asterisk users - Jun 2010 - Asterisk 1.6 (and 1.4) DTMF problems using RFC2833

We are experiencing intermittent DTMF problems here, with the following
setup:

ITSP -> PIX -> Asterisk (g729, RFC2833 for DTMF).

I am running Ubuntu server 10.04, but Asterisk is compiled by us and not
installed from the software repository.  Essentially, DTMF works for some
time, but at some point it simply stops and the point at which it stops
appears to be random.

Using RTP debug, I can verify that the RFC2833 DTMF is being delivered in
the RTP stream, and Asterisk knows of it.  Independently, wireshark confirms
the same.  I can't easily remove the PIX, but as the RTP is showing the DTMF
I do not believe the firewall is an issue.

Our ITSP is registered as a SIP provider, and we can receive calls just
fine.  I've attached a file containing portions of the asterisk log, the
wireshark log and the dialplan.

Has anyone else run into this situation?

Best Regards,
Mark Deneen
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El 29/06/10 15:28, Mark Deneen escribi?:
> We are experiencing intermittent DTMF problems here, with the 
> following setup:
>
> ITSP -> PIX -> Asterisk (g729, RFC2833 for DTMF).
>
> I am running Ubuntu server 10.04, but Asterisk is compiled by us and 
> not installed from the software repository.  Essentially, DTMF works 
> for some time, but at some point it simply stops and the point at 
> which it stops appears to be random.
>
> Using RTP debug, I can verify that the RFC2833 DTMF is being delivered 
> in the RTP stream, and Asterisk knows of it.  Independently, wireshark 
> confirms the same.  I can't easily remove the PIX, but as the RTP is 
> showing the DTMF I do not believe the firewall is an issue.
>
> Our ITSP is registered as a SIP provider, and we can receive calls 
> just fine.  I've attached a file containing portions of the asterisk 
> log, the wireshark log and the dialplan.
>
> Has anyone else run into this situation?
>
> Best Regards,
> Mark Deneen
I've experienced a similar DTMF issue with recent asterisk 1.4 versions 
(1.4.32, 1.4.33.1), I'm not sure about 1.6.2.X. What happens here is 
that the DMTF activated features, like disconnect (default *) or blind 
transfer (default #) stops working after a while. Agents are able to 
transfer or hangup a few calls and then it stops working. Doing some 
debugging I could see that asterisk knows (receives) the DMTF too but 
the features are not triggered...

Anyone else has run into this?

Regards,

-- 
Ing. Miguel Molina
Grupo de Tecnolog?a
Millenium Phone Center