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GlobalTime Electronic GTT-400, Manual

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GlobalTime

™

NTP Server

10

Second, modify the default windows time server. For example, we set it to be 192.168.2.8.
Third, click “apply” and then “update”. Windows synchronizes once in a week under default settings. If the
interface display that the PRC is not available, please open the control panel, choose “management tool”/”service”,
find “window time” and then choose opening the service automatically and start the service.
Fourth, we can modify the registry to change the synchronization frequency if we want. The specific registry info is
at:

\

HKEY_LOCAL_MACHINE

\

SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NtpClient\SpecialPollInterval.

The default is 604800 = 60 × 60 × 24 × 7, namely, a week.
synchronization once a day: The default is 86400
synchronization once an hour: The default is 3600
synchronization once ten minutes: The default is 600

Fifthly, after modifying the registry, you should stop windows time service and restart it. Then the synchronization
frequency can be updated.
If it has been installed with other time synchronization software, you need to uninstall the software and restart the
computer. Then the windows time service can work normally.
For Win2000/98 operating system, the time synchronization software provided by our firm or
provided by the third-party are both available. The specific configuration can be referred to
the respective user manual.
For UNIX systems, in general, there is ntpd daemon or xntpd daemon. Create the ntp.conf configuration file under the /
ETC directory and type "server ******" ( time server IP) in it. Then starting the daemon will do.
Regarding the details, please refer to the user manual or consult us.

3.7. Troubleshooting
3.7.1. Display Wrong Time When Power is on

After started, the server will display 1

st

, Jan, 2000. Only after it receives the satellite signal and lock, it will display

correct time. So please make sure that the antenna is working properly.

Summary of Contents for GTT-400

Page 1: ...NTP Server High Performance Enhanced Security Network Time Server Add Floor 7 Building 4 No 651 Wanfang Road Minhang District Shanghai China Tel 86 21 3653 1186 Fax 86 21 3653 1185 Web http www ntpclock com Email contact ntpclock com ...

Page 2: ...ng Page 10 3 7 1 Display Wrong Time When Power is on Page 10 3 7 2 All indicator Lights are off When Power is on Page 11 3 7 3 Can not Receive Satellite Signal for Long Time Page 11 3 7 4 Can not Ping the Server Page 11 3 7 5 Unstable Signal and the Server is in hold mode sometimes Page 11 3 7 6 Clients can not Get Time Service Page 11 3 7 7 How to Make Network Devices Get Time Service Page 11 Cha...

Page 3: ...xceptional time accuracy to UTC Extended environmental specifications IPv4 on all ports Rubidium atomic clock or OCXO oscillator upgrades Single power supply or dual power supply option Can be set as a slave time server to synchronize with host time server One 10M 100M 1000M adaptive network interface NTP Reflector option 20000 NTP client mode three requests per second TOD 1PPS 10MHz out MTBF 9000...

Page 4: ...ity has achieved the10 13 level of magnitude of cesium atomic clock which is equivalent to be only 1 second slower during 30 years To adjust local time with this reference signal can eliminate the accumulation of deviation resulted from the low accuracy of local clock time and also can greatly improve the timing precision of the server GTT 400 network time server use the professional GPS timing re...

Page 5: ...NC Socket on the panel Four 10 100M 1000M adaptive network ports One USBhost for upgrading the program and back up of the configuration One dry contact relay for alarming Chapter 2 Installation and Commissioning of the Device 2 1 Structure of the Server The server consists of the outdoor part and interior part The outdoor part is composed of the GPS satellite receiving antenna lightning arrester a...

Page 6: ... should install the arrester in the cable Normally the arrester will be installed at the position where the cable goes through the wall In this way the arrester can be well earthed The arrester should also be installed between the feeder and the server Then lead the grounding wire from the arrester and connect it to the earth The earth resistance should be under 4 Ω and must be firmly connected to...

Page 7: ...effect After reboot input the IP address of the PING server in another computer to check the network settings correct or not Last log on the network time server through Telnet to observe the satellite receiving state the information on time tracking state of the server and so on When the server locks the satellite time The indicator light on the panel turns green the server starts to provide time ...

Page 8: ...rk 2 bound0 Please choose 1 and click the key OK to set the network We can click back button to go to the previous menu Remarks 2 boud0 is not available currently 4 1 Goes into independent network menu and click the up and down key to choose ETH0 ETH1 ETH2 ETH3 for configuration We need to click the key OK to confirm the choice each time 4 2 After we choose a ETH it will display IP netmask gateway...

Page 9: ...een working version means the version of the software 3 3 Configuration of the Server The server GTT400 has four 10M 100M 1000M adaptable Ethernet interface The default IP of ETH0 ETH1 ETH2 ETH3 is 192 168 0 8 192 168 1 8 192 168 2 8 192 168 3 8 Every ETH support ping thus we can check if the configuration is successful We can manage the server trough the local serial cable connection or the remot...

Page 10: ...can manage and do configuration to the system 3 4 Login Server by Internet For security the server support ssh login The login interface is as the below picture shows 3 5 Remote Dial up Maintenance We can use the MODEM to achieve remote dial up maintenance with the serial monitoring port of the server Please see the following steps Initially set the MODEM to auto answer mode and connect the MODEM ...

Page 11: ...ephone line Finally dial this number through the Hyper Terminal of another computer with MODEM and it can be connected with the server The configuration is as introduced in section 3 2 3 6 Configuration of Client Program For WinXP 2003 the system contains NTP service we can set directly like below First double click the time marks at the taskbar then we can see the interface of date and time prope...

Page 12: ...ly after modifying the registry you should stop windows time service and restart it Then the synchronization frequency can be updated If it has been installed with other time synchronization software you need to uninstall the software and restart the computer Then the windows time service can work normally For Win2000 98 operating system the time synchronization software provided by our firm or pr...

Page 13: ...t is normal by observing HUB or switch connected with the time server And then check if there is something wrong with the network settings You can use a crossing cable to connect the server to the computer directly to see if ping is ok Then use HUB to test in the same network segment Finally test the different segments Following these steps it is easy to troubleshoot Some firewall software on your...

Page 14: ...92 168 2 8 we will see the below interface the username is admin the default password is 123456 2 After login we will see the below information Net Set If we want to do configuration for an individual network port or reset password we should click the button Net Set then we will see the below ...

Page 15: ...se to open or close the chosen bond Interfaces choose the individual network ports for bonding 3 After the configuration we need to reboot the sever 4 2 Login via ssh We can login via console port or network port The username is ntpuser the default password is ntpuser2016 The serial port for console login should be setted as 115200N81 If we want to use network port to login we should login via SSH...

Page 16: ...he configuration of network Please input N or Y Input Q return 4 2 3 NTP Configuration When we choose NTP Configuration we will see the below information 1 NTP server 2 NTP broadcast 3 MD5 keys 4 Select NTP MD5 key Q Exit choice When GPS BD signal is available NTP Server can work as stratum 1 server when GPS BD signal is not available it can work as stratus 2 server When there is many SNTP termina...

Page 17: ...Time 3 Uptime 4 Reboot 5 Reset configuration Ping function is not stable in a server which has more than 1 network ports of different network segment We should only ping the IP of a specific network segment to check the network configuration Time refers to the UTC Uptime refers to how long the server has been working Chapter 5 SNMP Monitoring 5 1 Set SNMP TRAP IP Address If there is client we need...

Page 18: ...ick enter button to get into the next menu Then we should input 3 and click enter button to set SNMP TRAPIP After saving the configuration we need to reboot the sever so that the configuration will take effect 5 2 Introduction of SNMP OID 5 2 1 TRAP OID 1 3 6 1 4 1 2354 1 3 1 means cold starting it is character string TrapMsgColdStart means the server is starting successfully for the first time ...

Page 19: ...ns NTP time source it is character string It refers to satellite or OCXO The format is TimeSource BD TimeSource can be BD GPS BD OCXO 1 3 6 1 4 1 2354 1 2 8 0 means the status of CPU The range is 0 100 The format is 6 means the usage rate of the server is 6 1 3 6 1 4 1 2354 1 2 9 0 means the memory The range is 0 100 The format is 4 means the usage rate of the memory is 4 1 3 6 1 4 1 2354 1 4 7 0 ...

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