Dahua Technology DH-XVR1B04-I - 7 FAQ; 1. DVR cannot boot up properly.; 2. DVR frequently shuts down or stops running.; 3. Hard disk cannot be detected.

User’s Manual
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Install certificate
Step 3 Click Browse to select the certificate that you want to install.
Step 4 Click Import.
5.19.5 Audio/Video Encryption
The device supports audio and video encryption during data transmission.
Step 1 Select
Main Menu > SECURITY > A/V Encryption > Audio/Video Transmission.