QNAP Security VioStor NVR (Version: 3.5.1) - Manual (Page 191)

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Note:

All the settings will be effective after clicking ‘Apply’. When applying the changes, the
current recording process will stop for a while (maximum 1 minute) and then restart.

To avoid blocking by the firewall, the IP cameras or the video servers configured for
alarm recording must be located on the same subnet as the NVR.

To switch from traditional mode to advanced mode, select ‘Advanced Mode’ and click
‘Go to the settings page’.