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(1) Check whether the audio input type is selected correctly. The default audio input of the
external passive mic model is MicIn. If the external active audio is used, it needs to be set to
LineIn;
(2) Adjust the audio input volume value through IE, and check whether it is too low;
(3) The back-end sound playing unit must be an active speaker;
6.7 Alarm Failure
6.7.1 no alarm output
Troubleshooting steps:
(1) Confirm that the input and output signal wiring mode of the alarm is correct, ensure that the
signal is the switch signal, and do not connect the wiring wrongly or falsely;
(2) Check whether the port setting of the network video server is correct and whether the
enabling setting of the input and output ports is correct through IE;
(3) Confirm whether the alarm input and output equipment is normal;
6.8 Parameters does not take effect after settings
6.8.1 abnormal power off after parameter setting
Possible cause: parameters can be saved normally only after 1 minute of setting, unless automatic
restart or IE click [system restart], abnormal power failure, etc. may cause parameters not to be saved
normally.
6.8.2 failure to restart the system as required
Possible cause: some parameters have been changed. You need to restart the system, otherwise it
may not take effect.
6.9 Others
6.9.1 the capacity of the used U disk computer on the camera becomes smaller
Possible cause: when the camera formats the U disk and micro SD card, special partition operations
are carried out, resulting in part of the capacity cannot be recognized on the computer. If you want to
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