So let me explain what I’m doing.
I want to send a sequence of DTMF digit (e.g ###). So I call three time the PlayDTMF action for every digit.
In the wireshark trace I see that the DTMF digits are sent with the RTP EVENTs. Every DTMF digits is transmited in round about 100ms. This is shorter than the inband DTMF time. I’m not so familiar with the RFC2833/4733 but I think that is okay.
But I did not see a pause between the first and the second DTMF digit. The second and third digit is transmitted immediately after the digit before.
Is a pause between the DTMF digits necessary?
Does the gateway (PSTN) insert the pause between the inband DTMF digits?
I hope you understand my question.