AW: [Asterisk-Users] DTMF detection when outgoing call to mobilephones

[Marc Scheuffler]

Yes I can hear the DTMF keys. I ve tried 2 different phones and 3 different mobile network providers. Nothing.

I played with the rx/txgain values from hearing nothing to too loud... 
I have no more ideas.

Marc 

-----Ursprüngliche Nachricht-----
Von: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] Im Auftrag von Steve Underwood
Gesendet: Donnerstag, 4. Mai 2006 17:00
An: Asterisk Users Mailing List - Non-Commercial Discussion
Betreff: Re: [Asterisk-Users] DTMF detection when outgoing call to mobilephones

Marc Scheuffler wrote:

>Hi all,
>
>I am trying to detect DTMF keys from a mobile when asterisk make an 
>outgoing call to the mobile.
>
>The DTMF detection on incoming calls (also FROM mobiles) is working 
>very well.
>The only problem is if asterisk called the phone... Nothing is detected.
>
>I am using a digium te205p with PMX/PSTN connection.
>
>Everything that I can find in forums are problems with dtmf detection 
>on SIP.
>
>Any suggestions?
>  
>
Can you hear DTMF tones from the cellphone when you call it? It is possible they are not produced. I'm not sure if that is a handset or network issue, but I had this happen a few years ago when implementing an IVR that called subscribers for notification, and expected input from them. Most of the time it worked, but some phones in some locations sent nothing. If the phone made a call from the same location there was no problem.

Steve

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