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GlobalTime NTP Products

3.6.4

SNMP settings

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3.6.5

Check the status

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3.7

Client configuration

3.8

Troubleshooting

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3.8.1

All indicator lights are off when power is on

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3.8.2

Receiving no satellite signals for a long time

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3.8.3

Can not ping the time server

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3.8.4

Instable satellite signal, and the machine is in hold mode sometimes

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3.8.5

The client can not receive timing service

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3.8.6

How to configure the network equipment to receive time service

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Chapter 4

Detailed performance index of the equipment

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Chapter 5

Appendix

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Chapter 1

The basic product information and packaging

GTT-200 network time server is the professional network equipment providing high-stable

time source. GTT-200 network time server receives GPS satellite signals and extracts the

timing information to adjust the server's local time. It distributes standard time via NTP

protocol (Network Time Protocol). If a PC or server needs time synchronization services, it

Summary of Contents for GTT-200

Page 1: ...GlobalTime NTP Products 1 Tel 86 21 36531186 Fax 86 21 36531185 Web www ntpclock com Email contact ntpclock com Add A2 1 No 399 Dakang Road Baoshan District Shanghai China Zip code 200443...

Page 2: ...e 10 3 2 The keyboard display 10 3 3 Server configuration debugging 11 3 3 1 User login 12 3 3 2 Change network setting 12 3 3 3 NTP configuration 13 3 3 4 SNMP setting 14 3 3 5 Heartbeat check option...

Page 3: ...ive timing service 26 3 8 6 How to configure the network equipment to receive time service 26 Chapter 4 Detailed performance index of the equipment 27 Chapter 5 Appendix 28 Chapter 1 The basic product...

Page 4: ...to delivery time Support RFC1769 2030 SNTP protocol Simple Network Time Protocol Different client programs support 98 2000 NT XP Linux Unix FreeBSD and other operating systems Two 10 100M BaseT adapt...

Page 5: ...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...

Page 6: ...nt UTC time The keyboard to check and modify the system configuration Two power lights to indicate the two way power supply Four indicator lights to indicate the service status of GPS and NTP The back...

Page 7: ...tdoor installation The outdoor part is composed of the GPS satellite receiving antenna transmission cables and antenna amplifier The installation attentions are as follows At first the antenna install...

Page 8: ...no corner In this way it can receive at least half of the satellite signal But as a long term using equipment it is recommended that the antenna is installed in high places while the outside installa...

Page 9: ...g 220V AC to the master device the indicator light Power on the front panel will light which indicates the running of power supply is normal To measure the BNC antenna socket with a multimeter the fee...

Page 10: ...se OCXO for time keeping green Use OCXO to for time keeping M S off Hot standby status green The host status 3 2 The keyboard display VFD display vacuum fluorescent display is of high brightness and w...

Page 11: ...Lon Longitude Ht Height Sat Number of satellites NTP Information Stratum Server stratum Root disp Root discrepancy Source Synchronous source The third level menu of the network information can be edi...

Page 12: ...e hyper terminal press ENTER and you will see the login interface just like the figure 3 2 shown Then enter the user name ntpuser and the password Users Note Pay attention to the last Once logging in...

Page 13: ...ccordance with settings entered then select Y and it will change the equipment configuration This configuration can not take effect until rebooting the server So we need to restart the server We can m...

Page 14: ...he data port SNMP_PORT 161 SNMP Information query port The above three can be modified 3 3 5 Heartbeat check optional function MASTER N represent whether it is started as the host LOCALPORT 6050 Heart...

Page 15: ...eceiver with the backup machine are both in normal operation then the backup machine automatically switches to the host To prevent the devices from frequent switching when the GPS is not working well...

Page 16: ...o the change password interface shown as figure 3 5 At first you need to type the original password If correct it will prompt to a new password The user password contains 5 8 characters Note the passw...

Page 17: ...GlobalTime NTP Products 17 SSH login configuration interface 3 4 1 Time zone display function Our new version allows users to configure time display on the front panel in different time zones...

Page 18: ...p maintenance with the serial monitoring port of GTT 200 network time server In order to make it please follow these steps Initially set the MODEM to auto answer mode and connect the MODEM and a compu...

Page 19: ...ration is as introduced in section 3 2 3 6 Time server logon through the web browser To configure the server via IE browser Enter the time server s IP address in the address bar If It displays the fol...

Page 20: ...ation bar it will enter the network configuration item in the navigation bar click on Network Settings Network settings are divided into DEVICE BOOTPROTO IPADDR NETMASK and GATEWAY They represent the...

Page 21: ...ation about the current card will be set out as below 3 6 3 NTP settings Click NTP Settings in the navigation bar to enter the NTP setting item as below NTP settings The items BROADCAST TRUSTED KEY PE...

Page 22: ...6 4 SNMP settings Click the SNMP Settings in the navigation bar to set the SNMP items as shown below SNMP settings The settings are divided into SNMP_TRAP_IP SNMP_TRAP_PORT and SNMP_PORT That is to s...

Page 23: ...y set The specific setting methods are as follows Firstly double click the time mark on the right side of the windows task bar and it will pop up an interface with date and time properties Then select...

Page 24: ...d stop windows time service and restart it Then the time interval can be updated If it has been installed with other time synchronization software you need to uninstall the software and restart the co...

Page 25: ...e near end resistance will be only a few ohms If it is shown abnormal verify the feeder and the connector is intact The normal faults the quality of the line is not good the connectors are not done we...

Page 26: ...should be allowed to go through the intranets gateway and the firewall Please check the gateway and the firewall configuration 3 8 6 How to configure the network equipment to receive time service NTP...

Page 27: ...itional Accuracy 100 meters Timing performance Server Time Level Stratum 1 Server time precision 1ms Precision of client time 10ms Timing capacity 1000 times per second Network protocol support RFC 11...

Page 28: ...d services We have our own intellectual property rights We provide 7x24 hour hot line for technical support If you have any inquiry about our products or the solutions please feel free to contact us Z...

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