62 
 
5.  Configure NTP settings: 
• Synchronize Every: Time in minutes to synchronize with NTP server. 
• NTP Server: IP address of NTP server. 
6.  Click OK to save settings and exit the NTP Settings menu.   
 
Note:
 Time synchronization interval has a range of 0-10080ms, normally 7200ms. If the DVR is used on 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 setup in a more customized network, NTP software can be used to 
establish a NTP server used for time synchronization.   
Remote Alarm Host Settings 
With a remote alarm host set, the DVR will send a signal to the host when an alarm is triggered. The remote alarm host 
must have the Network Video Surveillance software installed.   
 
To set up a remote alarm host: 
 
1.  Enter Network settings menu by clicking Menu > Setting > Network. 
2.  Select the Advanced tab. 
3.  Click the Set butt next to Host/Others to enter the Host/Others menu, as shown in Figure 9. 
 
 
 
Figure 9. Host/Others Menu 
 
 
4.  Enter Alarm Host IP and Alarm Host Port. Alarm Host IP is the IP of the remote PC which has the 
Network Video Surveillance software installed. The Alarm Host Port must be the same as software’s 
alarm monitor port (default port is 7200). 
Configuring Multicast 
Setting up multicasting solves limitation issues when streaming videos through a network access device. A multicast 
address spans the Class-D IP range of 224.0.0.0 to 239.255.255.255. It is recommended to use the IP address range 
from 239.252.0.0 to 239.255.255.255.   
 
To set up multicast: 
 
1.  Click Menu > Setting > Network to enter the Network Settings menu. 
2.  Select the Advanced tab.