Who am I?  My name is Eric.  I have a problem.  I am on the road to
recovery...

Yes, I am responsible for RFC 4722, which, as a side effect, instructs
people on the THEN state-of-the-art (pre-SUB/NOT) of how to transport user
stimulus that HAPPENS to be key presses on a key pad using INFO messages.

As a side note, 90% of the time, we are really talking about real DTMF
detection, extracted from G.711, at a media server.

I am also responsible for RFC 4730, KPML, which instructs people on the
CURRENT state-of-the-art of how to transport user stimulus using SUBSCRIBE
and NOTIFY.

Note the key [sic] phrase: "transport user stimulus."

There were some suggestions to use RFC 2833 / 4733 to transport DTMF.  I
would offer, if your goal is to TRANSPORT IN-BAND TONES THAT HAPPEN TO BE
DTMF, your ONE and ONLY ONE option is RFC 4733.  You are *transporting*
media; use a media transport protocol.

If your goal is to TRANSPORT USER *SIGNALING*, your ONE and ONLY ONE option
is RFC 4730, KPML.  We have seen tons and tons of reasons why INFO is "bad."
I would offer that INFO is simply underspecified.  Namely, the remedy is to
fix the "why am I getting this message and what am I supposed to do with it"
question.  Event: and Content-Type: do this for NOTIFY.  A similar mechanism
could be done for INFO (note the deliberate use of passive voice).

Since we do not seem to have pressure to add those facilities to INFO, I
would offer we get on with life.


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