Grandstream Networks GXW-410x User Manual page 21

DTMF Method
No Key Entry
Timeout
Grandstream Networks, Inc.
This parameter specifies the mechanism to transmit DTMF digits. There
are7 modes supported: in audio which means DTMF is combined in audio
signal (not very reliable with low bit-rate codec), via RTP (RFC2833), or via
SIP INFO. Multiple DTMF transmission schemas can be selected.
1 – in-audio
2 – RFC2833
3 – in-audio and RFC2833
4 – SIP Info
5 – in-audio and RFC2833
6 – SIP Info and RFC2833
7 – in-audio, RFC2833, and SIP Info
Default is 4 seconds.
GXW-410x User's Manual
Firmware 1.0.0.32
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