To allow the camera to record the video images to the SD card when there is a network disconnection between the camera and the servers.
2. During this disconnection period, the recording to the SD card shall be continuous.
3. During this continuous period of recording to the SD card, it should be First in first out when the SD card memory is full.
4. Any firmware updates should not interfere the existing function and capabilities of the cameras such as lowered bit-rate or frame rate needed in order for the feature to be working etc.