DVR to modem connection issue

Since the equipment swap didn’t solve it and we suggested it might be due to too many connected devices, you could consider using a network monitoring tool to check for device traffic overloads or spikes that might coincide with the resets.

If you haven’t already, you might also try isolating the DVR on its own Ethernet connection, ensuring that no other devices are sharing the same port on the modem. Another option could be upgrading to a higher speed or more advanced router/modem model to handle more devices simultaneously. However, I understand it might not fully address the issue if it’s more complex.