than other cryptographic protocols and as Dr Mills notes there is no reason to hide the actual time from anyone Further MD5 does not suffer from any export restrictions You could think of MD5 as a very sophisticated NTP data checksum that is calculated over the data socket address and a private key of an NTP time packet It is extremely d
69. equires a 12 V antenna and may severely damage any antenna that does not support 12 V For non standard antenna types contact Symmetricom for assistance NTS 150Ch1 fm Rev G NTS 150 User s Manual 3 Chapter 1 General Information Environmental Specifications Operating Temperature NTS Module Environmental Specifications The environmental specifications of the NTS are 0 to 50 C 32 to 122 F Standard and Window Antenna 40 to 70 C 40 to 158 F Maximum Rate of Change Storage Temperature NTS Module 8 C per hour 50 to 85 C 40 to 185 F Standard Antenna 55 to 85 C 67 to 185 F Maximum Rate of Change Operating Humidity NTS Module 15 C per hour 0 up to 95 non condensing Standard Antenna Storage Humidity NTS Module 100 condensing 0 up to 95 non condensing Standard Antenna Shock amp Vibration Requirements In Shipping Container Operating Altitude NTS Module Maximum 4 km Storage Altitude NTS Module Maximum 12 km 100 condensing Per ISTA Procedure 2A Bench Handling without Shipping Container Per EN60068 2 31 NTS 150 User s Manual NTS 150Ch1 fm Rev G Power Input Specifications Chapter 1 General Information 1 8 Power Input Specifications The power input specifications of the NTS are Power Input AC Mains 100 to 240 VAC 47 440 H
70. er Up NTS 150 w Optional Display NTS 150D Only During NTP stabilization the display reads Initializing NTP Satellites Tracked X where X the number of the next satellite the NTS acquires Once stabilized NTP displays UTC time and the current date on the front panel display in the following default format UTC DDD HH MM SS ddd lt SP gt mmm lt SP gt nn lt SP gt yyyy where DDD day of year HH hour MM minutes SS seconds ddd day of the week abbreviations are Sun Mon Tue Wed Thurs Fri Sat mmm month abbreviations are Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec nn day of month yyyy year An illustration of the front panel default display appears on the next page Once the NTS has synchronized itself then it is ready to respond to time requests that it receives over the network through supported protocols During interruptions of the synchronization input the NTS estimates the quality of the time it is able to provide to clients and updates the fields of the NTP packet appropriately If the NTS has saved a good current average position and has saved recent UTC leap second information it typically locks to GPS in 3 to 5 minutes and delivers UTC time 16 NTS 150 User s Manual NTS 150Ch1 fm Rev G Chapter 2 Installation and Sta
71. er as its timing reference instead of GPS The trap message group holds the ASCII string data to send whenever an SNMP trap message is transmitted The NTS agent sends SNMP trap messages to SNMP management hosts notifying them of some critical event at the NTS agent The NTS issues three types of trap messages The first type is a cold start trap message indicating when the box boots or re initializes The second type of trap message is issued when the NTS estimated time error has exceeded the minimum time accuracy threshold The third trap message is issued when a packet received by the NTS agent fails SNMP authentication The second feature notifies a network administrator immediately if the time server lost its ability to tell accurate time 90 NTS 150 User s Manual NTS 150Ch1 fm Rev G Symmetricom SNMP Enterprise MIB Appendix D SNMP Simple Network Management Protocol The NTP Enterprise Group furnishes information on the Network Time Protocol This group provides packet information for the number of received rejected and transmitted NTP packets exchanged between the UDP transport and the NTP application layers Packets are rejected when they are malformed or the MD5 encryption authentication failed In addition time quality can be assessed by looking at the current estimated time error and comparing it with the time accuracy threshold Finally all of the NTP control information transmitted by the NTS in an NTP packet is availa
72. es use an easy to use upgrade program provided with the firmware 4 4 15 F100 J Jumper Use F100 J to display the state of jumper JP5 which determines if the unit starts in bootloader mode or normal mode When this jumper is set to position 1 the NTS boots up in bootloader mode When this jumper is set to position 0 the NTS boots up in normal mode This function also displays the security flag bits and disable bits Bootloader mode can be used to reinstate default user names and passwords if they are forgotten or install new software in special cases To display the state of jumper J5 send the following command F100 J lt Enter gt An example NTS response Jumper JP5 0 Security flags 0x00000000 BURN_DISABLE_ BIT 0 UNIT_REMOTE_DISABLE_BIT 0 PASSWORD_SETTING_DISABLE_BIT 0 This example shows the jumper set to position 0 and the disable bits at 0 unlocked JP5 is located near the middle of the printed circuit board beside the two flashing LEDs and the NetARM microprocessor To set the jumper to position 1 bootloader place it over the middle pin and the pin closest to the NetARM microprocessor To set the jumper to position 0 default place it over the middle pin and the pin farthest from the NetARM microprocessor 4 4 16 F100 BH Burn Host Use Burn Host when upgrading software to select the FTP host and the file for transfer To select the FTP host and file for upgrading
73. f the following apply e the satellite is visible and e the satellite s ephemeris and almanac data report the satellite s health as good and e the satellite reports its own health as good Bad means at least one of the following applies e the satellite is not visible or e the satellite s ephemeris and almanac data report the satellite s health as bad or e the satellite reports its own health as bad for example during maintenance periods tracked Tracked means that the NTS is tracking this particular satellite current Current means that the NTS is both tracking this satellite and using the satellite s communication to calculate accurate time an example from the list is prn 3 lt CR gt lt LF gt line terminator 38 NTS 150 User s Manual NTS 150Ch1 fm Rev G Function Commands Chapter 4 Serial or Telnet I O Functions You can see from the sample list below that enabled good and tracked satellites are current That means that the NTS does not use any satellite with questionable communication to calculate time even if that satellite is enabled visible and being tracked The response is a current list an example of which is Sample entry F60 lt Enter gt F60 prn 1 bad enabled sig level 0 00 F60 prn
74. f your last session Ferme Files of type Session fies hi z Cancel NTS 150 User s Manual NTS 150Ch1 fm Rev G Session Timers Chapter 3 Remote Operation 3 3 3 3 1 3 3 2 Session Timers There are timers on Utility Port and Telnet control sessions that terminate them if there is a lack of activity Any action you take during a session automatically resets the timer and it starts all over again The timers and their interactions are described below Utility Port Session Timer The Utility Port Session Timer starts upon receipt of a character from the Utility Port The timer is reset upon receipt of every character If no characters are received for 15 consecutive minutes the session terminates When a Utility Port Session is in progress Telnet cannot execute any commands to the NTS The Utility Port Session must end before full Telnet access is possible Telnet Session Timer The Telnet Session Timer starts upon receipt of a command line from Telnet via the NET Port The timer is reset upon receipt of every command line If no lines are received for 15 consecutive minutes the session terminates Terminating a Telnet session drops the connection to the remote host You can immediately activate a new session by re connecting and logging in again NTS 150Ch1 fm Rev G NTS 150 User s Manual 29 4 1 Serial or Telnet I O Functions Overview and Format Shortly after power up the utility port will be ready
75. fm Rev G Proprietary Notice Chapter 1 General Information 1 5 Proprietary Notice THIS DOCUMENT WHETHER PATENTABLE OR NON PATENTABLE SUBJECT MATTER EMBODIES PROPRIETARY AND CONFIDENTIAL INFORMATION AND IS THE EXCLUSIVE PROPERTY OF SYMMETRICOM INC IT MAY NOT BE REPRODUCED USED OR DISCLOSED TO OTHERS FOR ANY PURPOSE EXCEPT THAT FOR WHICH IT IS PURCHASED OR LOANED 1 6 Physical Specifications The NTS fits in a standard 1U 1 75 inch 4 445 cm high 19 inch 48 26 cm rack mount package see page 9 for mounting instructions and has the following physical specifications Size 1 73 in x 17 00 in x 11 63 in 4 39 cm x 43 18 cm x 29 54 cm NTS Chassis with rails and handles Weight 4 21 Ib max 1 91 kg Standard Antenna Size 2 625 in dia x 1 5 in 6 67 cm dia x 3 81 cm Weight 0 55 Ib 0 250 kg including mounting mast Power Regulated 12 V lt 25 mA Frequency L1 1575 42 MHz Coarse Acquisition C A Code Window Antenna Size 2 10 in dia x 0 9 in 5 33 cm dia x 2 29 cm Weight 4 ounces 0 250 kg Power Regulated 12 V lt 25 mA Frequency L1 1575 42 MHz Coarse Acquisition C A Code Antenna Cable for Standard Antenna Type RG 59 Attenuation at 1575 42 MHz should be no more than 10 5 dB per 100 feet Belden 9104 or equivalent Length 50 ft 15 24 m available in lengths up to 200 ft 60 96 m Weight 1 2 Ib 0 545 kg The NTS 150 r
76. h an outside line or international dialing refixes are separated by a comma from the main phone number acts 5 actsNumberOfCalls OBJECT TYPE S T YNTAX Counter MAX ACCESS read only S D S actsGoodCalls OBJECT TYPE S TATUS current ESCRIPTION Number of times the time server has called the ACTS dial up rvic weather the call was successful or not acts 6 T YNTAX Counter MAX ACCESS read only S D a TATUS current ESCRIPTION Number of times the time server called the ACTS dial up service nd successfully received the time acts 7 actsBadCalls OBJECT TYPE SYNTAX Counter MAX ACCESS read only STATUS current D a O ESCRIPTION Number of times the time server called the ACTS dial up service nd something was not right This variable is the sum total of all ther ACTS failure types acts 8 actsFail edInit OBJECT TYPE SYNTAX Counter MAX ACCESS read only S D ATUS current ESCRIPTION g Time server s internal modem failed to initialize If this is excessive it may indicate a time server hardware failure acts 9 NTS 150Ch1 fm Rev G NTS 150 User s Manual 99 actsNoDialTone OBJECT TYPE SYNTAX Counter MAX ACCESS read only STATUS current DESCRIPTION Time server s internal modem found no di
77. he following are suggested ASCII identifiers StratumCode Meaning 0 DCN DCN routing protocol 0 NIST NIST public modem 0 TSP TSP time protocol 0 DTS Digital Time Service ATOM Atomic clock calibrated VLF VLF radio OMEGA etc callsign Generic radio LORC LORAN C radionavigation GOES GOES UHF environment satellite GPS GPS UHF satellite positioning ACTS ACTS telephone modem dial up IRIG Inter Range Instrumentation Group signal Note for TrueTime time servers only GPS ACTS and IRIG are presently used Further a primary time server s outgoing NTP packet will have its reference identifier field set to ntpSysRefClockIdent ntp 14 SYNTAX DisplayString SIZE 0 255 MAX ACCESS read write STATUS current DESCRIPTION This variabl mulates TrueTime s serial function command strings The same commands issued to the serial port can be sent to this string Use this variable for SNMP sets of functions strings Note setting this variable clears ntpControlOutput to the null string See ntpControlOutput below ntsControl 1 SYNTAX DisplayString SIZE 0 255 MAX ACCESS read only STATUS current DESCRIPTION This variabl mulates TrueTime s serial function command strings The same commands issued to the serial port can be sent to this string This variable holds the output result string from the last setting of the abo
78. hen the unit is reset for any other reason To query Quiet Reset enter gt F100 QR The unit replies Quiet Reset Mode on 0 Quiet Reset 0 Ethernet Recv Inactivity Timeout 1200 SNMP no Traps Sent Period 900 64 NTS 150 User s Manual NTS 150Ch1 fm Rev G Extended Function Commands Chapter 4 Serial or Telnet I O Functions Total Number of Quiet Resets 0 Where Mode on O off 1 on Quiet Reset 0 quiet reset not pending Ethernet Recv Inactivity Timeout SNMP no Traps Sent Period Total Number of Quiet Resets 1 quiet reset about to happen lt value gt the number of seconds without Ethernet packet activity before automatically resetting the unit 1200 seconds 20 minutes is the factory default User selectable value Minimum is 300 seconds 5 minutes The maximum value is 4294967295 lt value gt the number of seconds the unit suppresses SNMP traps after a quiet reset The factory setting is 900 seconds 15 minutes The minimum value is 0 seconds A value of 0 means that SNMP traps will be sent immediately after a quiet reset mode The maximum value is 4294967295 Tallies the number of quiet resets This number accumulates indefinitely and wraps back to 0 Use this number by examining it at a particular time and recording the value seen After some period of time later record this number again The difference between the two periods is the number of quiet reset
79. her reference source e g NTP from the network the unit temporarily switches to distributing UTC over NTP which will most likely introduce a large time jump approximately 13 seconds due to the difference between GPS and UTC If the unit reacquires GPS it will switch back distributing GPS time on NTP Login Logout 4 5 4 5 1 4 5 2 4 5 3 Chapter 4 Serial or Telnet I O Functions Login Logout There are two levels of login operator and guest Operator Login Use the Operator login to run function requests and entries change settings and perform software updates As shipped you can access the Operator level with e User Name operator e Password mercury To maintain security change the Operator password at installation If you are logged in as operator the only serial or Telnet function that you cannot perform is to change the Guest password Guest Login Use the guest login to view function requests As shipped you can access the Guest level with e User Name guest e Password truetime To maintain security change the Guest password at installation If you try to use a function that is not accessible from the guest login you will see a message such as Access denied or Command canceled Logout You can logout using any of the standard logout commands as follows e logout e logoff e exit e quit NTS 150Ch1 fm Rev G NTS 150 User s Manual 67 Chapter 4 Serial or Telnet I
80. ifficult to reverse generate The MD5 cryptographic key identifier and cryptographic message digest are appended to the end of a normal NTP packet and the two pieces of information are referred to together as an MDS signature The key identifier is the first field in the signature and it is a 32 bit integer in the range from 1 to 4294967295 OxFFFFFFFF do not use zero as a key identifier This number specifies an index into a table of many possible MDS keys An MDS key is an ASCII alpha numeric character string that is from 1 to 32 characters in length The key is most secure when all 32 characters are filled with numbers and letters chosen at random The ASCII key string is combined with the NTP packet data and results in a secure message digest NTS 150Ch1 fm Rev G NTS 150 User s Manual 79 Appendix B MD5 Authentication and NTP Broadcast Mode Introduction to MDS5 Authentication Protocol The MDS message digest is 16 bytes in length and it follows the key identifier in the signature A server authenticates the NTP packet from a client by first looking up the key by reference to the key identifier It then generates the MD5 message digest based on the key and the NTP data and compares the resulting message digest to the client packet s MDS message digest If the two compare a NTP reply packet is generated with a new MDS signature If the MD5 message digests do not agree then the NTP client packet is ignored by the Network Time Serve
81. inimize the unknown latencies in timestamping the received and transmitted NTP packets The NTP Packet timestamp accuracy specifications are Received Timestamp Accuracy lt 0 1 ms relative to synchronization source Transmitted Timestamp Accuracy lt 0 1 ms relative to synchronization source Network timing accuracy is limited to 1 10 ms typical At these levels of accuracy the realizable NTP synchronization accuracy of any host is determined by the repeatability of the network and client delays not by the NTS timestamp uncertainty The NTS supports the following protocols Telnet ie coin Sh ea aun ey AE eae Sara Ge aaa RFC 854 DAYTIME ae a eek ais a ee E TEE EA a TEAN RFC 867 available in both TCP and UDP protocols BS TIME e Kor anand r E EA a NEE E RFC 868 available in both TCP and UDP protocol a a N E E E EEE RFC 959 SOM iiano Tee ey eg Aa o e r a a RFC 1155 SNMP ona Sad at Acta Ea aA ETA She AS RFC 1157 MI Brese So arn ge a Uwe nE Oy Roars O RFC 1212 NIB echedrice bieeeduenty dude iebin get a RFC 1213 s NSPE AD ne hic re ata ta tne Bik ah a eect et Mies N A backwards compatible with NTP v 2 RFC 1119 and v 3 RFC 1305 MDI L Gra Se Oe Bad Lah oN eed a E eg oe RFC 1321 SNTP hoeses A E hereon ao ae howe ee RFC 2030 DHGP 5 5 620d oh Sal ka daiwa beh ee Bae Ae el aes RFC 2132 SMI Structure of Management Information The NTS does not implement the authenticator field of the NTP packet as described in App
82. ion provide configuration guidelines For a discussion of using NTP in broadcast mode without MD5 authentication see Appendix B The Broadcast mode adjusts its periodicity according to feedback from its broadcast client The periodicity will typically settle out to about every 2 minutes This activity is not adjustable MDS private keys have to be edited on both the NTP server and the NTP client The private keys are defined in the ntp keys file 52 NTS 150 User s Manual NTS 150Ch1 fm Rev G Extended Function Commands Chapter 4 Serial or Telnet I O Functions The NTP client ntp keys file is identical to the one on the NTP server For the specific keys used by the NTP server the NTP client must have the identical line in its version of the file You ll want to use your own hard to guess key names using random letters The critical lines of the ntp keys file are Id M Value 1 M truetime 2 M xyz123 where and 2 are key identifiers The first column is the key identification number which may range in whole positive numbers from 1 to 65 535 The second column is the type of key which is always set to the letter M when using MDS5 authentication The third column is the private key that is ASCII text from 1 to 32 characters in length For maximum security use a unique combination of 32 letters and numbers for each key identifier For correct configuration do not use zero as a key identifier Zero mean
83. ions 0 0 ee eee 9 Necessary Equipment 0 000 cece teens 10 Antenna Information 0 0 0 0 c cae 11 Voltage Requirement and Signal Levels 00g eee nee 11 Use ofa Splitter 20 2 0 eee 11 Lead In Cable 0 c cette ene 11 GPS Roof Mounted Antenna Installation 600 cee eee 11 GPS Window Mounted Antenna 140 619 Installation 12 Placing the Window Antenna 0 0 cece eee eee 12 Gabl s sees kaea Semen E aceon dob dele deals atau ea A aie Sead as 13 PowerUp ats Ske ett i endian aed R indy ep ata dee ely ead eae Med 15 Satellite Acquisition sisas anik aiuda u yai aina E A a tees 15 NTS 150 w Optional Display NTS 150D Only 00 00005 16 NET Port Network Parameters First Time Configuration 005 18 Verily Functionality lt cesaGek ot nue EErEE REKEN ERA IER USARE TUERA ONE 19 Wrap Up amp Advanced Operation 0 000 cece tees 19 SymmTime 2003 nananana auauna 19 Remote Operation TENETACCESS nieras an te ne is ee et ee ee ene ts ee ee ee 21 Starting Telnet and Making a Connection 00 0000 cece eee 22 Ending Telnet esseere sanaa sede ia bee E a ewe ee ane ead ee and 23 Sonal ACCOSS ee orae cies aad A Be ek edhe atin viata E bw Boy ogee Wada EE 23 NTS 150Ch1 fm Rev G NTS 150 User s Manual i Serial Line Settings 0 0 ccc teen ees 24 Hyperterminal irssi rreri Meee tae e
84. is reactivated 6 In the NTS Properties dialog box click ASCII Setup The ASCII Setup dialog box appears ASCII Setup 2 x r ASCII Sending a j Line delay fo milliseconds Character delay 0 milliseconds r ASCII Receiving Append line feeds to incoming line ends I Force incoming data to 7 bit ASCII Wrap lines that exceed terminal width carai 7 Place check marks in the following boxes e Send line end with line feeds e Wrap lines that exceed terminal width 8 Click OK This returns you to the NTS Properties dialog box 9 Click OK This returns you to your HyperTerminal session window where you can enter F series commands Press the Return key to get a gt prompt NTS 150Ch1 fm Rev G NTS 150 User s Manual 27 28 Chapter 3 Remote Operation Serial Access 10 When exiting HyperTerminal click Yes when prompted to save the current session HyperTerminal x 2 Do you want to save session NTS The next time you launch HyperTerminal from the Start menu you can reconnect to the session you just created Reconnecting to your last HyperTerminal session To reconnect to your last HyperTerminal session 1 From the HyperTerminal window select File gt Open 2 Double click your last session Look in Hyperterminal z Sl cl FQAT amp T Mailht CompuServe ht ad HyperT erminal BBS ht 3 MCI Mail ht HIRT EBS ht LD lt _ The name o
85. l ones You may use all zeros for most LANs as the LAN address instead of all ones This address allows NTP time packets to be received by all hosts on the local LAN including the NTP time client Ask your system administrator what your LAN broadcast address is for your particular network and substitute it for the address in this example 82 NTS 150 User s Manual NTS 150Ch1 fm Rev G NTP Broadcast Mode without Authentication Appendix B MD5 Authentication and NTP Broadcast Mode B 3 2 B 4 Configuration of NTP on the Time Client Authentication status is critical on the time client If MD5 is not used authentication must be off for broadcast mode to work Here is a sample ntp conf file used in the time client plus a sample command line of the NTP program invocation server 192 168 1 49 disable auth This file is stored in the etc directory on the time client or the same directory that ntp conf is stored if your directory is different from the standard NTP default directory The critical line is disable auth e The line disable auth turns off system authentication and tells the system to not use authentication for received NTP time broadcast packets When you invoke the NTP client at the command line use the following options e p to turn on broadcast packet reception e d to turn on debug mode at a sufficient level to verify that broadcast packets are indeed being used ntpd d d d b
86. left the client host Receive Timestamp The receive timestamp is a 64 bit timestamp format representing the time that the request arrived at the service host Transmit Timestamp The transmit timestamp is a 64 bit timestamp format representing the time that the reply left the service host Authenticator This is a 96 bit field containing the authenticator information as described in Appendix C of RFC 1305 This field is not implemented by the NTS 76 NTS 150 User s Manual NTS 150Ch1 fm Rev G SNTP V 3 0 Data Format per RFC 2030 Appendix A Network Time Protocol NTP V 3 0 Data Formats A 2 SNTP V 3 0 Data Format per RFC 2030 When the NTS replies to requests from SNTP clients the packet format is the same as the NTP packet format described above with the following differences Leap Indicator The NTS will set these 2 bits to either 0 normal or 3 unsynchronized only Version Number The NTS will copy this field from the client request packet and return it in this field Reference Timestamp This field is set to the time that the reply left the NTS server host Receive Timestamp This field is set to the time that the reply left the NTS server host Transmit Timestamp This field is set to the time that the reply left the NTS server host Authenticator This field is not used in SNTP NTS 150Ch1 fm Rev G NTS 150 User s Manual 77 B 1 MD5 Authentication and NTP Broadcast Mode Introduction to MD5 Auth
87. lites in previous versions as a valid reference source This enables the NTS to operate effectively with window mounted antennas which have limited visibility when compared to roof mounted antennas Satellite acquisition begins at power up and continues until power down Time to first satellite acquisition depends on many factors The NTS attempts to acquire satellites not knowing which satellites are visible After first satellite acquisition time is acquired from the satellite and the receiver assumes to normal operation This procedure takes approximately 3 to 20 minutes depending upon satellite visibility If the current position is unknown or in error by more than km 0 62 miles acquisition typically requires from 3 to 20 additional minutes to locate current antenna position reacquire satellite almanac and ephemeris data and deliver UTC time However since the NTS is optimized for time functionality accurate position readouts are not available NTP stabilization which allows the unit to output accurate time and which may take 8 10 minutes begins after the NTS acquires the first satellite During this procedure the optional display if available sets the Initializing message then updates the number of satellites which have been newly acquired NTP stabilization usually takes place between acquisition of the 5th and 6th satellites NTS 150Ch1 fm Rev G NTS 150 User s Manual 15 Chapter 2 Installation and Start Up Pow
88. location through the Internet The protocol used for Internet access to an NTS is Telnet a standard Internet communications program with an ASCII character based interface that connects to the NTS through its NET Port Use Telnet just like Procomm or any other serial interface program by entering F series commands to which the NTS responds The Utility Port takes precedence over the Telnet session If the Utility Port is active either Telnet login will fail or if already logged in trying to send any Telnet command generates the response NOTICE Cannot respond to command because Utility Port session has priority Telnet sessions have a 15 minute session timer If there is no activity on the Telnet session the timer automatically terminates the session NTS 150Ch1 fm Rev G NTS 150 User s Manual 21 Chapter 3 Remote Operation Telnet Access 3 1 1 Starting Telnet and Making a Connection The following section only applies to Microsoft Windows users If you are using an operating system other than Windows such as Macintosh or UNIX check with your System Administrator for Telnet application information 1 Press the Start button at the lower left of your screen 2 Click Run and enter Telnet in the Open field The Run dialog box appears Run 2 x Type the name of a program folder or document and Windows will open it for you Open teney z I Runin Separate Memory Space Cancel Browse
89. lt SNMP community settings are chosen to make SNMP immediately usable Symmetricom s SNMP agent recognizes up to five separate SNMP communities These communities are configured through the serial or Telnet interface using the F100 CONFIG command Each community has several configurable parameters that are defined in Table 1 Table D 1 SNMP Community Configurable Parameters Key Word Definition Community The name of this community The name is limited to up to 32 ASCII letters numbers or Name punctuation letters This is the name that a management SNMP PDU packet specifies If the community name of an incoming PDU does not match any of the five NAME community names the packet is ignored and an optional authentication trap message can be generated See traps below An empty string field disables the community name Trusted IP If the Use Trusted IP flag is set to yes then this is the table of IP host addresses that Address this community recognizes as valid SNMP management hosts Even if the community name of an incoming PDU matches this community the source IP address must match IP one of the IP addresses in this table or the packet is ignored and an optional authentication error trap message is issued Setting an IP address to all zeros turns off that IP address entry In addition this table also serves as the list of hosts that SNMP trap messages are sent to regardless of the state of the Use Trusted IP flag R W Access For a par
90. ments 35 Serial Telnet Format 31 List 33 34 Semicolon used as replacement 32 Community 88 Compatibility 37 Configuration 88 Commands F36 or F100 37 NET Port Initial 18 79 Single Entry F100 47 Using Serial Telnet Commands 47 NTP 57 Using FTP 51 55 SNMP Using FTP 54 Connection 2 10 21 22 24 29 42 Connector 2 8 10 13 23 Conventions 1 Current Satellite 38 D Data Packet NTP 74 Data Rates 8 24 Datagram 85 Date 2 DAYTIME Protocol 6 86 Default Gateway F100 G 45 Delay 74 75 DHCP 6 8 72 Command F100 DHCP 43 Index Disable Remote Lockout F100 UNLOCk 56 Display 16 Default 16 Power Up Sequence 16 display 15 Distance 74 Down Converter 11 DTR 23 E Enabled Satellite 38 Enterprise MIB 19 87 90 Environmental Specifications 4 Error Messages 69 Ethernet 2 8 10 21 43 10Base T 100Base T 42 Ethernet Address F100 EA 44 F F03 36 F100 47 F100 BASET 42 F100 BF 59 F100 BH 57 F100 BL 60 F100 BLR 67 F100 BLS 67 F100 BU 58 F100 BUB 58 F100 CONFIG 49 F100 DHCP 43 F100 EA 44 F100 G 45 F100 IC 46 F100 IP 44 F100 J 57 F100 KILL 60 F100 L 56 F100 LOCK 56 F100 P 46 F100 PI 64 F100 PL 63 F100 PLR 63 F100 PLS 63 F100 PN 62 F100 PR 62 F100 PRESETALL 67 F100 PT 64 F100 QR Quiet Reset 64 F100 SM 45 F100 ST 47 F100 UNLOCK 56 F100 VER 48 F18 36 F36 37 Index 104 NTS 150 User s Manual NTS 150Ch1 fm Rev G Index F53 37 F60 38
91. n sio MLO wee voc POS GND THAH SLO BLO Figure 2 4 NTS Back Panel Cabling Illustration 48 VDC For the 48 VDC model connect the rear panel chassis ground to your system ground the positive connection from the power supply to the of the rear panel terminal strip and the negative connection from the power supply to the of the rear panel terminal strip EP TRUET IME wre NET Port 4 Serial Port 5 Figure 2 5 NTS Front Panel Cabling Illustration NTS 150Ch1 fm Rev G NTS 150 User s Manual 13 Chapter 2 Installation and Start Up Table 2 1 NTS Cabling Chart Cabling Connection Cable Name Required Connect Point Label Steps Optional Type 1 Sync In Required 12 V GPS ANTENNA Be sure your Antenna antenna supports 12V 2 Chassis Required Ground screw Ground ijr 3 Power Required Power socket 100 240 V 1 A 50 60 Hz or Stop cabling at this point enter network parameters as per Section NET Port Network Parameters First Time Configuration on page 18 then resume cabling with Step 4 Any changes to the network settings take effect after the unit is rebooted For the NTS 150 to automatically negotiate the highest connection speed it needs to be connected to the network when booting If the NTS 150 is connected after booting it will use a slower fall back connection speed 36 60 VDC POS GND NET Interface Serial Interface Required Required
92. n the same fixed font with a bold typeface It represents the necessary keyboard action differently however as per the manual conventions page 1 For example F03 lt Enter gt The number of separators between fields may vary You can enter numeric values with or without leading zeros When entering positive quantities you can omit the plus sign String fields such as on or off may be entered in upper or lower case as can the F that starts all serial or Telnet commands Some fields of some commands are optional and may be replaced by a semicolon In that case the corresponding value is unchanged End all input strings by pressing the lt Enter gt or lt Return gt key on your keyboard An incorrect entry may result in an error message as described in Error Messages on page 69 The NTS responds to correct entries with OK lt CR gt lt LF gt In addition to the regular F series commands there is also a set of F100 commands known collectively as Extended Function Commands With certain F100 commands you can reconfigure network parameters such as IP Address or modify function settings like Remote Lockout These commands include F100 BASET IP SM G CONFIG set commands DHCP and LOCK Changes to any of these settings except F100 LOCK cause the NTS to reset automatically After making changes to values in any of these parameters functions a confirmation prompt appears Are you sure
93. ng F100 P 46 UTC 5 16 36 Time 15 85 86 Default Format 16 Utility Port 21 23 24 33 71 Session Timer 29 W Warranty 2 Web Interface 2 Windows 24 Z get Command SNMP F100 CONFIG 49 set Command SNMP F100 CONFIG 49 Index 110 NTS 150 User s Manual NTS 150Ch1 fm Rev G
94. ng discussion covers the use of an NTP broadcast timeserver with an NTP broadcast time client for NTP version 4 without authentication NTS 150Ch1 fm Rev G NTS 150 User s Manual 81 Appendix B MD5 Authentication and NTP Broadcast Mode NTP Broadcast Mode without Authentication B 3 B 3 1 NTP Broadcast Mode without Authentication Authentication was configured off by default for NTP version 3 but is configured on by default for version 4 This means that NTP version 4 must use authentication like MDS for broadcast time to work To have it otherwise you must specifically turn authentication off in the ntp conf file of the NTP time client The method outlined below should only be used when the LAN that the NTP hosts are on is a secure network Otherwise it is all too easy for an NTP time imposter to broadcast the incorrect time to the NTP time client Configuration of NTP on the Timeserver For the NTP timeserver authentication may be on or off it does not matter As an example here is a sample ntp conf file broadcast 192 168 1 255 This file is stored on the Symmetricom timeserver in its Flash disk drive in the etc directory The critical line is broadcast 192 168 1 255 e This line turns on the periodic broadcast of NTP time packets to the local LAN This IP address the first three octets 192 168 1 is a network address The LAN portion of the address the last octet in this case is set to al
95. ng mast should be 2 inch 5 08 cm water pipe or conduit The mast must be rigid and able to withstand high winds without flexing Guy wires may be used to stabilize a mast longer than 10 ft 3 048 m Sa ii Antenna Multipath interference is caused by reflected signals that arrive at the antenna out of phase with the direct signal Reflective interference is most pronounced at low elevation angles from 10 to 20 degrees above the horizon You may extend mast height to prevent multipath interference The antenna should be at least 3 28 ft 1 0 m from a reflecting surface The figure at the right shows the recommended mounting of the antenna to the mast lt a Mast Figure 2 2 Mast Mounting Illustration NTS 150Ch1 fm Rev G NTS 150 User s Manual 11 Chapter 2 Installation and Start Up Site Preparation 2 1 5 GPS Window Mounted Antenna 140 619 Installation The GPS Window Mounted Antenna is intended for use with products featuring single satellite timing available with firmware version 8 and above Customers with units running earlier firmware versions should upgrade to the current version Information on upgrading is available at http www ntp systems com Window mounted antennas have a restricted view of the sky yielding intermittent satellite coverage With single satellite timing a network time server can synchronize with individual GPS satellites as they pass through the antenna s field of view
96. ngle entry by sending the F100 command and entering new values You will have to respond within 10 seconds to separate confirmation prompts for each value that you change e Leading zeros may be omitted when entering IP Address Subnet Mask and Default Gateway e Any field may be omitted and order is not significant e Blanks are allowed on either side of a colon The NTS reboots after any network parameter is changed NTS 150Ch1 fm Rev G NTS 150 User s Manual 41 Chapter 4 Serial or Telnet I O Functions Extended Function Commands 4 4 1 F100 BASET 100 BASE T 10 BASE T Control Use the BASET command to query the current Base T setting If you set the NTS to 10Base T it operates only at that speed If you set the NTS to 100Base T it negotiates between 10 100Base T This does not necessarily mean the NTS will connect at 100Base T but will connect at the fastest possible speed Any change to the current Base T setting causes the NTS to reset To query the maximum Base T speed send the following command F100 lt SP gt BASET lt Enter gt where F ASCII character F 100 NTS function number lt SP gt space BASET specify Base T command lt Enter gt input line terminator An example of the response is F100 BASET 100T To set the maximum connection speed to 100Base T send the following command F100 lt SP gt BASET lt SP gt 100 lt Enter gt where 100 set maximum Base T speed to 100 To
97. nse including no response results in the NTS canceling the command NTS example execution Default user name and password set 2 F100 PL Password Lock Request Use Password Lock to view the password changing lockout setting for Telnet sessions To display the password lockout state send the following command F100 PL lt Enter gt An example NTS response PASSWORD_SETTING_DISABLE_BIT 0 If the lock is set to 1 changing the password is not possible the password lock is set If the lock is set to 0 changing the password is possible the password lock has been reset F100 PLS Password Lock Set Use Password Lock Set to lockout setting of passwords via Telnet To inhibit password changes send the following command F100 PLS lt Enter gt The NTS responds Are you sure y N If you answer y and press Enter the NTS executes the command As a Safety feature after sending this command you have 10 seconds to respond affirmatively enter the letter y to the confirmation prompt after which the NTS executes the command and resets Within that 10 second time period any other response including no response results in the NTS canceling the command NTS example execution PASSWORD_SETTING_DISABLE_BIT 1 F100 PLR Password Lock Reset Use Password Lock Reset to allow setting of passwords via Telnet To allow password changes send the following command F100 PLR lt Enter gt The NTS respond
98. nual NTS 150Ch1 fm Rev G Extended Function Commands 4 4 22 4 4 23 4 4 24 Chapter 4 Serial or Telnet I O Functions If the lock is set to 1 upgrading is not possible the burn host lock has been set If the lock is set to 0 upgrading is possible the burn host lock has been reset This only effects Telnet connections you can always burn from a serial connection F100 BLS Burn Host Lock Set Use Burn Host Lock Set to prevent unauthorized upgrading of software via Telnet To set the burn host lock send the following command F100 BLS lt Enter gt The NTS responds Are you sure y N If you answer y and press Enter the NTS executes the command As a Safety feature after sending this command you have 10 seconds to respond affirmatively enter the letter y to the confirmation prompt after which the NTS executes the command and resets Within that 10 second time period any other response including no response results in the NTS canceling the command NTS example execution BURN_DISABLE_BIT 1 F100 BLR Burn Host Lock Reset Use Burn Host Lock Reset to reset the lock and allow software upgrades via Telnet You must use the serial port to access this function To reset the burn host lock send the following command F100 BLR lt Enter gt The NTS responds Are you sure y N If you answer y and press Enter the NTS executes the command As a Safety feature after sending this command y
99. ock Reset change requires confirmation within 10 seconds FIOOKILL Reboot F100 PN Password System User Name Change XXXXXXX F100 PR Password Reset change requires confirmation within 10 seconds F100 Password Reset All change requires confirmation within 10 seconds PRESETALL F100 PL Password Lock Request F100 PLS Password Lock Set change requires confirmation within 10 seconds F100 PLR Password Lock Reset change requires confirmation within 10 seconds F100 PI Ping Request IP Address F100 PT Time Request 34 NTS 150 User s Manual NTS 150Ch1 fm Rev G Command List Chapter 4 Serial or Telnet I O Functions Function commands and NTS responses contain common elements which are defined in the following table Table 4 3 Definitions of Common Elements in Serial Commands and Responses Element Definition lt CR gt lt LF gt Line terminator a carriage return 0x0D and line feed Ox0A lt SP gt One or more separator characters either space 0x20 comma Ox2C or tab 0x09 Either no character Ox2B or Ox2D lt HH gt Two digit hour 0 23 lt MM gt Two digit minutes 0 59 lt SS gt Two digit seconds 0 59 lt yyyy gt Four Digit Year 0 9999 lt dd gt Two Digit Day of month 1 31 lt DDD gt Three Digit Day of Year 1 366 lt mm gt Two Digit Month 1 12 lt SOH gt ASCII Start of Header character HEX 01 lt mmm gt Three Digit milliseconds NT
100. ou have 10 seconds to respond affirmatively enter the letter y to the confirmation prompt after which the NTS executes the command and resets Within that 10 second time period any other response including no response results in the NTS canceling the command NTS example execution BURN_DISABLE_BIT 0 F100 PRESETALL Password Reset All Use Password Reset All when you want to set passwords back to the factory defaults PRESETALL is a case sensitive command When entering this command use capital letters To reset all the passwords to factory defaults send the following command NTS 150Ch1 fm Rev G NTS 150 User s Manual 61 Chapter 4 Serial or Telnet I O Functions Extended Function Commands F100 PRESETALL lt Enter gt The NTS responds Are you sure y N 66 99 If you answer y and press Enter the NTS executes the command As a Safety feature after sending this command you have 10 seconds to respond affirmatively enter the letter y to the confirmation prompt after which the NTS executes the command and resets Within that 10 second time period any other response including no response results in the NTS canceling the command NTS example execution Flash memory writing in progress Default user name and password set 2 Default user name and password set 1 4 4 25 F100 PN Password System User Name Change Use Password System User Name when changing the login user name
101. pears in all copies and that both the copyright notice and this permission notice appear in supporting documentation and that the name University of Delaware not be used in advertising or publicity pertaining to distribution of the software without specific written prior permission The University of Delaware makes no representations about the suitability this software for any purpose It is provided as is without express or implied warranty Contents General Information CONVENTIONS iarasi gaa e a a ied Pe ea se dd eee ie 1 Overview of the NTS 00 ete 2 Limited Wananty ergs bate en eee age ee es SR ee adn Sanaa ne vac 2 Limitation Of Liability 2 2 0 0 cette ee 2 Proprietary Notice 2 20000 rsr earann E pe ene did Eadie ee aa 3 Physical Specifications 0 0 0 0 tenes 3 Environmental Specifications 000 ccc tae 4 Power Input Specifications 0 0 0 0 teeta 5 Certifications a iien a clade hee ide biebe hdd hina de E ides 5 Internal Timing Performance Specifications 000 ce eee 5 Network Time Protocol Synchronization Specifications 0200e eee 6 Front Panel Features v cc i vasa cep ke nae ee ee Ree Pee Ree ed 7 Interface Specifications usuau nannaa 8 NET Port Ethernet Interface ec i screeds bes ae wee Kb eG a ened Pees RRS 8 Utility RS 232 I O Interface 0 cee 8 Installation and Start Up Site Preparation 2 0 0 0 teens 9 Mounting Instruct
102. r To use NTP Broadcast mode you also need the following information e Maximum number of user definable MDS keys in the ntp keys file 24 e Maximum number of trusted keys that can be defined in an ntp conf file 20 e Maximum number of keys that can be used in NTP broadcast mode 20 e Maximum text length of MDS key value in ntp keys file 32 ASCII characters For more technical information on MDS see the MD5 RFC 1321 NTP RFC 1305 and the release notes for NTP client software furnished by Dr David Mills web site located at the University of Delaware at http www eecis udel edu ntp or http www eecis udel edu ntp software html All RFCs are published with approval of the Internet Activities Board found on the Internet by r any search engine and typing RFC in the search field or RFC if you have the number 80 NTS 150 User s Manual NTS 150Ch1 fm Rev G NTP Broadcast Mode with MDS Authentication Appendix B MD5 Authentication and NTP Broadcast Mode B 2 NTP Broadcast Mode with MD5 Authentication An NTP broadcast timeserver with an NTP broadcast time client can be used for NTP version 4 with authentication The MD5 authentication protocol is optionally available for NTP versions 3 and 4 When a packet is received by NTP it checks the key identification number in the packet against the private key in the ntp keys file then calculates the MD5 digest number and compares this num
103. rt Up Window Antenna Satellite Tracking Firmware version 8 and above enable the NTS 150 NTS 200 and TimeVault to operate with window mounted GPS antennas Because window mounted antennas have a restricted view of the sky they receive fewer GPS satellite signals than roof mounted antennas In some situations a window mounted antenna may provide only one intermittent GPS signal to lock onto as individual GPS satellites pass through its field of view Firmware version 8 enables network time servers to use GPS as a reference source when intermittent GPS satellite signals are available Note It is critical that NTS 150 NTS 200 and TimeVault units running earlier firmware should upgrade to the current version www truetime net downloads html Link to upgrade notice Summary of the differences between current and previous firmware versions srini 650 934 0541 V 7 and earlier V 8 and after All products lock onto three or more satellite signals to establish GPS as the reference source Requires continuous lock on three satellite signals to maintain GPS as the reference source Operates with roof mounted antennas The NTS 150 and NTS 200 lock onto one satellite signal to establish GPS as the reference source Note The TimeVault initially requires three to establish GPS reference Requires intermittent fix from three satellite signals several times a day Will hold lock on one satellite signal to maintain GPS as the
104. ry synchronization clock source in seconds with the fraction point between bits 15 and 16 Note that this variable can take on both positive and negative values depending on clock precision and skew Note a primary time server s outgoing NTP packet will have its root delay field set to ntpSysRootDelay 262 4 Ht 12 ntpSysRootDisp OBJECT TYPE SYNTAX Counter NTS 150Ch1 fm Rev G NTS 150 User s Manual 95 Appendix D SNMP Simple Network Management Protocol Symmetricom SNMP Enterprise MIB ntpSysRefClockIdent OBJECT TYPE ntpControlInput OBJECT TYPE ntpControlOutput OBJECT TYPE MAX ACCESS read only STATUS current DESCRIPTION This is a raw 32 bit number representing a signed 32 bit fixed point number indicating the maximum error relative to the primary reference source in seconds with fraction point between bits 15 and 16 Only positive values greater than zero are possible Note a primary time server s outgoing NTP packet will have its root dispersion field set to ntpSysRootDisp fee ntp 13 4 SYNTAX DisplayString SIZE 0 4 MAX ACCESS read only STATUS current DESCRIPTION This is a four byte ASCII string identifying the particular reference clock In the case of stratum 0 unspecified or stratum 1 primary reference this is a four octet left justified zero padded ASCII string While not enumerated as part of the NTP specification t
105. s Are you sure y N NTS 150Ch1 fm Rev G NTS 150 User s Manual 63 Chapter 4 Serial or Telnet I O Functions Extended Function Commands 66 99 If you answer y and press Enter the NTS executes the command As a Safety feature after sending this command you have 10 seconds to respond affirmatively enter the letter y to the confirmation prompt after which the NTS executes the command and resets Within that 10 second time period any other response including no response results in the NTS canceling the command NTS example execution PASSWORD_SETTING_DISABLE_BIT 0 4 4 30 F100 PI PING Use F100 PI to ping a remote host to see if it is reachable To ping a host send the following command F100 PI lt IP Address gt lt Enter gt For example F100 PI 206 254 000 021 lt Enter gt An example NTS response PING Remote Host Reachable 4 4 31 F100 PT Time Use F100 PT to display UTC time in seconds To see UTC time in seconds send the following command F100 PT lt Enter gt An example NTS response UTC 990467862 4 4 32 F100 QR Quiet Reset On very small number of NTS units the network port sometimes locks up and stops receiving TCP IP packets The quiet reset function automatically detects this condition and resets the NTS to clear this condition F100 QR also provides the option to suppress SNMP traps for a user specified period after a quiet reset Note SNMP traps operate normally w
106. s between those two periods of time For those people familiar with SNMP this value acts exactly like the familiar counting variables This parameter is not user selectable but for information purposes only Recommendation leave the F100 QR settings unchanged except to address the network port lockup issue in which case enable F100 To enable F100 QR enter gt f100 qr 1 1200 900 QR Where 1 enables Mode on sets Ethernet Recv Inactivity Timeout to 1200 and sets SNMP no Traps Sent Period to 900 Confirm the changes by entering gt f100 qr Quiet Reset Mode on NTS 150Ch1 fm Rev G NTS 150 User s Manual 65 4 4 33 Quiet Reset 0 Ethernet Recv Inactivity Timeout 1200 SNMP no Traps Sent Period 900 Total Number of Quiet Resets 0 F100 WG Write GPS F100 WG controls the time base the NTS displays and distributes via NTP The default setting is UTC Selecting GPS as the time base removes the current time offset to UTC and any future leap events To see the current value enter F100 WG To turn the GPS time base on enter F100 WG 1 To turn the GPS time base off and return to distributing UTC enter F100 WG 0 This setting is saved in nonvolatile memory and will be used until changed NOTE Using F100 WG causes the unit to distribute non standard GPS based NTP Additionally the F100 WG functionality only exists when the unit is locked to GPS If the unit looses GPS lock and selects anot
107. s change of the GPS status The message is Time synchronization type is now where Can be GPS ACTS or NTP trapMsg 6 F ECT TYP trapMsgCrossCheckAlarm OBJ SYNTAX DisplayString SIZE MAX ACCESS read only STATUS current DESCRIPTION This is an ASCII string sent to UDP trap port the TrueTime tim check peer trap 0 255 sg 7 ntpInPkts OBJECT SYNTAX Counter MAX ACCESS read only STATUS current DESCRIPTION F TYPE layer from the transport layer ntp 1 ntpOutPkts OBJECT TYPE SYNTAX Counter MAX ACCESS read only STATUS current DESCRIPTION layer to t ntp 2 he transport layer ntpInErrors OBJECT TYP SYNTAX Counter MAX ACCESS read only STATUS current DESCRIPTION 162 or user defined server s detects a chan in time synchronization types and the server is not in a system alarm condition Total number of NTP packets delivered to the NIP application Total number of NIP packets passed from the NTP application Total number of NIP packets reject for any reason by NTP NTS 150Ch1 fm Rev G NTS 150 User s Manual Appendix D SNMP Simple Network Management Protocol Symmetricom SNMP Enterprise MIB application layer ie nt a ntpAuthFail OBJECT TYPE SYNTAX Counter MAX ACCESS read only STATUS current DESCRIPTION
108. s free can be used in any windows PC environment Windows 95 98 ME NT 4 Windows 2000 and Windows XP operating systems only and can be downloaded at http www ntp systems com symmtime asp With SymmTime your system clock is correct and accurate because it s automatically synchronized to any NTP Network Time Protocol server accessible from your computer Once it is up and running you can set as many or as few clocks on your computer as you want You can set the display to any size or color you want and at a glance you can see what time it is in Tokyo Sydney Los Angeles Chicago New York Buenos Aires London Moscow Dakar Singapore and Beijing NTS 150Ch1 fm Rev G NTS 150 User s Manual 19 Chapter 2 Installation and Start Up SymmTime 2003 20 NTS 150 User s Manual NTS 150Ch1 fm Rev G 3 1 Remote Operation The NTS 150 is an advanced network time server that provides accurate time over an Ethernet connection to multiple client sites A great strength of the NTS is its remote control capability You can configure parameters through command line input using Telnet from a distant terminal to program the unit over the Internet from anywhere in the world The NTS reports time with extreme accuracy using GPS as a synchronization source Optimization for time functionality means that accurate position readouts are not available Telnet Access The NTS can perform setup and control operations sent from a remote
109. s listed must appear in the NTP keys file Note to ensure maximum security remember to change the keys on a regular basis A maximum of 20 trusted keys can be defined on this line trustedkey 1 2 2 Edit the data in the ntp conf file by adding or renaming servers from this list 3 Edit the data in the ntp keys file see below 4 Return the revised data to the NTS by sending a set command F100 config set ntp host 192 168 1 14 dir temp The NTS responds Are you sure y N 66 99 If you answer y the NTS responds as follows then resets Source file temp ntp conf bytes read 70 Dest File etc ntp conf bytes written 70 Source file temp ntp keys bytes read 70 Dest File etc ntp keys bytes written 70 Configuration files transferred successfully As a Safety feature after sending this command you have 10 seconds to respond affirmatively enter the letter y to the confirmation prompt after which the NTS executes the command and resets Within that 10 second time period any other response including no response results in the NTS canceling the command When sending a set command the last number in the NTS response 70 in this example represents file length Depending on the parameters you configure this number may vary Editing the MD5 keys on the NTP Server NTP keys are needed if you are using NTP in broadcast mode with MD5 authentication This and the following sect
110. s the key identification will not be used Editing the MD5 keys on the NTP Client For NTP client authentication the line trustedkey 1 2 in the ntp conf file is required to enable the private keys 1 and 2 from the ntp keys file The line bclient is required for broadcast time packets to be processed by the NTP client In this case sample information from a client ntp conf file might look like trustedkey 1 2 belient Sample information in a client ntp keys file might look like 1 M truetime 2 M longshot When you invoke the NTP client at the command line use the following options e b to turn on broadcast reception e k etc ntp keys to specify the name and location of the keys file e q or debugging An example command line might look like ntpd d d d b k etc ntp keys After configuring all MD5 keys carry out step 4 in the configuration procedure outlined above NTS 150Ch1 fm Rev G NTS 150 User s Manual 53 Chapter 4 Serial or Telnet I O Functions Configuration of SNMP Parameters Using FTP Extended Function Commands By default SNMP is disabled To use it or to configure any other SNMP parameter using FTP and a text editor follow the steps outlined below During this process the FTP software creates a default configuration file snmp conf in your directory to hold the data you have requested Do not change the name of this file 1 Send a get command S
111. s the spacebar to enter a space Bold Used to show messages prompts menus items in selection lists etc that appear on a computer screen and require action on your part For example Press the Submit Changes button text Used to display output character strings text Used to indicate text you should enter with your keyboard exactly as printed NTS 150Ch1 fm Rev G NTS 150 User s Manual 1 Chapter 1 General Information Overview of the NTS 1 2 1 3 1 4 Overview of the NTS The NTS is a high performance Network Time Protocol NTP server that provides time with extreme accuracy using the Global Positioning System GPS as a synchronization source The NTS provides Internet Protocol IP network time synchronization over Ethernet connected networks via NTP developed by Dr David Mills at the University of Delaware The NTS currently supports versions 2 and higher of the NTP RFC 1305 as well as the Simple Network Time Protocol SNTP RFC 2030 In addition the NTS responds to TIME protocol requests RFC 868 and DAYTIME protocol requests RFC 867 For details about these protocols refer to Appendix A and Appendix C in this manual The main feature of the NTS interface is its ability to perform setup and control operations from a remote location using the Internet or TCP IP LAN see Chapter 3 The protocol used is Telnet An NTS has an RJ 45 Ethernet connector on its NET Port providing NTP and IP access and a
112. send the following command F100 BH lt FTP host IP address gt lt SP gt lt Upgrade file path gt lt file name gt lt Enter gt Use UNIX style forward slashes in path and do not describe the drive for example C in the For example F100 BH 10 1 7 20 Lassen Rel nts150 192 9004v001 BIN The NTS responds Burn host is ready When specifying the path to the FTP server from which to retrieve the firmware the number of characters can t exceed 40 characters for the full path length NTS 150Ch1 fm Rev G NTS 150 User s Manual 57 Chapter 4 Serial or Telnet I O Functions Extended Function Commands This command can be disabled by the Burn Host Lock command which denies Telnet access However if you enter BootLoader mode this command is always available 4 4 17 F100 BU Burn Use Burn when upgrading software to write the file selected with F100 BH to the flash memory Flash memory is checked to ensure that the correct file is used To write the file to the flash send the F100 BH command with the FTP host file path and name and then send the following command F100 BU lt Enter gt The NTS responds Are you sure y N 66 99 If you answer y and press Enter the NTS executes the command As a Safety feature after sending this command you have 10 seconds to respond affirmatively enter the letter y to the confirmation prompt after which the NTS executes the command and resets Within
113. ser s Manual NTS 150Ch1 fm Rev G Extended Function Commands Chapter 4 Serial or Telnet I O Functions 4 4 Extended Function Commands The F100 command series is known collectively as Extended Function Commands With certain F100 commands you can reconfigure network parameters such as IP Address or modify function settings like Remote Lockout The main commands include F100 BASET IP SM G CONFIG set commands DHCP LOCK UNLOCK and L Changes to any of these settings except F100 LOCK cause the NTS to reset automatically after you respond to a confirmation prompt Other commands are available for changing passwords PN PR PRESETALL PL PLS PLR and updating software J BH BU BUB BF BL BLS BLR as well as pinging remote hosts PI and displaying UTC time in seconds PT For safety the default response to the confirmation prompt is negative The NTS will not execute the command unless you respond affirmatively enter the letter y within 10 seconds Within that time period any other response including no response results in the NTS canceling the command In those sections below where it is not already stated lt Enter gt input line terminator and lt CR gt lt LF gt output line terminator F100 Command Configuration Notes e Network parameters can be queried at any time but cannot be changed unless DHCP is disabled first e You can reconfigure two or more network parameters in a si
114. t Sample entry F100 G 206 54 0 17 lt Enter gt The response is Are you sure y N lt CR gt lt LF gt As a Safety feature after sending this command you have 10 seconds to respond affirmatively enter the letter y to the confirmation prompt after which the NTS executes the command and resets Within that 10 second time period any other response including no response results in the NTS canceling the command NTS 150Ch1 fm Rev G NTS 150 User s Manual 45 Chapter 4 Serial or Telnet I O Functions Extended Function Commands 4 4 7 F100 IC NET Port Network Configuration Entry Request To review the entire NET Port network configuration send the following command F100 lt SP gt IC lt Enter gt An example of the response is F100 IP 206 54 0 21 SM 255 255 255 240 G 206 54 0 17N E lt CR gt lt LF gt where N E denotes Ethernet DIX 4 4 8 F100 P Change User Password If you want to change a password you must log in as the user for whom you want to change the password also see page 67 The maximum password size is ten characters To change the user password send the following command F100 lt SP gt P lt Enter gt where F ASCII character F 100 NTS function number lt SP gt space P specify Password command lt Enter gt input line terminator The NTS responds Enter new user password When you enter a new password the NTS responds with Enter it again Enter the
115. t lt ACTION gt lt SP gt lt TYPE gt lt SP gt HOST lt IPADDRESS gt lt SP gt DIR lt DIRECTORY gt lt Enter gt where F ASCII character F 100 NTS function number lt SP gt space CONFIG specifies configuration command lt ACTION gt specifies the action to be taken either GET to retrieve data from the NTS or SET to send the modified data back to the NTS lt TYPE gt specifies the type of file to be used NTP or SNMP lt HOST IPADDRESS gt your IP Address the FTP host DIR lt DIRECTORY gt the directory on your C drive where you want the data to reside lt Enter gt input line terminator NTS 150Ch1 fm Rev G NTS 150 User s Manual 49 Chapter 4 Serial or Telnet I O Functions Extended Function Commands Use a get command to retrieve data from the NTS and have it delivered through the FTP software to a specified directory on your C drive You must use the UNIX format with forward slashes to specify your IP address and the target directory The FTP software delivers the data in a configuration file Once this file is in the directory use any text editor to modify it In a get command line you can enter the elements ntp snmp and get in any order If you want to configure both NTP and SNMP at the same time place both elements in the command line Use a set command to transfer the modified data from the configuration file in your directory back to the NTS Once again
116. t session F100 UNLOCK Disable Remote Lockout Use Disable Remote Lockout to enable remote control capability via Telnet You must send this command via the serial port To unlock the NTS to allow remote access send the following command F100 UNLOCK lt Enter gt The NTS responds Are you sure y N If you answer y and press Enter the NTS executes the command As a Safety feature after sending this command you have 10 seconds to respond affirmatively enter the letter y to the confirmation prompt after which the NTS executes the command and resets Within that 10 second time period any other response including no response results in the NTS canceling the command F100 L Lock Display Request Use Lock Display to view the lock setting state for remote Telnet access To view the lock setting for remote access send the following command F100 L lt Enter gt An example NTS response UNIT_REMOTE_DISABLE_BIT 0 This example shows that the unit is unlocked 0 so remote access is allowed 56 NTS 150 User s Manual NTS 150Ch1 fm Rev G Extended Function Commands Chapter 4 Serial or Telnet I O Functions Important Note The following commands related to software upgrades F100 J BH BU BUB BF and K I L L are not the normal commands used for uploading firmware Symmetricom provides these commands for flexibility in supporting special case situations Normal firmware upgrad
117. t to UDP port 162 or user defined when the TrueTime time server determines the SNMP authentication for a SNMP PDU is in correct The message is SNMP Authentication Failure Trap PDU from H Where 44 44 4 is the doted decimal notation of the IP address of the unit attempting the invalid access trapMsg 3 92 NTS 150 User s Manual NTS 150Ch1 fm Rev G Symmetricom SNMP Enterprise MIB G trapMsgGpsAntennaFault OBJ ECT TYP Appendix D SNMP Simple Network Management Protocol SYNTAX DisplayString SIZE 0 255 MAX ACCESS read only STATUS current DESCRIPTION This is an ASCII string sent to UDP trap port 162 or user defined when the TrueTime time server s GPS detects change in the antenna status The status can be OK or FAULT trapMsg 4 G ECT TYP trapMsgGpsUnlocked OBJ SYNTAX DisplayString SIZE 0 255 MAX ACCESS read only STATUS current DESCRIPTION This is an ASCII string sent to UDP trap port 162 or user defined when the TrueTime time server s GPS detects change of the GPS status The status can be is unlocked trapMsg 5 trapMsgNewSyncType OBJECT TYPE SYNTAX DisplayString SIZE 0 255 MAX ACCESS read only STATUS current DESCRIPTION This is an ASCII string sent to UDP trap port 162 or user defined when the TrueTi time server s GPS detect
118. tal letters You also must put spaces between each letter To reboot the unit send the following command F100 K lt SP gt I lt SP gt L lt SP gt L lt Enter gt The NTS responds Are you sure y N If you answer y and press Enter the NTS executes the command As a Safety feature after sending this command you have 10 seconds to respond affirmatively enter the letter y to the confirmation prompt after which the NTS executes the command and resets Within that 10 second time period any other response including no response results in the NTS canceling the command When using F100 K I L L via the Serial Port pressing Y then Enter will begin the reboot which will be logged on the terminal as shown below NTS example execution Serial Port System Power On Self Test Results Serial Loopback Test Passed Initialization Successfully Completed Press Enter then you can log in again When using F100 K I L L via Telnet pressing Y then Enter will begin the reboot but will disconnect the Telnet session Nothing will show on the terminal and pressing Enter again will close the screen if it hasn t closed automatically already F100 BL Burn Host Lock Request Use Burn Host Lock to display whether or not software upgrades via Telnet can be performed To display the burn host lock state send the following command F100 BL lt Enter gt An example NTS response BURN_DISABLE_BIT 0 60 NTS 150 User s Ma
119. ter gt where F ASCII character F 100 NTS function number lt SP gt space VER specify Version Request command lt Enter gt input line terminator An example of the response is gt f100 ver 100 VER BOOTLOADER 182 9023v008 SOFTWARE 182 9024v008 FILE SYSTEM 182 9005v008 NVRAM VER 2 48 NTS 150 User s Manual NTS 150Ch1 fm Rev G Extended Function Commands Chapter 4 Serial or Telnet I O Functions 4 4 11 F100 CONFIG FTP Configuration of NTP amp SNMP Change the NTP and SNMP parameters contained in the temp directory through FTP and a text editor For more information about NTP and NTP broadcast mode see page 73 and page 79 For details on SNMP see page 87 Installing and Using FTP Software If you choose the F100 CONFIG option you need an FTP server which is any server that supports Anonymous FTP If you do not have an FTP server available you can turn your own Windows workstation into an FTP server by running any ftp daemon software that is available on the Web Follow the instructions that come with your ftp daemon software to set it up The software needs to allow anonymous login and allow uploads Once the software is set up you can login to the NTS through a serial Telnet interface To configure NTP and SNMP parameters use get and set commands Both these commands have the same general format F100 lt SP gt CONF IG lt SP g
120. that 10 second time period any other response including no response results in the NTS canceling the command NTS example execution Burning Progl Burning file 182 9004v001 bin with size 688052 to partition 1 sector 6 Sec 6 re 0Q Sec 7 re 0 Sec 8 re 0 Sec 9 re 0 Sec 10 re 0 Sec 11 re 0 Sec 12 re 0 Sec 13 re 0 Sec 14 re 0 Sec 15 re 0 Sec 16 re 0 Flash successfully programmed CRC32 0x88841B88 4 4 18 F100 BUB Burn BootLoader Use Burn BootLoader when upgrading software to write the BootLoader to flash memory To write the BootLoader to the flash send the F100 BH command with the FTP host file path and name and then send the following command F100 BUB lt Enter gt The NTS responds Are you sure y N 58 NTS 150 User s Manual NTS 150Ch1 fm Rev G Extended Function Commands Chapter 4 Serial or Telnet I O Functions 66 99 If you answer y and press Enter the NTS executes the command As a Safety feature after sending this command you have 10 seconds to respond affirmatively enter the letter y to the confirmation prompt after which the NTS executes the command and resets Within that 10 second time period any other response including no response results in the NTS canceling the command NTS example execution Burning Boot Burning file 182 9003v001 BT with size 342860 to partition 0 sector 0 Sec 0 re 0 Sec 1 re 0 Sec
121. ticular community the SNMP variables are set to read only or normal SNMP access This allows the manager to have a public known community from which ACCESS anyone may read the SNMP data base and a separate private community that has full normal read and write access to the SNMP database Note SNMP MIB II does not define all variables to be writeable SNMP variables defined by RFC 1213 as read only remain read only regardless of the state of this R W Access flag Trap Enable When this flag is set to yes trap messages are issued for this community TRAP Note This enables disables all traps both coldstart and authentication 88 NTS 150 User s Manual NTS 150Ch1 fm Rev G SNMP Configuration Appendix D SNMP Simple Network Management Protocol Table 2 and Table 3 define SNMP configurable parameters that are applied globally to all SNMP communities this menu appears after the last community menu and the Symmetricom SNMP factory default settings Table D 2 SNMP Community Global Parameters KeyWord Definition SNMP Global Enable Traps When set to yes all authentication failure traps are disabled This flag overrides the Trap Enable flag set for each community and directly sets GEN TRAPS the value of the SNMP variable snmpEnableAuthenTraps 0 Note The state of this flag has no effect on the issue of coldstart trap messages Table D 3 Symmetricom SNMP Default Settings
122. to receive commands You can send data to or request data from the NTS by sending serial or Telnet commands using ASCII character strings The general form of these commands is F lt FUNC gt lt Enter gt where F ASCII character F lt FUNC gt two digit function number lt Enter gt input line terminator More specifically the data input and output formats are F lt FUNC gt lt SP gt lt FIELD gt lt Enter gt input or F lt FUNC gt lt SP gt lt FIELD gt lt CR gt lt LF gt output where F ASCII character F lt FUNC gt function number lt SP gt space lt FIELD gt data entry or request lt CR gt lt LF gt output line terminator encloses a phrase that is repeated as often as necessary Output strings are kept to fixed lengths whenever possible This means that numeric values often contain many leading blanks This user s guide represents output strings in a fixed font For example F60 prn 14 good enabled sig level 21 37 lt CR gt lt LF gt The formats of the output strings are designed so that it is possible to request the state of a function and save the response string Later that string can be sent to the unit to restore the original state of that function NTS 150Ch1 fm Rev G NTS 150 User s Manual 31 Chapter 4 Serial or Telnet I O Functions Overview and Format Input strings sent to the unit may vary in length The manual represents what you should type i
123. tratum level of the local clock Note a primary time server sets outgoing NTP packets stratum field and ntpSysStratum to 1 nto 9 4 ntpSysPoll OBJECT TYPE SYNTAX INTEGER 6 10 MAX ACCESS read only STATUS current DESCRIPTION When the time server is in NTP broadcast mode this is an integer indicating the maximum interval between successive NTP messages in seconds to the nearest power of two For example a value of 6 means 2 6 or 64 seconds Note a primary time server s outgoing NTP packet will have its poll field set to ntpSysPoll Note this field is equal to 0 when not in NTP broadcast mode Note unless this is a time server initiated NIP packet the value of the poll equals the value set in the in coming packet ntp 10 ntpSysPrecision OBJECT TYPE SYNTAX INTEGER 127 127 MAX ACCESS read only STATUS current DESCRIPTION This is an integer indicating the ultimate precision of the synchronizing clock in seconds to the nearest power of two Note a primary time server s outgoing NIP packet will have its precision field set to ntpSysPrecision ntp 11 T ntpSysRootDelay OBJECT TYPE SYNTAX Counter MAX ACCESS read only STATUS current DESCRIPTION This is a raw 32 bit number representing a signed fixed point 32 bit number indicating the total round trip delay to the prima
124. ueTime Enterprise MIB trueTimeEnt 0 trapMsg OBJECT IDENTIFIER trueTimeEnt 1 ntp OBJECT IDENTIFIER trueTimeEnt 2 ntsControl OBJECT IDENTIFIER trueTimeEnt 3 gps OBJECT IDENTIFIER trueTimeEnt 4 acts OBJECT IDENTIFIER trueTimeEnt 5 trapMsgColdStart OBJECT TYPE SYNTAX DisplayString SIZE 0 255 MAX ACCESS STATUS cur DESCRIPTION This is a read only rent n ASCII string sent to UDP port 162 or user defined when the TrueTi PDU from decimal no trap trapMsgNtpAlarm OBJECT TYPE me time server reinitializes The message is Cold Start Trap FEEFEE Ht tHE Where tt Ft ttt FHF Ls the doted tation of the IP address of the booting unit sg l SYNTAX DisplayString SIZE 0 255 MAX ACCESS read only STATUS current DESCRIPTION This is an ASCII string sent to the UDP trap port 162 or user defined when the TrueTim time server s detects change of the NTP status This could be due to a line breakage in the timing source 1l The messa where aaa trap trapMsgSnmpAuthFail OBJECT TYPE oss of GPS satellites etc ge is NTP Status aaaaaaaa aaaaaa can be NTP UNLOCKED NTP client mode or NTP LOCKED sg 2 SYNTAX DisplayString SIZE 0 255 MAX ACCESS read only STATUS current DESCRIPTION This is an ASCII string sen
125. ve ntpControlInput variable Use this variable for SNMP gets of function strings See ntpControlInpuut above ntsControl 2 96 NTS 150 User s Manual NTS 150Ch1 fm Rev G Symmetricom SNMP Enterprise MIB gpsGroupValid OBJECT TYPE gpsNumTrackSats OBJECT TYPE gpsNumCurrentSats OBJECT TYPE gpsSatTrackMode OBJECT TYPE Appendix D SNMP Simple Network Management Protocol SYNTAX INTEGER gpsGroupIsInvalid 0 gpsGroupIsValid 1 MAX ACCESS read only STATUS current DESCRIPTION A test flag indicating if data contained in this SNMP GPS group is valid or not This flag equals 1 when GPS is used as the time synchronization source and 0 for all other sources z gps l SYNTAX INTEGER 0 8 MAX ACCESS read only STATUS current DESCRIPTION The number of GPS satellites tracked gps 2 SYNTAX INTEGER 0 8 MAX ACCESS read only STATUS current DESCRIPTION Current number of GPS satellites used in position and time fix calculations The number of satellites available depends on how long the time server has been up the time of day and the total amount of clear sky as seen from the GPS antenna Because of the high frequency of GPS radio signals GPS antennas must have unobstructed line of sight from the antenna to the satellite to receive data gps 3
126. z base model IEC 320 Connector 48 VDC 36 to 60 VDC optional 4 position Barrier Strip Connection Fuse 1A Slow Blow rear panel Power Requirement lt 20 W maximum 1 9 Certifications FCC CE applies to base model only UL applies to base model only 1 10 Internal Timing Performance Specifications The absolute time and frequency characteristics of the NTS are essentially those of the input synchronization source The relative synchronization characteristics given here reflect the capabilities of the NTS to preserve the time and frequency characteristics of its synchronization source The NTS output signal timing and frequency specification relative to input synchronization source is Internal Timing Accuracy lt 5 us to UTC when synchronized via GPS Following initial synchronization of the NTS to an input synchronization source if that synchronization source is lost and if the ambient temperature of the unit is maintained within 3 C the time maintained in the unit will diverge from the input at the rate of approximately 6 parts in 10 NTS 150Ch1 fm Rev G NTS 150 User s Manual 5 Chapter 1 General Information Network Time Protocol Synchronization Specifications 1 11 Network Time Protocol Synchronization Specifications The NTS hardware is designed specifically to implement the NTP server function As such it was carefully designed to operate with the real time operating system to m

Network Time Server NTS–150 & NTS-150D User`s Manual

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Network Time Server NTS&ndash;150 &amp; NTS-150D User`s Manual

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Network Time Server NTS–150 & NTS-150D User`s Manual