This is precisely an example of confusing signaling with tone transport.
If you plan on regenerating tones based on receiving signaling
(KPML->Q.23 or INFO->Q.23) then you are abusing signaling.  You should
be using RFC 4733. 

-----Original Message From: Hadriel Kaplan
[snip]
...what to do with in-audio tones.  I *think* the answer is info-dtmf
should trump 2833 - i.e., if you negotiated info-dtmf only do that, for
a variety of reasons; but with delayed SDP offers that would mean you'd
always end up using info-dtmf when you could have done 2833 instead.
And I can see the argument for "do both", and that's what kpml did
except it has the suppression/<pre> concept, but I assumed that was due
to pattern matching being inconsistent with in-band event sending
one-at-a-time.  But I still think info-dtmf trumping would be right,
because the tones will get to the far end if they should.
[snip]

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