Denwa Communications DW-610G User Manual page 63

Tone Standard
EnableVAD
DTMF Payload Type
8.3.4.2 FEATURE
In this web page, you can configure Call Transfer, Call Waiting, 3 Ways Call, Black List,
white list Limit List and so on.
Select Tone Standard.
Select it or not to enable or disable VAD. If enable VAD,
G729 Payload length could not be set over 20ms.
Set DTMF Payload Type.