Edimax Technology PT-31W - Manual (Page 40)

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‘Update’ button to use the picture. Please note that there are certain
restrictions:
- Select .bmp / .jpg / .jpeg image files only.
- Image’s resolution should be less than 160 x 128, and can be
divided by 4.
- Do not upload image files that size is greater than 64KB.
When you finish with above settings, click ‘Apply’ button to save changes.
3-6 Audio
You can adjust audio input / output parameters here.
Here are the descriptions of every setup item:
Item Description
Enable
Microphone Check this box to enable microphone. If you don’t want to hear voice
from IP camera, you can uncheck this box to disable it.
Audio Type
(Microphone) The format is fixed as G.711
Microphone
Gain If the voice received by microphone is too loud or silent, you can use this
function to improve voice volume, so you can hear voice from IP camera
more clearly.
- Select -2 or -1 dB to correct the voice that is too loud;
- Select 0 dB and IP camera will do nothing on the voice;
- Select +2 dB to +26 dB to amplify the voice.