GlobalTime Electronic NTP User manual

High-Performance, Enhanced Security Network Time Server
Manual of NTP Server
High-Performance, Enhanced Security Network Time Server

High-Performance, Enhanced Security Network Time Server
Table of Contents
1. Device Appearance ......................................................................................................................................1
2. Hardware Installation and Debugging ...........................................................................................................1
2.1. Device Structure ............................................................................................................................... 1
2.2. Outdoor installation .......................................................................................................................... 2
2.3. Indoor installation .............................................................................................................................3
3. Device Operation ........................................................................................................................................ 4
3.1. Indicator Light Status .........................................................................................................................4
3.2. Panel Display and Keyboard ...............................................................................................................4
3.2.1. The Main Panel Display ........................................................................................................... 4
3.2.2. Panel Login ............................................................................................................................. 5
3.2.3. Menu Introduction and Operation ........................................................................................... 5
3.2.2.3.1. View and Modify Network Configuration ............................................................................5
3.2.2.3.2. Enabling, Disabling, and Modifying Bonding Configuration ................................................8
3.2.2.3.3. Checking the NTP Service Status ......................................................................................... 9
3.2.2.3.4. Checking the Satellite and Antenna Status ..........................................................................9
3.2.2.3.5. Viewing and Modifying the Time Zone ................................................................................9
3.2.2.3.6. Modifying the Satellite Receiving Mode ............................................................................10
3.2.2.3.7. Modifying the Device Panel Password ...............................................................................10
3.2.2.3.8. Disabling and Enabling the SSH Service .............................................................................10
3.2.2.3.9. Viewing the System Status .................................................................................................11
3.2.2.3.10. Viewing Device Information ............................................................................................ 11
3.3. Client Configuration ........................................................................................................................ 11
3.4. Server Configuration and Debugging ................................................................................................ 13
4. Remote Management and Monitoring ....................................................................................................... 14
4.1. Login Information ........................................................................................................................... 14
4.2. HTTP/HTTPS Login ...........................................................................................................................14
4.3. SSH Login ........................................................................................................................................19
4.4. SFTP Login ...................................................................................................................................... 19
5. Common Malfunctions and Maintenance ................................................................................................... 20
5.1. Common Malfunctions .................................................................................................................... 20
5.1.1. The time displayed on the time server is incorrect after power on ...........................................20
5.1.2. All indicator lights do not turn on after power on ................................................................... 20
5.1.3. The device cannot receive satellites for a long time ................................................................ 20
5.1.4. Cannot ping the time server after configuring the network ..................................................... 21
5.1.5. Satellite reception is unstable, and sometimes the device enters a hold state .......................... 21
5.1.6. The client cannot receive time synchronization services ..........................................................21
5.1.7. How to configure network devices to receive time synchronization services ............................ 21
5.2. Daily Maintenance .......................................................................................................................... 22

High-Performance, Enhanced Security Network Time Server
5.2.1. Purpose ................................................................................................................................22
5.2.2. Checklist ...............................................................................................................................22

High-Performance, Enhanced Security Network Time Server
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1. Device Appearance
• OLED display with 64x256 resolution in green, displaying device basic status and current time.
• Sixteen-key keyboard for viewing and modifying system configuration.
• Six status lights indicating satellite, NTP and other service statuses, as well as power supply for
two power sources.
The device panel is shown in the above figure. There are two power sockets with fuses on the back
panel. After opening the fuse socket, there is one primary and one backup fuse, making it
convenient for customers to replace them. The fuse specification is 0.5A.
The antenna socket is a 50-ohm BNC female socket.
There are 4/2/1 10M/100M/1000M adaptive Ethernet ports and one serial port for monitoring.
There is an antenna input port and a handheld device input port.
There is a USB host interface for program upgrades and configuration backups.
A dry node relay triggers an alarm.
2. Hardware Installation and Debugging
2.1. Device Structure

High-Performance, Enhanced Security Network Time Server
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GPS Antenna
The NTP time server consists of an outdoor part and an indoor part.
The outdoor part mainly consists of a GPS/BDS satellite receiving antenna, a lightning arrester, and
an antenna amplifier (optional). Its function is to receive satellite signals.
The indoor part is the main device of the NTP time server, which completes satellite signal
demodulation, local clock calibration, and implementation of the NTP protocol. It provides NTP
time service to other network devices through Ethernet ports.
Below are detailed introductions to the installation of the indoor and outdoor parts.
2.2. Outdoor installation
The outdoor part of the NTP time server consists of a GPS/BDS satellite receiving antenna,
lightning arrester, and antenna amplifier (optional), which are responsible for receiving satellite
signals. The indoor part is the main equipment of the NTP time server, which completes satellite
signal demodulation, local clock calibration, NTP protocol implementation, and provides NTP time
service to other network devices through the network port.
The following are detailed instructions for the installation of the indoor and outdoor parts.
The outdoor part of the NTP time server consists of a GPS/BDS satellite receiving antenna,
transmission cable, and antenna amplifier. The installation precautions are as follows:
Firstly, the installation position of the antenna should be carefully selected as it has a significant
impact on the equipment's operation. The antenna should be installed in a high and unobstructed
location, such as on the roof, and the sky above should be open. For optimal performance, the
elevation angle should be maintained at 15 degrees or more without obstruction. It is useless to
install the antenna indoors as GPS/BDS satellite signals are very weak and cannot be received
indoors. Tree cover or plastic rain shelter above the antenna generally has little effect, but other
obstructions have a significant impact on the signal. In fact, placing a book on the antenna can
completely block the satellite signal.
During antenna installation, it should be positioned lower than the lightning rod or other buildings

High-Performance, Enhanced Security Network Time Server
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Floor 7, Building 4, No. 651, Wanfang Road, Minhang District, Shanghai, China / 201112
Tel: [phone] Fax: [phone]
Email: [e-mail] Website: www.ntpclock.com
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that attract lightning and at a distance of 10-15 meters from them. GPS/BDS antennas themselves
are rarely struck by lightning but are often damaged due to the strong induced electric field from
surrounding buildings (lightning rods, towers, etc.) being struck. A lightning arrester can be
installed on the cable. The lightning arrester should be installed at the position where the cable
enters the wall, making it easier to ground properly. The lightning arrester is installed between the
feeder cable and the equipment, and the ground wire is led out from the lightning arrester to the
ground pole. The ground resistance of the ground pole should be below 4 ohms, and it must be
firmly connected to ensure reliable discharge during lightning strikes.
Sometimes the antenna can be installed outside a window, which requires the building around it to
be open and without corners, so at least half of the sky's satellites can be received. However, as an
instrument for long-term use, it is strongly recommended that the antenna be installed at a high
location, and installation outside a window should only be used for temporary testing.
The area around the GPS/BDS antenna installation position should not have high-power microwave
transmitters operating on the same frequency band, and other high-power electromagnetic
radiation on other frequency bands should be avoided from directly irradiating the GPS/BDS
antenna.
If the length of the feeder cable between the antenna and the equipment is less than 100 meters,
it can be connected directly. If it is between 100 and 200 meters, a line amplifier should be added.
If it is between 200 and 300 meters, two line amplifiers should be added. For longer feeder cables,
please contact the engineering staff as we have a specialized plan. Longer feeder cables usually use
the 1/2 inch RF cable from the American Andrew company, and the loss of this cable is 12.8
dB/100 m.
The main precautions during the installation of the feeder cable are:
Do not bend it too much, which can cause the conductor inside the feeder to break.
When the feeder cable enters the room, it should be bent into a U-shape to prevent water from
pouring in.
Frequency Range:
1575 +/- 50MHz
RF Connector:
N Type
Polarization Mode:
Right Handed circular
polarization
Installation Method:
Screw (M24 x 1.5)
Connector
Antenna Gain:
≥3.5dB
Volume:
Ø96 x 126mm
Amplifier Gain:
≥37dB
Operating Temperature:
-45℃to 85℃
Noise Figure:
≤1.5dB
Storage Temperature:
-50℃to 90℃
Interference Suppression:
25dB( f0+/- 100MHz)
Humidity:
0 to 100%
Power Consumption:
3V x 20mA
Technical Index of Antenna
2.3. Indoor installation
After connecting the main device to 220V AC power, the "power" indicator light on the front panel
of the device should light up, indicating that the power part of the device is working normally. At
this time, when measuring the BNC socket of the antenna with a multimeter, there should be a 5V

High-Performance, Enhanced Security Network Time Server
GlobalTime Electronic Co., Ltd
Floor 7, Building 4, No. 651, Wanfang Road, Minhang District, Shanghai, China / 201112
Tel: [phone] Fax: [phone]
Email: [e-mail] Website: www.ntpclock.com
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feeding voltage. Connect the antenna cable to the "antenna" socket. Then configure the IP address
and other network settings of the time server through the keyboard and display menu, save and
exit, and then restart the NTP time server to make the network settings take effect. After the
restart, ping the IP address of the server on another computer to check whether the network
settings are correct. Then observe the satellite reception status, server time tracking status and
other information. When the server has locked the satellite time (the "NTP" light on the panel
turns green), NTP8010 can provide time information for other clients in the network. The specific
software configuration process can be found in the next chapter.
3. Device Operation
3.1. Indicator Light Status
Indicator
Status
Instruction
Power Supply
ON
The power supply is normal
OFF
The power supply is abnormal
NTP
OFF
The server is unlock and is searching for time source
GREEN
The time source is locked
SAT
OFF
The satellite signal is not received
GREEN
The satellite signal is received
FREQ
OFF
No back-up frequency source or OCXO is not used currently
GREEN
Back-up frequency source is working
Alarm
OFF
Normal
GREEN
CPU occupation is beyong the limite (70%)
3.2. Panel Display and Keyboard
3.2.1. The Main Panel Display
<1> The current time and date.

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<2> The current number of received satellites.
<3> The current NTP service status.
3.2.2 Keyboard Operation
3.2.2.1 Operation Instructions
Press the number keys to enter the corresponding menu and submenu. Press the OK key to enter
the menu edit mode or confirm the input. Use the direction keys to adjust the input position or flip
through pages. Press the C key to return to the previous menu. When in input mode, use the
direction keys to adjust the input position. Press the up key to escape to hexadecimal input, and
press the down key to escape to decimal point and colon input. Press the OK key to confirm. After
modifying the configuration, restart the device for it to take effect.
3.2.2. Panel Login
Press the OK key on the main interface to enter the login state. Enter the password and press OK to
confirm. After a successful login, the main menu will be displayed. The initial password is 123456.
After a successful login, the main menu will be as follows:
3.2.3. Menu Introduction and Operation
3.2.2.3.1. View and Modify Network Configuration
Press the 1 key on the main menu to enter the NETWORK menu, then press 1 key again to enter
the ethernet menu, and then press 1 key again to enter the ipv4 menu to configure the ipv4
address. Alternatively, press the 2 key to enter the ipv6 menu to configure the ipv6 address. Finally,
press the number key to enter the corresponding network card menu to view the selected network
card configuration information. After the configuration is completed, restart the device for the
configuration to take effect.
IPv4 Address Configuration
For example, press 1 to enter the NETWORK menu, then press 1 to enter the ethernet menu, then
press 1 to enter the ipv4 configuration, and then press 1 to enter the eth0 menu. The configuration
information of eth0 will be displayed as shown in the figure below:

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Press the OK key to enter the menu edit mode, where you can reset the network configuration.
The operation is as follows:
<1> Enter the IP address, and press the down key to escape to the decimal point, as shown in the
figure below:
Press the OK key to confirm. If the IP address is entered correctly, you will be prompted to enter
the subnet mask. If the input is incorrect, you will be prompted to re-enter the IP address. To enter
the subnet mask, follow the steps shown in the figure below:
<3> After confirming the subnet mask input by pressing the OK key, continue to enter the gateway,
as shown in the figure below:
<4> After confirming the gateway input by pressing the OK key, the menu will be exited. Press the
corresponding number key again to select the network card and check whether the configuration
has been successfully modified. When the modification is successful, the screen should display the
information shown in the figure below:
IPv6 address configuration
For example: Press 1 to enter the NETWORK menu, then press 1 to enter the ethernet menu, then
press 2 to enter the IPv6 configuration, then press 1 to enter the eth0 menu. If eth0 IPv6 address
has already been configured, the eth0 IPv6 configuration information will be displayed. If it hasn't

High-Performance, Enhanced Security Network Time Server
GlobalTime Electronic Co., Ltd
Floor 7, Building 4, No. 651, Wanfang Road, Minhang District, Shanghai, China / 201112
Tel: [phone] Fax: [phone]
Email: [e-mail] Website: www.ntpclock.com
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been configured yet, the setting mode will be entered directly, as shown in the figure below:
<1> Enter the IP address. Press the down key to escape to a colon. Press the up key to escape to a
hexadecimal number. Use the left and right keys to select the corresponding letter (A/B/C/D/E/F),
which will be displayed in capital letters. Press the OK key to confirm the selected character
(A/B/C/D/E/F), as shown in the figure below:
<2> Press OK to confirm. If the IP address input is correct, proceed to subnet mask input. If the
input is incorrect, a prompt will appear to re-enter the IP address. The number of subnet mask bits
can be entered as shown below.
<3> Press OK to confirm the subnet mask input, and then proceed to gateway input as shown
below.
<4> After pressing OK to confirm, you will exit the menu. Press the number key again to select the
network card and check if the configuration has been successfully modified. The following image
indicates that the modification was successful.

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3.2.2.3.2. Enabling, Disabling, and Modifying Bonding Configuration
To enable, disable, or modify bonding configuration, first enter the NETWORK menu by pressing 1
in the main menu. Then, press 2 to enter the bond menu, and then press 1 or 2 to enter the bond0
or bond1 menu to configure the bond IP address (bonding mode only supports IPv4 or IPv6, not
both at the same time). Then, follow the sub-menu sequence (1->2->3->4) to configure the
numeric bond0/bond1.
The following are the steps for each operation:
<1> Press 1 to enter the bond (0/1) open/close menu, and use the up and down keys to move the
asterisk to select the desired operation.
"close" means closing the bonding function and configuration. "open IPv4_using" means opening
the bonding function while configuring the IPv4 address, and "open IPv6_using" means opening
the bonding function while configuring the IPv6 address.
After completing the configuration, press OK to confirm. If you choose "close," the bond has
already been closed and no further action is needed. If you choose "open IPv4_using" or "open
IPv6_using," please continue with the following operations.
<2> After selecting the bonding to configure, press the 2 key to enter the bond (0/1) mode menu.
Use the arrow keys to select the bonding mode, and then press the OK key to confirm. The
recommended mode is mode1 (active-backup). Once the mode is set, proceed to the next step.
<3> Press the number 3 key to enter the bond (0/1) network menu for network configuration. The
configuration setting for this item is the same as the configuration for a regular network interface.
For details, please refer to section 3.2.2.3.1 IP configuration instructions.
<4> Press the number 4 key to enter the bond (0/1) slaves menu. Use the up and down arrow keys
to select the network interfaces that need to be added to the bonding group. Press the OK key to
indicate the selection with an asterisk (*). The number of network interfaces selected for slaves
cannot be less than 2, and network interfaces that are already used by another bond cannot be
selected again. After completing the selection, move the > symbol to the confirm option and press
OK to confirm the bonding configuration.

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<5> After completing the configuration, it is necessary to restart the device for the changes to take
effect.
3.2.2.3.3. Checking the NTP Service Status
Press the number 2 key in the main menu to enter the NTP STATUS menu and check the status of
the NTP service.
3.2.2.3.4. Checking the Satellite and Antenna Status
Press the number 3 key in the main menu to enter the SATELLITE STATUS menu and check the
status information of the satellite and antenna.
3.2.2.3.5. Viewing and Modifying the Time Zone
Press the number 4 key to enter the SYSTEM INFORMATION menu, then press the number 1 key to
enter the timezone menu. The arrow points to the current time zone, as shown in the figure
below:

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If you need to modify the time zone, use the up and down arrow keys to select the corresponding
time zone, and then press the OK key to confirm the modification of the time zone.
3.2.2.3.6. Modifying the Satellite Receiving Mode
Press the number 4 key to enter the SYSTEM INFORMATION menu, then press the number 2 key to
enter the sat mode menu. The asterisk indicates the current satellite receiving mode, as shown in
the figure below:
If you need to modify the satellite receiving mode, use the up and down arrow keys to select the
mode, press the OK key to confirm, and the system needs to be restarted for the changes to take
effect.
3.2.2.3.7. Modifying the Device Panel Password
Press the number 4 key to enter the SYSTEM INFORMATION menu, then press the number 3 key to
enter the new password menu. Modify the device panel password, which is a combination of
numbers of less than 8 digits.
3.2.2.3.8. Disabling and Enabling the SSH Service
Press the number 4 key to enter the SYSTEM INFORMATION menu, then press the number 4 key to
enter the ssh menu, and disable or enable the ssh service. The asterisk indicates the current status
of the ssh service, as shown in the figure below:

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If you need to enable or disable the ssh service, use the up and down arrow keys to select the
corresponding function, and press the OK key to confirm.
3.2.2.3.9. Viewing the System Status
Press the number 4 key to enter the SYSTEM INFORMATION menu, then press the number 5 key to
enter the system state menu. It can display the current memory usage, CPU load, and system
running time. As shown in the figure below:
3.2.2.3.10. Viewing Device Information
Press the number 4 key to enter the SYSTEM INFORMATION menu, then press the number 6 key to
enter the about menu. The device model, serial number, crystal oscillator type, firmware version,
etc. will be displayed. As shown in the figure below:
3.3. Client Configuration
For WinXP/2003, the system includes the NTP service, which can be set directly. The specific
method is as follows:
Step 1: Double-click on the time mark on the right side of the Windows taskbar to bring up the
date and time properties interface. Select the Internet Time interface, as shown in the image
below.

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Step 2: Modify the default time server for Windows, such as changing it to 192.168.2.8.
Step 3: Click "Apply", and then click "Update Now". After synchronization is successful, it will
display "Succeeded to synchronize time with ****** at year/month/day, hour:minute. Next
synchronization: year/month/day, hour:minute". By default, Windows synchronizes once a week. If
the interface displays "RPC not available", open the control panel, select Administrative
Tools/Services, search for "Windows Time" from the list of services, and select "Start service
automatically and start service".
Step 4: If you think that synchronizing once a week is too long, you can modify the registry to
shorten the synchronization interval. The specific registry item is located at:
\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NtpClient
\SpecialPollInterval The default value is 604800 = 60 × 60 × 24 × 7, which is one week. To
synchronize once a day: 86400 To synchronize once an hour: 3600 To synchronize every ten
minutes: 600
Step 5: After modifying the registry, you need to stop the Windows Time service and then restart it
so that the time interval can be updated. If you have previously installed other time
synchronization software, you need to uninstall the software and then restart the computer to
ensure that the Windows time service works properly.
For Windows 2000/98 operating systems, use our company's time synchronization software or
third-party time synchronization software. Refer to the respective user manual for specific settings.
For UNIX systems, there is usually an ntpd or xntpd daemon process. Create an ntp.conf
configuration file in the /etc directory and write "server ******" (time server IP) into the file. Then,
start the daemon process to synchronize the time.

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3.4. Server Configuration and Debugging
<1> Default Login Information Username: ntpuser Password: ntpuser2016 Username: root
Password: globaltime
<2> Console Port Login Use a serial cable to connect the server console port to the USB port on a
computer. Choose the Port port based on the actual situation, and configure it as shown in the
figure below:
<3> SSH Login The SSH service version on the server is relatively new, please use a new version of
SSH client software to log in. For example, putty0.73, SecureCRT8.5.0 or above. The SSH
connection configuration is as shown in the figure below:

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Enter the server IP address, select port 22, and choose the SSH protocol.
4. Remote Management and Monitoring
4.1. Login Information
The username and password are the same as the system, and only the root or ntpuser user can log
in.
4.2. HTTP/HTTPS Login
<1> In the address bar of the browser, enter the server's IP address, for example:
http://192.168.0.8
<2> Enter the username and password. After successfully logging in, you can view information
about the server's login user, time, configuration, status, and other information.

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You can view the current network configuration, NTP service status, satellite status, system status,
and device information.
<3> Configure the Server Basic Network Configuration Click on the Ethernet button to enter the
settings page, and select and fill in the information as shown in the figure below:
In the NAME drop-down menu, select the network interface card that needs to be reconfigured.
Choose the IPv4/6 protocol for PROTOCOL, and then enter the IP address, subnet mask, and
gateway in order. For example, enter the IPv4 configuration as follows:

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For example, enter the IPv6 configuration as follows:
Finally, click the OK button to complete the configuration operation. After the configuration is
completed, the page will be automatically refreshed to check whether the configuration
information has been successfully modified. If the modification fails, it may be due to incorrect
input information, please reconfigure it. The updated configuration is shown in the figure below,
and the configuration information has been updated:

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After successfully modifying the configuration, the device needs to be restarted to take effect.
Bonding Configuration Click on the Bonding button to enter the bonding configuration page, which
looks like this:
Select bond0 or bond1 in the NAME field.
In the SWITCH field, select the enable/disable radio button to turn on or off the corresponding
bonding function.
In the SLAVES field, select at least 2 network cards that need bonding.
In the MODE field, select the bonding mode. Modes 0-6 are available, with mode 1 (active-backup
mode) being the most commonly used.