DTMF Mode

The DTMF mode is a setting that governs how Dual Tone Multi Frequency signalling is to be performed.

Mode	Description
Compatibility	Use RFC2833 by default but switch to inband when reciever does not support RFC2833.
RFC2833	Send DTMF information as RTP messages.
SIP INFO	Send DTMF information as SIP messages.
Inband	DTMF tones are generated by the calling device.