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

[Stefano Finetti]

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