Sanyo VCC-HD2500 Manual page 123

You cannot select "ON" in [DIGITAL PTZ] if you selected "H.264" in [CODEC].
Selecting "ON" in [DIGITAL PTZ] fixes the [RESOLUTION] value to a VGA-equivalent size ("640×
360" in 16:9 aspect ratio or "640×480" in 4:3 aspect ratio).
Audio condition configuration
In [MIC SENSITIVITY], select the microphone sensitivity.
In [FILTER (500Hz)], enable or disable the audio filter.
In [OUTPUT LEVEL], select the desired audio output level.
Audio output configuration
Set [AUDIO (CAMERA TO PC)] to "ON" on the CLIENT SETTINGS screen.
Audio input configuration
Set [AUDIO (PC TO CAMERA)] to "ON" on the CLIENT SETTINGS screen.
Quick Operation Guide 5/13