An enum that represents the different DTMF event that can be sent to a
#FsSession. The values corresponds those those defined in RFC 4733
The rest of the possibles values are in the IANA registry at:
http://www.iana.org/assignments/audio-telephone-event-registry
An enum that represents the different DTMF event that can be sent to a #FsSession. The values corresponds those those defined in RFC 4733 The rest of the possibles values are in the IANA registry at: http://www.iana.org/assignments/audio-telephone-event-registry