SVR-632U/S User Manual
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Finally, click "OK" to begin playing. The player should now play the
backed up file.
UPS Configuration
Connect the UPS to the NVR's USB port for sending and receiving
signals between the UPS and the NVR. The NVR can receive signal
from the UPS when there is a power failure and shut down itself
automatically within a period of time. You can enable UPS support to
prevent data loss when an unexpected power failure occurs.