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6000-100AppB.fm Rev. D

TimeVault™ User’s Manual

B-101

NTP Broadcast Mode with MD5 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 number 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 MD5.

Setting up an NTP broadcast server and NTP client using MD5 authentication requires
modifications to the “ntp.keys” file.

Editing MD5 keys is covered in Chapter 4 (see the sections starting on page 4-70). The
following discussion covers the use of an NTP broadcast timeserver with an NTP
broadcast time client for NTP version 4 without authentication.

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Содержание Time Server

Страница 1: ...6000 100 Revision D January 2 2003 TimeVault Trusted Time Server User s Manual TM ...

Страница 2: ...n 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 Symmetricom Symmetricom Inc Microsoft Microsoft Windows HyperTerminal and Procomm MD5 is the trademark or registered trademark of RSA Sec...

Страница 3: ...ar installation If this device does cause harmful interference to radio or television reception the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the computer and receiver Connect the computer into an outlet on a circuit different from that to which the receiver is connected ...

Страница 4: ...2 1995 EN55024 1998 EMC Immunity for ITE Class A EN61000 3 2 1995 Harmonic Current Emissions as amended by A1 1998 A2 1998 EN61000 3 3 1995 Voltage Fluctuation and Flicker Immunity Note The TimeVault is compliant with the supplied standard antenna configuration Model 142 614 XXX If the TimeVault is supplied with a Model 142 6150 Antenna it has its own CE Compliance Certification Initial Certificat...

Страница 5: ...ll 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 of this software for any purpose It is provided as is...

Страница 6: ...etwork configuration for the NET port below for quick reference NET Port Ethernet Address ___________________________________ NET Port IP Address ________________________________________ NET Port Subnet Mask ______________________________________ NET Port Default Gateway ___________________________________ ...

Страница 7: ...6000 100Front fm Rev D TimeVault User s Manual v ...

Страница 8: ... Please list any topics that were hard to find Please list any topics that you couldn t find at all How clearly is the manual organized circle the number that fits not clearly very clearly 1 2 3 4 5 6 Is the manual a useful size for you circle the number that fits much too large just right 1 2 3 4 5 6 Is the font easy to read Big enough Yes No Easy on the eyes Yes No Would you like more educationa...

Страница 9: ...oving this manual Unacceptable Meets Exceeds Expectations Expectations Outstanding General Information including Specs 1 2 3 4 5 6 Installation cabling 1 2 3 4 5 6 Quick Start Guide 1 2 3 4 5 6 Web Telnet Access 1 2 3 4 5 6 Keypad Functions 1 2 3 4 5 6 Serial I O Functions 1 2 3 4 5 6 Error and other Messages 1 2 3 4 5 6 Appendix A NTP 1 2 3 4 5 6 Appendix B MD5 1 2 3 4 5 6 Appendix C Time Daytime...

Страница 10: ...viii TimeVault User s Manual 6000 100Front fm Rev D ...

Страница 11: ...ront Panel Interface 7 Interface Specifications 8 NET Port Ethernet Interface 8 Utility Port RS 232 I O Interface 8 ACTS Port 9 3 Installation and Start Up 11 Site Preparation 11 Mounting Instructions 11 Necessary Equipment 12 Antenna Information 13 GPS Roof Mounted Antenna Installation 13 GPS Window Mounted Antenna 140 619 Installation 14 Cabling 15 Power Up 17 GPS Mode 17 ACTS Mode 19 NTP Mode 1...

Страница 12: ...ession Timer 48 Web Control Session Timer 48 5 Serial or Telnet I O Functions 49 Overview and Format 49 Command List 51 Function Commands 54 F03 Time and Date Request 54 F18 Software Version Request 54 F36 NET Port Network Configuration Entry Request 55 F53 Operating Mode Request 55 F60 Satellite List Request 56 F67 Leap Second Information 58 F72 Fault Status Request 58 Extended Function Commands ...

Страница 13: ...word Reset All 82 F100 PN Password System User Name Change 82 F100 PR Password Reset 83 F100 PL Password Lock Request 83 F100 PLS Password Lock Set 84 F100 PLR Password Lock Reset 84 F100 PE LIST Peer List Request 84 F100 PE ADD Peer Add 85 F100 PE REM Peer Remove 85 F100 PI PING 85 F100 PT Time 85 Login Logout 86 Operator Login 86 Guest Login 86 Logout 86 6 TimeVault Generated Messages 87 Error M...

Страница 14: ... Configuration of NTP on the Time Client 103 C TIME and DAYTIME Protocols 105 TIME Protocol as per RFC 868 105 The Time Protocol Format 105 DAYTIME Protocol as per RFC 867 106 TCP Based Daytime Service 106 UDP Based Daytime Service 106 DAYTIME String Format 106 D SNMP Simple Network Management Protocol 107 About SNMP 107 Symmetricom SNMP Configuration 108 Serial or Telnet Configuration 110 Symmetr...

Страница 15: ... manual are Text Indicates body text Italics Emphasizes important information Key For input referring to keys that are labeled on your keyboard For example Enter means press the Enter key for a line terminator SP means press the spacebar to enter a space KEYPAD PUSH BUTTONS Used to indicate push buttons on the unit Press SAVE Bold Used to show messages prompts menus items in selection lists etc th...

Страница 16: ...n RJ 45 Ethernet connector on its NET Port providing NTP and IP access and a 9 pin D serial connector for serial input output 1 3 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 ...

Страница 17: ... cm Weight 4 21 lb 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 lb 0 250 kg including mounting mast Power Regulated 12 V 25 mA Frequency L1 1575 42 MHz Coarse Acquisition C A Code Optional Down Up Converter If you have this option please refer to the manual for Symmetricom Model 142 6150 Antenna Down Up Converter Antenna Cable for Standard Antenna Type ...

Страница 18: ...orage Temperature TimeVault Module 50 to 85 C 40 to 185 F Antenna 55 to 85 C 67 to 185 F Maximum Rate of Change 15 C per hour Operating Humidity TimeVault Module 0 up to 95 non condensing Antenna 100 condensing Storage Humidity TimeVault Module 0 up to 95 non condensing Antenna 100 condensing Operating Altitude TimeVault Module Maximum 4 km Storage Altitude TimeVault Module Maximum 12 km Shock Vib...

Страница 19: ...tion approximately 125 µs this accuracy exceeds that which the NTP protocol delivers over a network With ACTS synchronization 5 ms In this case the system accuracy is limited to the accuracy of the ACTS input With NTP client mode synchronization the accuracy of the client software is the limiting factor in determining the delivered time accuracy Accuracy of packet delivery time to network jack 0 5...

Страница 20: ...cols RFC 867 TIME available in TCP and UDP protocols RFC 868 FTP RFC 959 SMI RFC 1155 SNMP RFC 1157 MIB RFC 1212 MIB II RFC 1213 NTP ver 4 0 N A backwards compatible with NTP ver 2 RFC 1119 and ver 3 RFC 1305 MD5 RFC 1321 SNTP RFC 2030 HTTP RFC 2068 and 2616 DHCP RFC 2132 SMI Structure of Management Information TimeVault does not implement the authenticator field of the NTP packet as described in ...

Страница 21: ...unted tri color LEDs reflect the status of TimeVault The system status indicator at the left end of the front panel has five different displays Possible causes and solutions for problems resulting in a solid red or solid orange display are discussed in LED System Status Alerts on page 5 89 The connection active indicator labeled ACT and located to the right of the NET Port s RJ 45 plug indicates t...

Страница 22: ...ort RS 232 I O Interface Data Serial functions as listed in Section 4 3 Function Commands on page 4 54 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 The following chart shows pin assignments for the RS 232 connector Table 1 1 RS 232 Interface Pin Assignments Telnet HTTP DHCP SNTP TCP IP SNMP TFTP or FTP NTP and Broad...

Страница 23: ...Specifications Chapter 1 General Information 1 13 3 ACTS Port Data ACTS Service time updates Data Rates 9600 Connector RJ 11 The ACTS modem requires a separate analog phone line See Appendix E Automated Computer Time Service ACTS for more information about ACTS ...

Страница 24: ......

Страница 25: ...Remove and discard the two factory installed flat head Phillips screws from the front end of a TimeVault 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 3 Place 2 flat head Phillips screws from the Rack Mount Kit through the holes in the bracket and into TimeVault 4 Tighten the screws to the foll...

Страница 26: ...is recommended for 100Base T operation A separate analog phone line for the ACTS modem A cable with an RJ 11connector for the ACTS Port A set of network address parameters for the NET Port that delivers NTP time and allows remote control of the unit over the Internet Optionally you can add an RS 232 serial interface for local control using a terminal emulation program This requires A serial interf...

Страница 27: ...ge 2 15 2 1 4 GPS Roof Mounted Antenna Installation When selecting a site for the standard outdoor 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 cancels some of the signal Blocked sig...

Страница 28: ...atellite 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 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 ...

Страница 29: ...is 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 Figure 2 5 TimeVault Front Panel Cabling Illustration Connect the cables in the order listed in Table 2 1 below In order to avoid network addressing conflicts be sure to configure network para...

Страница 30: ...a ANTENNA 2 ACTS Modem Required for fully redundant operation RJ 11 ACTS 3 Chassis Ground Optional Ground screw 4 Power Required Power socket 100 240 V 1 A 50 60 Hz or 36 60 VDC POS GND Stop cabling at this point enter network parameters as per Section 2 5 NET Port Network Parameters First Time Configuration on page 2 28 then resume cabling with Step 5 5 NET Interface Required RJ 45 10Base T 100Ba...

Страница 31: ...eypad or serial Telnet interface Once TimeVault has synchronized itself then it is ready to respond to time requests it receives over the network through supported protocols 2 3 1 GPS Mode Consider the GPS mode operational once TimeVault tracks at least four satellites and receives ephemeris ionospheric and leap seconds data from each The process of satellite acquisition is described below Once Ti...

Страница 32: ... remains locked GPS as a reference source for approximately 5 minutes while it attempts to re acquire another GPS satellite Because the TimeVault is optimized for time functionality accurate position readouts are not available If the current position is unknown or in error by more than 1 km 0 62 miles acquisition typically requires from 3 to 20 additional minutes to locate current antenna position...

Страница 33: ...each server in turn until it receives a valid NTP response Consider the NTP client mode operational once TimeVault receives six valid NTP responses from at least one NTP server from the list This may take 8 10 minutes If the number of current satellite signals drops to 1 or 2 the unit uses GPS as refer ence source for 10 minutes If the number of satellite signals drops to zero the unit keeps GPS a...

Страница 34: ...ault has either not been able to track at least four satellites during the preceding 15 minutes or has tracked at least four satellites but has not received numerically consistent date time for the preceding 15 minutes ACTS TimeVault s ACTS modem has detected dial tone when off hook has successfully reached ACTS and has received time update TimeVault s ACTS modem has not detected dial tone when of...

Страница 35: ...display in the following default format UTC DDD HH MM SS ddd SP mmm SP nn SP 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 page 2 23 ...

Страница 36: ...minutes GPS is still not synchronized ACTS takes over and provides the time until GPS is once more available At this point TimeVault rolls back over to GPS If both GPS and ACTS were to fail TimeVault rolls over to NTP its designated tertiary synchronization source TimeVault uses NTP until either GPS or ACTS is once again available This rolling redundancy sequence is summarized in the following ill...

Страница 37: ...ns Use the keypad for initial system configuration see page 2 28 Table 2 2 Alphanumeric Display Functions The Display Shows During How to Access Status Messages Start Up and Initialization Default Satellite Acquisition Status Start Up and Initialization Default Configuration Information Parameter and User ID Password Set Up Use the Directional Key Pad Push Buttons Current UTC Date and Time in real...

Страница 38: ...t ignores any data entry attempts prior to this When entering parameter values position the horizontal cursor under the digit you want to change using the and directional push buttons Use the and push buttons to increase or decrease the value When entering function settings DHCP and Remote Control the directional push buttons act like toggle switches Press SAVE to store any entries you make and pr...

Страница 39: ...display 1 IP Address An example of the display is 2 Subnet Mask An example of the display is 3 Default Gateway An example of the display is 4 DHCP An example of the display is 5 Remote Control An example of the display is 6 Display Security An example of the display is The values illustrated below are examples only If you are ready to configure TimeVault for the first time go now to Section 2 5 NE...

Страница 40: ... view the current security setting scroll through the parameter list using the SET UP push button until Display Security appears To enable Display Security press any directional push button The security setting changes from OFF to ON You can now enter your user ID and password as per the procedure described below Enter user IDs and passwords with the front panel directional push buttons as follows...

Страница 41: ...ystem parameters For a quick review or to modify parameters remotely use the TimeVault web interface or a serial connection Further Precautions After 10 minutes without any front panel push button activity TimeVault automatically times out the security feature You must re enter user ID and password to review or modify system parameters through the front panel alphanumeric display However under cir...

Страница 42: ...ugh the front panel keypad Optionally you could use the serial port referred to in this manual as the Utility Port through a serial device connected at 9600 8N1 Subsequently you can edit parameter values and function settings through the keypad the web interface the Utility Port or using Telnet see Section 4 4 Extended Function Commands on page 4 59 To set the NET Port network parameter values and...

Страница 43: ...DHCP server and then will be available on the network 6 Press the SETUP button to find the assigned IP address Then go to the section Verify Functionality to verify the operation of the TimeVault 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 us...

Страница 44: ...2 30 TimeVault User s Manual 6000 100Ch2 fm Rev D Chapter 2 Installation and Start Up Wrap Up Advanced Operation ...

Страница 45: ...cation using the Internet or TCP IP LAN The protocol used is either Telnet or HTTP Telnet is a standard Internet communications program that is bundled with Windows 95 98 NT and connects to TimeVault through its NET Port HTTP access is provided via any standard Web Browser such as Microsoft s Internet Explorer or Netscape s Navigator Communicator You can also disable remote control capability and ...

Страница 46: ...quick access you can bookmark the Home page in Netscape or add it to your browser favorites in IE Use the buttons that always appear in the left portion of the Symmetricom web interface window to navigate from page to page The following list shows all the available web pages and how to find them An indentation means you get to that particular page from the page just above it For example you reach ...

Страница 47: ...ther way and the default password mercury in the corresponding fields on this page then click Press to Continue located just below the password box The page instantly refreshes Look in the Status Message Window for the Login passed message to see whether or not the login was successful you may have to scroll down to see it If the Status Message Window shows that login failed re enter the user name...

Страница 48: ...ult Gateway and or DHCP causes TimeVault to reset This process takes a moment during which the parameter display is blank If the unit does not reset check the status message to see why re enter the values then click Submit Changes again Remote ACTS Configuration Configuring ACTS parameters through the TimeVault web interface involves editing the values in the acts conf file You can do this from th...

Страница 49: ... time interval in minutes between call attempts flag set to ON by default do not change speed baud rate set to 9600 by default reserved for factory calibration only do not change fudge reserved for factory calibration only do not change pollcounter determines time precision vs risk of unsuccessful call reserved for factory calibration only do not change center calibration of the phone line reserve...

Страница 50: ...red by your network configuration The following are public Symmetricom NTP Timeservers Uncomment one or both to enable NTP fallback to Symmetricom if primary synchronization is lost Add any other server address Further note the first server in the list is the cross check server server 206 54 0 20 server 206 54 0 21 Private time servers example only server 192 168 1 35 Uncommenting the line below e...

Страница 51: ...e key identifiers for maximum security use a unique combination of 32 letters and numbers for each key identifier 6 Edit the file 7 Click Submit Changes located just below the display of parameter values TimeVault takes a moment to reset during which time the parameter display goes blank When TimeVault starts up again the new parameters are in place If the unit does not reset check the status mess...

Страница 52: ...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 00...

Страница 53: ...ick Submit Changes again 3 1 5 Leaving the Control Pages The control session activated with a successful login ends under the following circumstances Inactivity no page navigation or submission of changes in the last three minutes Location change navigation to a status page or the home page If inadvertently logged out navigate to the Configuration Control Login page by clicking Controls at the lef...

Страница 54: ...sion 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 3 2 1 Starting Telnet and Making a Conn...

Страница 55: ...in prompt appears If an hourglass appears instead it means the connection was not successful and you should repeat steps 1 5 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 9 Begin your Telnet session by entering F series commands 3 2 2 Ending Telnet There are three...

Страница 56: ... a computer using a null modem cable and used in conjunction 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 4 51 Serial time output is not available on t...

Страница 57: ...nal To start HyperTerminal 1 Click Start on the task bar in the lower left corner of your screen 2 Select Programs Accessories HyperTerminal HyperTerminal The Connection Description dialog box appears 3 Enter a name in this example we have used NTS for this connection in the Name box and click OK The Connect To dialog box appears ...

Страница 58: ...om port COM1 in this example then click OK The COM1 Properties dialog box appears showing the Port Settings tab 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 6 Click OK TimeVault s HyperTerminal window appears indicating that TimeVault is now connected through the Utility Port ...

Страница 59: ...p a HyperTerminal session 1 From the File menu in the session window select Properties TimeVault s Properties dialog box appears showing the Connect To tab 2 Select the Settings tab and click the Terminal keys radio button 3 In the Emulation box use the drop down menu to select VT100 terminal type do not select the Auto detect option ...

Страница 60: ... below 5 Click OK TimeVault s Properties dialog box is reactivated 6 In TimeVault s Properties dialog box click ASCII Setup The ASCII Setup dialog box appears 7 Place check marks in the following boxes Send line end with line feeds Wrap lines that exceed terminal width 8 Click OK This returns you to TimeVault s Properties dialog box 9 Click OK This returns you to your HyperTerminal session window ...

Страница 61: ... to save the current session 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 Open 2 Double click your last session The name of your last session ...

Страница 62: ...nd before full Telnet access is possible 3 4 2 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...

Страница 63: ...ings The general form of these commands is F FUNC Enter where F ASCII character F FUNC two digit function number Enter input line terminator More specifically the data input and output formats are F FUNC SP FIELD Enter input or F FUNC SP FIELD CR LF output where F ASCII character F FUNC function number SP space FIELD data entry or request CR LF output line terminator encloses a phrase that is repe...

Страница 64: ...onal and may be replaced by a semicolon In that case the corresponding value is unchanged End all input strings by pressing the Enter or Return key on your keyboard An incorrect entry may result in an error message as described in Error Messages on page 5 87 The unit responds to correct entries with OK CR LF In addition to the regular F series commands there is also a set of F100 commands known co...

Страница 65: ...nfiguration 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 Addres...

Страница 66: ...Host Lock Request F100BLS Burn Host Lock Set change requires confirmation within 10 seconds F100 BLR Burn Host Lock Reset change requires confirmation within 10 seconds F100 K I L L Reboot F100 PN Password System User Name Change XXXXXXX F100 PR Password Reset change requires confirmation within 10 seconds F100 PRESETALL Password Reset All change requires confirmation within 10 seconds F100 PL Pas...

Страница 67: ...nd Responses Element Definition CR LF Line terminator a carriage return 0x0D and line feed 0x0A SP One or more separator characters either space 0x20 comma 0x2C or tab 0x09 Either no character 0x2B or 0x2D HH Two digit hour 0 23 MM Two digit minutes 0 59 SS Two digit seconds 0 59 yyyy Four Digit Year 0 9999 dd Two Digit Day of month 1 31 DDD Three Digit Day of Year 1 366 mm Two Digit Month 1 12 SO...

Страница 68: ...digit month ASCII character slash dd one or two digit day yyyy four digit year if you manually entered this data HH one or two digit hours ASCII character for a colon MM two digit minutes SS two digit seconds replacement character Enter input line terminator CR LF output line terminator Sample Entry F03 Enter The response might be F03 UTC 01 07 1996 02 48 29 CR LF 4 3 2 F18 Software Version Reques...

Страница 69: ...satellites send the following command F53 Enter The unit responds F53 SP MODE SP SP SATS CR LF where F ASCII character F 53 function number SP space MODE SURVEY STATIC ASCII colon number of satellites being tracked Enter input line terminator CR LF output line terminator Sample entry F53 Enter The response might be F53 SURVEY STATIC SATS 6 CR LF F36 commands are for backward compatibility with pre...

Страница 70: ...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 of the following apply the satellite is visible and the satellite s ephemeris and alma...

Страница 71: ...0 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 le...

Страница 72: ...tor CR LF output line terminator An example of the response might be F67 06 30 96 1 CR LF 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 CR LF 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 t...

Страница 73: ...the default response to the confirmation prompt is negative The unit 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 unit canceling the command In those sections below where it is not already stated Enter input line terminator and CR LF output line terminator F100 Comm...

Страница 74: ...ce BASET specify Base T command Enter 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 SP BASET SP 100 Enter where 100 set maximum Base T speed to 100 To set the maximum connection speed to 10Base T send the following command F100 SP BASET SP 10 Enter where 10 set maximum Base T speed to 10 In both ...

Страница 75: ... character F 100 unit function number SP space DHCP specify DHCP command ENABLE command DHCP to be enabled Enter input line terminator To disable DHCP send the following command F100 SP DHCP SP DISABLE Enter where DISABLE command DHCP to be disabled The unit 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 t...

Страница 76: ...he unit responds F100 IP nnn nnn nnn nnn CR LF 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 unit to reset A verification prompt appears prior to execution To set the IP address and restart the unit send the following command F100 IP nnn nnn nnn nnn Enter Sample entry F100 IP 206 54 0 21 Enter The...

Страница 77: ...ch the unit executes the command and resets Within that 10 second time period any other response including no response results in the unit canceling the command 4 4 6 F100 G Gateway To obtain the Default Gateway of the unit NET Port send the following command F100 G Enter The unit responds F100 G nnn nnn nnn nnn CR LF An example of the response is F100 G 206 54 0 1 Changing the Default Gateway req...

Страница 78: ... input line terminator The unit responds Enter new user password When you enter a new password the unit responds with Enter it again Enter the same new password again to confirm the spelling If the same new password has been entered twice the unit responds with OK CR LF In this case the new password will be used for the next login serial or Telnet However if the new password is entered differently...

Страница 79: ...100 SP ST Enter where F ASCII character F 100 unit function number SP space ST specify ST command Enter input line terminator The unit responds F100 SP ST SP FLASH CRC SP SP STATUS SP RAM SP SP STATUS SP SERIAL SP SP STATUS SP VER SP SP STATUS CR LF where F ASCII character F 100 unit function number SP space ST specify ST command FLASH CRC specify flash checksum result RAM specify RAM test result ...

Страница 80: ...00 unit function number SP space VER specify Version Request command Enter input line terminator An example of the response is f100 VER f100 VER BOOTLOADER 182 9006v008 SOFTWARE 182 9007v008 FILE SYSTEM 182 9008v008 NVRAM VER 2 4 4 11 F100 T Current Time Source Request Use Current Time Source Request to know which time source TimeVault is currently using To query the current time source send the f...

Страница 81: ...t come with your ftpdaemon 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 unit 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 SP CONFIG SP ACTION SP TYPE SP HOST IPADDRESS SP DIR DIRECTORY Enter where F ASCII ch...

Страница 82: ...fied data from the configuration file in your directory back to the unit Once again you must specify your IP address and the directory on your hard drive that contains the configuration file Set commands cause the unit to reboot A confirmation prompt appears to which you must respond affirmatively y within 10 seconds before the unit executes the command and resets In a get command line you can ent...

Страница 83: ...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 GPS failure is detected automatically Note that when the NTS is using these timeservers the system is at best running with 20 millisecond precision Up to 10 NTP servers can be assigned in this file The addresses below are exampl...

Страница 84: ...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 unit executes the command and resets Within that 10 second time period any other response including no response results in the unit canceling the command Editing the MD5 k...

Страница 85: ...5 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 bclient Sample information in a client ntp keys f...

Страница 86: ...metricom Inc 707 528 1230 sysName TimeVault 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 ...

Страница 87: ... R read only IP Addresses 3 Return the revised data to the unit by sending a set command F100 config set snmp host 192 168 1 14 dir temp The unit responds Are you sure y N If you answer y the unit 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 comma...

Страница 88: ...st 192 168 1 14 dir temp TimeVault responds Host config ip 192 168 1 14 configured successfully Source file config acts conf bytes read 149 Dest File temp acts conf bytes written 149 Configuration files transferred successfully CR LF follows each line An example acts conf file might look like number 3034944774 line 9 inter 1 type tone retry 5 timeout 4 duration 60 delay 3 period 15 flag ON speed 9...

Страница 89: ...ation only do not change modemInit modem initialization string reserved for factory calibration only do not change 2 Edit the data in the acts conf file by adding or renaming servers from this list 3 Return the revised data to TimeVault by sending a set command F100 config set acts host 192 168 1 14 dir temp TimeVault responds Are you sure y N CR LF If you answer y TimeVault responds as follows th...

Страница 90: ... sure y N If you answer y and press Enter the unit 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 unit executes the command and resets Within that 10 second time period any other response including no response results in the unit canceling the command If you are using Tel...

Страница 91: ... host and file for upgrading send the following command F100 BH FTP host IP address SP Upgrade file path file name Enter For example F100 BH 10 1 7 20 Lassen Rel REL20010518 nts200 192 9004v001 BIN The unit responds Burn host is ready This command can be disabled by the Burn Host Lock command which denies serial and Telnet access However if you enter BootLoader mode this command is always availabl...

Страница 92: ...ture after sending this command you have 10 seconds to respond affirmatively enter the letter y to the confirmation prompt after which the unit executes the command and resets Within that 10 second time period any other response including no response results in the unit canceling the command Unit example execution Burning Prog1 Burning file 182 9004v001 bin with size 688052 to partition 1 sector 6...

Страница 93: ...ng Boot Burning file 182 9003v001 BT with size 342860 to partition 0 sector 0 Sec 0 re 0 Sec 1 re 0 Sec 2 re 0 Sec 3 re 0 Sec 4 re 0 Sec 5 re 0 Flash successfully programmed CRC32 0xE3E0ECAE 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 wh...

Страница 94: ...which the unit executes the command and resets Within that 10 second time period any other response including no response results in the unit 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 Unit example execution Serial Port System Power On Self Test Results Serial Loopback Test Passed...

Страница 95: ...software via serial or Telnet connections To set the burn host lock send the following command F100 BLS Enter The unit responds Are you sure y N If you answer y and press Enter the unit 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 unit executes the command and resets Wi...

Страница 96: ...y defaults To reset all the passwords to factory defaults send the following command F100 PRESETALL Enter The unit responds Are you sure y N If you answer y and press Enter the unit 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 unit executes the command and resets Within...

Страница 97: ...s To reset the passwords to factory defaults send the following command F100 PR Enter The unit responds Are you sure y N If you answer y and press Enter the unit 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 unit executes the command and resets Within that 10 second time...

Страница 98: ...on PASSWORD_SETTING_DISABLE_BIT 1 4 4 29 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 Enter The unit responds Are you sure y N If you answer y and press Enter the unit executes the command As a safety feature after sending this command you have 10 seconds to respond affirmatively enter th...

Страница 99: ...ly remove an NTP peer node from the polling list After logging out when you log back in the original peer settings will be active To remove a peer send the following command F100 PE REM IP Address Enter For example F100 PE REM 206 254 000 021 Enter 4 4 33 F100 PI PING Use F100 PI to ping a remote host to see if it is reachable To ping a known host send the following command F100 PI IP Address Ente...

Страница 100: ... 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 4 5 2 Guest Login Use the guest login to view function requests As shipped you can access the Guest level with User Name guest Password truetime To maintain security change the Guest password at installation If y...

Страница 101: ... Invalid Command Meaning You have entered an invalid command Recovery Action Consult the manual for the correct command and re enter 5 1 4 ERROR Can t create netdevice NAME Meaning TimeVault 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 5 1 5 ERROR Can t set host NAME ip ADD...

Страница 102: ...R Can t open dest file NAME 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 5 1 9 ERROR Can t write file NAME 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 c...

Страница 103: ... 1230 or support symmetricom com 5 3 Informational Messages Messages in this section inform you of events and do not require any action on your part 5 3 1 Deleted previously set IP host address Meaning Your last action deleted the previously set IP host address 5 3 2 NOTICE Cannot respond to command because Utility Port session has priority Meaning A Utility Port session has started and takes prec...

Страница 104: ...equires a soft restart of TimeVault The restart happens immediately after this message is sent 5 3 7 DHCP is enabled Meaning You have just successfully entered the Enable DHCP command 5 3 8 DHCP is disabled Meaning You have just successfully entered the Disable DHCP command 5 3 9 OK Meaning Command accepted and processed as specified 5 3 10 Goodbye Meaning TimeVault has just terminated a session ...

Страница 105: ...ny search engine and typing RFC in the search field or RFC if you have the number Two such search engines can be found at the following Internet addresses http www lycos com http www altavista com A 1 NTP V 3 0 Data Format per RFC 1305 A 1 1 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 Tim...

Страница 106: ...ed time error has exceeded the value of the root dispersion Version Number The version number is a three bit integer that specifies the NTP version TimeVault 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 packets are not supported Mode The mode is a three bit integer that determines the functions TimeVault performs T...

Страница 107: ...ing 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 TimeVault 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 p...

Страница 108: ...riginate timestamp is a 64 bit timestamp format representing the time that the request 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...

Страница 109: ...nces Leap Indicator TimeVault sets these 2 bits to either 0 normal or 3 unsynchronized only Version Number TimeVault copies this field from the client request packet and returns it in this field Reference Timestamp This field is set to the time that the reply left TimeVault s server host Receive Timestamp This field is set to the time that the reply left TimeVault s server host Transmit Timestamp ...

Страница 110: ...n of NTP NTPQ uses NTP mode 6 control mode packets to query NTP servers and any compatible servers on the network that permit it about current state as well as to request changes in that state NTPQ can also obtain and print a list of peers in a common format by sending multiple queries to the server A 3 2 NTPDC NTPDC is a special query program that uses NTP mode 7 private mode packets to provide e...

Страница 111: ...onality with NTPQ and NTPDC Appendix A NTP Version 3 NTPQ and NTPDC NTPDC http www eecis udel edu ntp ntp_spool html ntpdc htm http hoth stsci edu man man1M ntpdc html and http www unix digital com faqs publications base_doc DOCUMENTATION V40F_HTML MAN M AN8 0218____ HTM ...

Страница 112: ...A 98 TimeVault User s Manual 6000 100AppA fm Rev C Appendix A NTP Version 3 NTPQ and NTPDC Cross Check Functionality with NTPQ and NTPDC ...

Страница 113: ...r cryptographic ciphers MD5 does not hide the data within the packet The MD5 authenticated NTP packet is still readable This means MD5 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 c...

Страница 114: ...need the following information Maximum number of user definable MD5 keys in the ntp keys file 24 Maximum number of trusted keys that can be defined in an ntp conf file 20 Maximum number of keys that can be used in NTP broadcast mode 20 Maximum text length of MD5 key value in ntp keys file 32 ASCII characters For more technical information on MD5 see the MD5 RFC 1321 NTP RFC 1305 and the release no...

Страница 115: ...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 read...

Страница 116: ...ast 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 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 all ones You may use all...

Страница 117: ...red 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 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 follo...

Страница 118: ......

Страница 119: ... 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 d...

Страница 120: ...eceived is thrown away The service closes the connection after sending the quote C 2 2 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 ignore...

Страница 121: ...is 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 Activ...

Страница 122: ...e Trusted IP flag is set to yes then this is the table of IP host addresses that 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 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 tu...

Страница 123: ...MP variable snmpEnableAuthenTraps 0 Note The state of this flag has no effect on the issue of coldstart trap messages Return To Main Menu This leads back to the main SNMP function window Save settings When SNMP Global Enable Traps is changed this becomes visible and answering yes immediately saves the change to Symmetricom s SNMP Answering No negates the change Key Word Definition Community 1 Comm...

Страница 124: ...nagement 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...

Страница 125: ...t 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 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...

Страница 126: ... 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 read only STATUS current DESCRIPTION This is an ASCII string sent to UDP port 162 or user defined when the TrueTime time server reinitializes The message is Cold Start Trap ...

Страница 127: ...message is GPS Antenna from Where is either GPS Antenna OK GPS Antenna Open or GPS Antenna Short and is the doted decimal notation of the IP address of the unit reporting the change trapMsg 4 trapMsgGpsUnlocked 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 TrueTime time server s...

Страница 128: ...he doted decimal notation of the IP address of the unit reporting the change trapMsg 7 ntpInPkts OBJECT TYPE SYNTAX Counter MAX ACCESS read only STATUS current DESCRIPTION Total number of NTP packets delivered to the NTP application layer from the transport layer ntp 1 ntpOutPkts OBJECT TYPE SYNTAX Counter MAX ACCESS read only STATUS current DESCRIPTION Total number of NTP packets passed from the ...

Страница 129: ...stant 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 ntpSys...

Страница 130: ...ts outgoing NTP packets stratum field and ntpSysStratum to 1 ntp 9 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 serve...

Страница 131: ...e 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 ntp 13 ntpSysRefClockIdent OBJECT TYPE SYNTAX DisplayString SIZE 0 4 MAX ACCESS read only STATUS current DESCRIPTION This is a four byte ASCII string ide...

Страница 132: ...lOutput below ntsControl 1 ntpControlOutput OBJECT TYPE SYNTAX DisplayString SIZE 0 255 MAX ACCESS read only STATUS current DESCRIPTION This variable emulates 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 above ntpControlInput variable Use this variable for ...

Страница 133: ...See section 3 20 of the users manual for a complete description of these modes Generally modes 0 and 1 are used for time applications Mode 2 is useful for more accurate position information when the unit is stationary or slowly moving and mode 3 is for accurate position information when the unit is moving quickly gps 4 gpsSatMaxSigStrength OBJECT TYPE SYNTAX INTEGER 0 30 MAX ACCESS read only STATU...

Страница 134: ...o 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...

Страница 135: ...ls to connect this is the time in seconds to wait to try again acts 3 actsMaxCallPeriod OBJECT TYPE 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 This is the pho...

Страница 136: ...ailedInit OBJECT TYPE SYNTAX Counter MAX ACCESS read only STATUS current DESCRIPTION Time server s internal modem failed to initialize If this is excessive it may indicate a time server hardware failure acts 9 actsNoDialTone OBJECT TYPE SYNTAX Counter MAX ACCESS read only STATUS current DESCRIPTION Time server s internal modem found no dial tone This may be caused by a broken phone line to the tim...

Страница 137: ...IPTION 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 ...

Страница 138: ......

Страница 139: ...JJJ the Modified Julian Date MJD The MJD is the last five digits of the Julian Date which is the number of days since January 1 4713 B C To get the Julian Date add 2 4 million to the MJD YRMODA the date showing the last two digits of the year the month and the current day of month HH MM SS the time in hours minutes and seconds The time is always sent as Coordinated Universal Time UTC An offset nee...

Страница 140: ...it will change to reflect the actual one way line delay UTC NIST a label indicating that you are receiving Coordinated Universal Time UTC from the National Institute of Standards and Technology NIST OTM an on time marker in the form of an asterisk Once the time code is synchronized within a few milliseconds of UTC NIST the asterisk changes to a pound sign as described below The time values sent by...

Страница 141: ...eVault User s Manual F 127 F 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 ...

Страница 142: ......

Страница 143: ...dcast Mode without 102 103 Auto Configure 61 Automatic Time Out For Display Security Feature 27 B Backward Compatibility 55 Bad Satellite 56 Broadcast Mode Editing MD5 Keys 70 71 with Authentication 70 71 101 without Authentication 102 103 Browser 32 Addresses 91 100 107 See also Web C Cabling 15 16 Change User Password F100 P 64 Chassis 3 16 Cold Boot 17 Commands and Responses Serial Telnet Commo...

Страница 144: ...100 BLS 81 F100 BU 77 F100 BUB 79 F100 CONFIG 67 F100 DHCP 61 F100 EA 62 F100 G 63 F100 IC 64 F100 IP 62 F100 K I L L 80 F100 L 76 F100 LOCK 76 F100 P 64 F100 PI 85 F100 PL 83 85 F100 PLR 84 F100 PLS 84 F100 PN 82 F100 PR 83 F100 PRESETALL 82 F100 PT 77 85 F100 SM 63 F100 ST 65 F100 T 66 F100 VER 66 F18 54 F36 55 F53 55 F60 56 F67 58 F72 58 Fault Status Request F72 58 Formats Serial Telnet Command...

Страница 145: ...Error 87 88 Informational 89 90 MIB 29 107 108 110 Protocol 6 MIB II 107 Protocol 6 MIlls Dr David 2 99 Web Site 100 Minor 87 Mode 92 Survey Static 55 Mounting Chassis 11 N NET Port 2 6 8 12 40 42 48 Configuration Single Entry F100 59 Default Gateway F100 G 63 IP Address F100 IP 62 Network Configuration Commands F36 or F100 55 Initial 28 29 Using Serial Telnet Commands 59 Using the Internet 34 Sub...

Страница 146: ...16 Rolling Redundancy 22 Root Delay 93 RS 232 8 12 16 42 Pinouts and Signal Levels 42 S Satellite 13 Acquisition 17 18 Current 56 Enabled 56 Good Bad 56 Number Currently Tracked F53 55 PRN Number 56 Tracked List 56 Security 24 27 33 86 Automatic Time Out 27 SNMP 108 Self Test Status F100 ST 65 Serial 2 8 12 33 40 42 Access 42 47 Remote Control Lockout F100 LOCK 76 Commands and Responses Common Ele...

Страница 147: ... 48 Temperature 4 5 Terminal 12 41 42 Terminal Strip DC Model 48 VDC 15 Test Status F100 ST RAM test 65 Time and Date Entry Request F03 54 TIME Protocol 6 105 Timeout 41 Timers Session 48 Tracked 55 56 Tracked Satellite 56 Trap 108 110 U UDP 6 91 105 106 111 User Password Changing F100 P 64 UTC 21 54 Time 18 23 105 106 Default Format 21 Utility Port 40 42 51 89 Session Timer 48 W Warranty 2 Web Ac...

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