To elaborate:
There is no standard for DTMF over INFO.
The usages that exist in the wild are *proprietary* though you may find
some commonality. If you need to use this to interoperate with
something, do whatever your peer expects.
Thanks,
Paul
Avasarala Ranjit-A20990 wrote:
>
This is a very clear and comprehensive answer, indeed. Thank you very much. The
comparison to the port settings is very suggestive!
For me, this clarification adds the last piece to the puzzle.
No surprise that "interoperability" is such a big issue in SIP, although the
RFCs are very well writt
