Q-See QC40198 - Manual (Page 89)

WEB OPERATION
QC40198 User Manual
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Refer to Figure 7-15 for main stream and extra stream switch information.
Figure 7-15
Open All
You can click it to open all channels.
Refresh
You can use button to refresh camera list.
Start Dialogue
You can click this button to enable audio talk. Click
【▼ 】 to select bidirectional talk mode. There are two options:
DEFAULT/G711a.
Please note, the audio input port from the device to the client-end is using the first channel audio input port. During
the bidirectional talk process, system will not encode the audio data from the 1-channel.
Local Play
The Web can playback the saved (Extension name is dav) files on the PC-end.
Click local play button, system displays the following interface for you to select local play file. See Figure 7-16.
Figure 7-16