If the device can’t work properly after parameters modification (typical case: after modifying the IP address which makes network un-accessible to the device), you can restore the factory settings to the default parameters.
Two Ways of Restore Factory Settings:

• In Web page, select “System Setup”> “Restore”.

• RESET Button: Press the reset button at the bottom of the device and hold the for more than 5 seconds. The device will be restored to the factory settings. Restoring the factory settings will lead to a hard reboot and the reboot process will take approximately one minute.