User manual

AT-530 User Manual
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2.5.9 Audio Settings
CODEC: select the prefer CODEC; support ulaw, alaw,G729 and G7231 5.3/6.3
Signal Standard: Signal standard for different area.
Input Volume: Handset in volume.
Output Volume: Handset out volume.
Handfree Volume: Hand free volume
Handdown Time: hand down detect time.
G729 Payload Length: G729 payload length
VAD: Enable/disable Voice Activity Detection
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