User Manual of Network Video Recorder 
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9.2.7  Configuring Multicast 
Purpose: 
The multicast can be configured to realize live view for more than 128 connections through network for the device. 
A multicast address spans the Class-D IP range of 224.0.0.0 to239.255.255.255. It is recommended to use the IP 
address ranging from 239.252.0.0 to 239.255.255.255. 
Steps: 
1.  Enter the Network Settings interface. 
Menu >Configuration> Network 
2.  Select the More Settings tab to enter the More Settings interface, as shown in Figure 9. 16. 
3.  Set Multicast IP, as shown in Figure 9. 17. When adding a device to the Network Video Surveillance 
Software, the multicast address must be the same as the NVR’s multicast IP. 
 
Figure 9. 17 Configure Multicast 
 
4.  Click the Apply button to save and exit the interface. 
 
The multicast function should be supported by the network switch to which the NVR is connected. 
9.2.8  Configuring RTSP 
Purpose: 
The  RTSP  (Real  Time  Streaming  Protocol)  is  a  network  control  protocol  designed  for  use  in  communication 
systems to control streaming media servers. 
Steps: 
1.  Enter the Network Settings menu 
Menu >Configuration> Network 
2.  Select the More Settings tab to enter the More Settings menu, as shown in Figure 9. 16. 
 
Figure 9. 18 RTSP Settings Interface 
 
3.  Enter the RTSP port in the text field of RTSP Service Port. The default RTSP port is 554, and you can 
change it according to different requirements. 
4.  Click the Apply button to save and exit the menu.   
9.2.9  Configuring Server and HTTP Ports 
Purpose: