[Asterisk-Users] Re: Ignoring Incoming RFC2833 DTMF?

[Rusty Dekema]

I should add that I am using ulaw (g.711u) for all calls.

-Rusty

On 11/3/05, Rusty Dekema <rdekema at gmail.com> wrote:
>
> Does anyone know if it is possible to configure Asterisk in such a way
> that it will ignore RFC2833 DTMF signals received from a SIP peer?
>
> I am using Broadvoice for some DIDs at the moment and their system has a
> tendency to mis-interpret DTMF digits, especially ones dialed from mobile or
> office (digital) phones. Basically, it will catch every digit dialed and
> send it to my Asterisk system, but unfortunately it frequently seems to
> repeat digits. That is, if I call into my system and want to enter a
> password of "123456789", Broadvoice will send something to my Asterisk
> machine such as "11234556789" or "12345567889".
>
> I have set dtmfmode=inband in both [general] and [sip.broadvoice.com<http://sip.broadvoice.com>]
> in sip.conf, but from viewing the results of 'rtp debug', it appears that
> Broadvoice is still sending me the digits via RFC2833. I was thinking that
> if I could get Asterisk to ignore this and just detect the DTMF tones
> inband, that it might do a better job than Broadvoice's system.
>
> If anyone knows how to do this, or has any other suggestions, I will be
> very glad to hear them. This problem has been driving me nuts. I am very
> satisfied with Broadvoice's voice quality, and I have a good network
> connection between my location and their SIP gateway, but more-or-less
> correct DTMF detection is fairly important for me and it basically does not
> work; but I really don't want to have to switch to using POTS lines for all
> inbound calls.
>
> Thanks,
> Rusty
>
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