[Asterisk-Users] DTMF and ivr systems

[Marco Mouta]

Hope this could help,

Please note Inband DTMF won't work unless the codec is ulaw or alaw
(G711). Use out of band DTMF aka rfc2833 or info.

http://www.voip-info.org/tiki-index.php?page=Asterisk+sip+dtmfmode

best regards,
Marco Mouta

ps.give me some feedback if it worked

On 6/29/06, Shane <shane-asterisk at cm.nu> wrote:
> Hello,
>
> 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.
>
> Best,
> Shane
>
>
> --
> http://www.cm.nu/~shane/
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-- 
Com os melhores cumprimentos,

Marco Mouta