[Asterisk-Users] DTMF inband detection improvement

[Mark Eissler]

On Feb 16, 2005, at 10:01 AM, Peter Svensson wrote:

> On Wed, 16 Feb 2005, Steve Underwood wrote:
>
>> If you really are using ulaw, and you do not have extreme packet loss 
>> or
>> jitter, DTMF detection should be very reliable. It is no better in CVS
>> HEAD because it wasn't broken in the first place.
>
> We have some problems with dtmf detection on our lines. We use E1 pris
> connected to a TE405P. Mostly we see duplicated digits. Unless the 
> signal
> is perfect and distortion free Asterisk sees the small imperfections as
> the end of the digit.
>
> We can provoke this problem from some of our office phones (when on
> speaker phone). Asterisk is more or less the only place we see this
> problem.
>

I concur. I have DTMF problems with inbound calls over IAX. Don't have 
any DTMF problems locally using g.711. I also have problems with 
inbound calls from GSM phones but hey, that's not a surprise and yes, 
if you dial reallllly slow then it seems to work more reliably.

BTW, Steve, if you're still reading, what is the RADIO_RELAX option 
intended to be for in dsp.c?

-mark

--
Mark Eissler, mark at mixtur.com
Mixtur Interactive, Inc. - at - http://www.mixtur.com