Hi guys,
It was my understanding that Mitel used RFC 4733 and not RFC 2833, that is fine. However I am currently working with a SIP provider who is saying we are sending DTMF as In-Band which Mitel says they do not support and neither does the SIP carrier.
So I am left a little confused. Where can DTMF type actually be toggled within the MiVB ecosystem? The only option I've found is to alter the payload number.