A firmware update was recently released for the NVR6XX-4KS2 series devices.

Information, instructions, and download links can be found Here

RebootingIPCam

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My IPC is off line from time to time.

  1. Check if the network environment is good and the network cable hole plug of IPC end is loose. 
  2. Check if there is IP conflict. 
  3. Check if the device is under normal power supply. 
  4. Check if the device upgraded to a wrong program.