[asterisk-users] Re: Asterisk and DTMF

[Carlos Barros]

Ok, I've made some tests and resovled one of these problems.
PAP2 was configured to send a 100ms long DTMF tone and that is too
low. I changed it to 250ms and everything works fine now.
Now to the second problems, about Asterisk misinterpreting DTMF tone.
I put my sip peer into debug mode and confirmed that Asterisk is doing
things wrong, as it sends a INFO commando to my PAP2. I think if I can
change the sampling time to identify DTMF tone in zaptel driver, I can
solve it, but not sure. Is there any place I can do this??

Thanks

Carlos Barros

On 2/23/07, Carlos Barros <barros001 at gmail.com> wrote:
> Hi list!
> I have an Asterisk server (1.2.14) connected to a E1 line via a TE410P, and
> some
> PAP2NA connected to it. The PAP2 DTMF configurations is set to INFO and
> Asterisk
> to INFO too. At first, is INFO method different from RFC2833??
> Well, I have two problems. The first is that when I place a call to outside,
> via
> E1 trunk, sometimes I get some DTMF tones and I'm sure nobody hit any key.
> Seems like Asterisk is misinterpreting some voice frequencies as DTMF tones
> and is regenerating it. I think it is related to the INFO method, as
> Asterisk and/or
> PAP2 have to send it outband and the other side will generate the TONE.
> Is that right? Anyone experienced something  like this, and have resolved
> it??
>
> Ok, the second problem is that some DTMF tones I send from my phone
> (Connected to the PAP2) are not being interpreted by the other side of the
> call (generally bank systems). I had problems with it when I used inBand
> with G723, but now I use INFO method and still have the problem.
> Is my configuration right??
>
> 00:1f.0 ISA bridge: Intel Corporation 82801EB/ER (ICH5/ICH5R) LPC Interface
> Brid[general]
> bindport=5060
> bindaddr= 0.0.0.0
> srvlookup=yes
> context=default
> dtmfmode=info   ; Do this method exists in asterisk???
>
>
> Thanks!
>
> Carlos Barros
>
>
>
>
>