Possibility 1:Network disconnection
Solution: Connect PC to the network to check if it works. Check PC for viruses or cable or network failures until PC can connect via the PING command
Possibility 2:The IP address has been occupied by other devices
Solution: Stop the connection between the IP camera and the network and connect the IP camera separately to the PC, to reset the IP address based on the recommended correct operation
Possibility 3:IP addresses are in different sub-nets
Solution: Check DVS’s IP address, sub-net mask address, and gateway settings
Possibility 4:Network physical address and IP camera conflict
Solution: Modify the physical address of the IP camera.
Possibility 5:Web port has been modified
Solution: Contact your network administrator for information
Possibility 6:Unknown
Solution: Reconnect according to RESET to default setting, default IP address is 192.168.1.120, sub-net mask is 255.255.255.0 (partial special version, default IP address is 192.168.1.88, Sub-net mask 255.255.255.0)