QNAP Security VioStor NVR (Version: 3.5.1) - Manual (Page 176)

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6.4.4 UPS
The NVR supports UPS (uninterruptible power supply). When an expected power outage
occurs, the UPS is able to supply the power to the NVR continuously. Configure the
settings to turn off the NVR after the AC power fails. If the power of the UPS is insufficient
to last for the time specified, the NVR will shut down immediately for optimized server
protection.
* It is recommended to connect the UPS to one of the USB ports on the rear side of the NVR.
Enable UPS Support
Select this option to enable the UPS support. Enter the time the NVR should wait before
shutting down after the AC power fails. In general, the UPS can supply the power for 5-10
minutes when AC power fails depending on the maximum load and the number of
connected devices.
UPS Model
Select the UPS model on the list. If the UPS is not available on the list, please contact the
distributor or QNAP technical support.
IP Address of UPS
If ‘APC UPS with SNMP Management’ is selected, enter the IP address of the UPS.
Note: It is recommended to use APC Smart-UPS 700+ APC Network Management Card.