I thought I sent this earlier this week, but I didn't see it. If I
missed it, I apologize for the resend.
We are running asterisk 1.2.2 with a TDM04B connected to PSTN lines. On
incoming calls from cellphones located overseas, DTMF is not recognized
- we have many single-digit choices in our menu so the problem isn't
that some digits aren't working, it's not listening at all. Works fine
from domestic landlines and cellphones and from overseas landlines.
I know the cellphones don't have a problem with DTMF, they work with
other IVRs. I've placed overseas calls (I'm currently in a different
country from the asterisk machine) from both landlines and cellphones,
and can't hear a difference in quality.
Could playing with rxgain help? Is there any chance that I could cause
the calls that don't have a problem to either be too loud or get
distorted due to clipping?
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