The LILIN L series camera's that are being powered by locally powered (please note this feature does not work with PoE camera's) have the ability to offer network loss redundancy when an SD card is fitted.
To configure this option please follow the below steps:
Log in to the network browser of the camera. Select the configure option, then select SD card. Once on this screen simply tick the 'No Network Activity' option.
Please note this will not work with PoE powered camera's because i loss of network connectivity would result in a loss of power being provided to the camera.