[Asterisk-Users] DTMF and ivr systems

[Jerry Jones]

I assume you are using g711a/u?

Anything else will have issues with dtmf inband


On Jun 29, 2006, at 2:52 PM, Michael George wrote:

> On Thu, Jun 29, 2006 at 10:42:05AM -0700, Shane wrote:
>>
>> Ther's probably a simple answer to this but I've searched
>> around and haven't located anything as yet.  Is there a way
>> to have DTMF tones passed through Asterisk without it
>> messing with them?  I am using a tdm21b card and when I
>> call an ivr system from the telephone handset (routed over
>> sip or iax2) such as telebanking, the ivr has trouble
>> recognizing tones.  When I tested this with a remote party,
>> I was told tones were breaking up.  For example, a long
>> press would result in a click, some silence and a small
>> dtmf on the remote end.  Triggering a speed dial didn't go
>> well either as he heard only a few tones.  I have
>> dtmfmode=inband in sip.conf and have tried relaxdtmf=yes in
>> zapata.conf.
>>
>> I realize Asterisk does need to detect dtmf for things like
>> call parking but can it just pass the audio to the other
>> side with no regard for whether it's dtmf digits?  IE. long
>> press results in long tone, etc.
>
> We've run into some problems with * and dtmf.  *Usually* dialing the
> digits more slowly will help.  It seems to be worse with some SIP
> devices than others.  But when calling from my handset on an FXS to  
> my *
> system which goes IAX2 to another * system and then out a VoIP service
> line, I can dial as fast as my fingers can go and never miss...  snoms
> and sipuras on the latter system can have trouble if we dial too
> quickly...
>
> -- 
> -M
>
> There are 10 kinds of people in this world:
> 	Those who can count in binary and those who cannot.
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