Dahua HDCVI series, User Manual

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Figure 4-175
The audio file can be saved on the HDD or on the USB device.

In Figure 4-174, when it is HDD mode, the newly added audio file can be saved on
the HDD automatically. You do not need to connect to the USB device if you want to
use it the next time.

In Figure 4-174, when it is USB mode, after you imported, you need to connect the
USB device all the time; otherwise, the audio link function may fail. So, if you want to
use the audio trigger function, please make sure the audio file is on the UBS device
and the USB device has connected to the DVR before the DVR boots up. You need to
make sure the USB device connection is always there if you want to manage and use
the audio file function.

If there is a USB device (containing the audio file) and the HDD (containing the audio
file) at the same time, the HDD mode has higher priority. That is to say, DVR uses the
audio file from the HDD.
4.11.5.8 Account
Here is for you to implement account management. See Figure 4-176. Here you can:

Add new user

Modify user

Add group

Modify group

Modify password.
For account management please note:

For the user account name and the user group, the string max length is 6-byte. The
backspace in front of or at the back of the string is invalid. There can be backspace in
the middle. The string includes the valid character, letter, number, underline,
subtraction sign, and dot.