Network Video Recorder User Manual
93
2) ActiveX Control is blocked.
3) DirecetX8.1 (or later) is not installed. Please upgrade the graphic driver.
4) Network connection failure.
5) Network settings problem.
6) User name or password is incorrect.
7) The client version does not match the version of NVR program.
Q15. There is mosaic or no image during preview and playback over the network.
Possible Reasons:
1) Bad Internet connection.
2) Limitation of NVR resources.
3) Channel protection or privacy mask has been set.
4) This user does not have the corresponding permission.
5) NVR own output is relatively weak.
Q16. Internet connection is unstable.
Possible Reasons:
1) Network instability.
2) IP address conflict.
3) MAC address conflict.
4) The network card of PC or NVR is not working.
Q17. Backup error
Possible Reasons:
1) DVD writer and HDD are connected to the same cable.
2) CPU takes up a large number of resources. Please stop recording first before
backup.
3) The data size is larger than the capacity of backup device.
4) The backup devices are incompatible.
5) The backup device is damaged.
Q18. Why can't cancel the alarm signal?
Possible Reasons:
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