Digital Video Recorder User Manual 
 
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Figure 12-13 NTP Settings Interface 
Step 3 Check the Enable NTP checkbox to enable this feature. 
Step 4 Configure the following NTP settings: 
  Interval: Time interval between the two synchronizing actions with NTP server. The unit is 
minute.   
  NTP Server: IP address of NTP server. 
  NTP Port: Port of NTP server. 
Step 5 Click the Apply button to save and exit the interface.   
   
The time synchronization interval can be set from 1 to 10080 minutes, and the default value is 60 
minutes. If the DVR 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 DVR is set in a more customized network, NTP software can be used to 
establish a NTP server used for time synchronization. 
12.2.5 Configuring NAT 
Purpose 
Universal Plug and Play (UPnP™) can permit the device seamlessly discover the presence of other 
network devices on the network and establish functional network services for data sharing, 
communications, etc. You can use the UPnP™ function to enable the fast connection of the device 
to the WAN via a router without port mapping. 
Before you start 
If you want to enable the UPnP™ function of the device, you must enable the UPnP™ function of 
the router to which your device is connected. When the network working mode of the device is set 
as multi-address, the Default Route of the device should be in the same network segment as that 
of the LAN IP address of the router. 
Step 1 Enter the Network Settings interface. 
Menu > Configuration > Network 
Step 2 Select the NAT tab to enter the UPnP™ Settings interface.