[asterisk-users] Background / Invalid Extension through cell phone

[Steve Totaro]

> >> I have found that relaxdtmf=yes has caused more problems than it
> >> fixes.  In my experience problems with detecting DTMF on an FXO
port
> >> can usually be fixed by playing with rxgain and txgain.
> >>
> > What sort of problems have you seen it cause?  I guess I could see
> > hitting the wrong extension in rare cases.  Anyways, relaxdtmf has
> > worked wonders for me over T1s and analog lines (always seems to be
cell
> > phones that have issues, probably because of the GSM and radio
distorts
> > beyond the specs).
> 
> It caused asterisk to see a single digit when two of the same digits
> were dialed in a row.  So a user dialed 4415 and Asterisk saw 415.
> Remember that on all cell phones (except the analog ones) DTMF from
the
> phone is sent out of band and so should not be distorted.

Good points.  So I wonder why callers with DTMF issues are usually cell
callers.  The only person I know with an analog phone anymore is my
mother :-)

Thanks,
Steve