HIKVISION DS-6900UDI User Manual page 23

Step 2 Configure the time synchronization by NTP server or manually.
 Configuring Time Synchronization by NTP Server
A Network Time Protocol (NTP) Server can be configured on your device to ensure the
accuracy of system date/time.
If the device is connected to a Dynamic Host Configuration Protocol (DHCP) network that
has time server properties configured, the camera will synchronize automatically with the
time server.
Enable the NTP function by selecting the radio button, and configure the following
settings:
NTP Server: IP address of NTP server.
NTP Port: Port of NTP server.
If the device is connected to a public network, you should use a NTP server that has a time
synchronization function, such as the server at the National Time Center (IP Address:
210.72.145.44). If the device is set up in a more customized network, NTP software can be used to
establish a NTP server used for time synchronization.
 Configuring Time Synchronization Manually
HD Video and Audio Decoder User Manual
Figure 4-5 Configure Time Settings
Figure 4-6 Configure Time by NTP
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DS-6900UDI Decoder User Manual