[Asterisk-Users] DTMF modes and external IVR systems over ISDN

[James Sizemore]

Tones are to short.

Stefano Finetti wrote:

>Mark,
>
>I'm now able to send proper DTMF tones checking on the isdn driver and using
>"rfc2833" as dtmf mode for sip.conf and phones.
>
>But there is a question that i think only you can check and answer:
>
>Why * often when calling via outside line some number that has IVR systems,
>doesn't recognize the answer?
>
>It stays there, waiting, even if i'm sure the other side of the line has
>answered the call (tried in the same time from * and using my mobile phone).
>
>I can't figure out what kind of problem can be, I encountered it in many *
>installation...
>
>--
>Stefano Finetti
>
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