Dahua DH-XVR54 L-I2 Series User Manual page 163

Configure the alarm input settings from the offline IPC.
Click Apply to complete the settings.
Click Default to restore the default setting.
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Click Copy to to copy the settings to other channels.
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5.10.2.5 Configuring Alarms from HDCVI Devices
Select Main Menu > ALARM > Alarm-in Port > HDCVI Alarm.
CAM offline
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User's Manual