This may be what you need:

http://www.misdn.org/index.php/FAQ#Why_are_my_dtmf_tones_not_detected_everytime.3F

Also, something here may be helpful:
  http://www.voip-info.org/wiki/view/Asterisk+DTMF#Troubleshooting

-jr

On Nov 6, 2007 2:12 PM, Hans Witvliet <[EMAIL PROTECTED]> wrote:

> Hi all,
>
> Perhaps someone can give me a hint i  the right direction...
>
> Sometimes dtmf is recognized, sometimes not.
> I'm using 1.2.19 asterisk with misdn for my hfc card.
> When i got in incoming sip-call, dtmf is recognized,
> When i phone my self (isdn-phone or gsm-phone) no problem with dtmf
> When SOME (not all) people phone me (isdn-incoming) DTMF is not
> recognized.
> How come?
>
> Either it works for a particular configuration, or it doesn't.
> It doesn't make sense to me that it works sometimes...
>
>
-- 
Josh Richards - Grover Beach, California US
[EMAIL PROTECTED] (don't forget the middle 't' initial when writing)
http://blog.joshrichards.org/
805/471-6923 (cell)

Geek Research (Technology Management Consulting) -
http://www.geekresearch.com/

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