[Freeswitch-users] supporting multiple dtmf protocols

[ik]

On Fri, Feb 27, 2015 at 2:50 PM, I put the Who? in Mishehu <
mishehu at freeswitch.org> wrote:

>  I see after all these years it's still the popular thing to think that
> Bezeq is the most terrible thing in the world.  :-)  Be thankful you don't
> have to deal with some American incumbent providers...  Bezeq can be a walk
> in the park...  :-)
>

You mean like answering with 200 OK on INVITE, getting 404 instead of
"authentication require", dropping requests because I offer both Alaw and
Ulaw and other horror stories around other SIP providers that I have worked
with ? :P


>
> DTMF handling can be a fun little source of headache in general.
>
> To clarify, are you saying that midway through a call that the DTMF mode
> changes?  Or are you saying that the DTMF mode for one call may be 2833 and
> the next call can randomly be inband audio?  If you are saying that the
> mode changes during the call, what indication do you receive that this has
> happened?
>

Different types of payloads in RTP, you can see it also in wireshark when
capturing with tcpdump




>
> You can try the "liberal-dtmf" setting and see if that fixes the issue for
> you, but I believe that only allows SIP NOTIFY and 2833, and I don't
> believe it handles inband.  (Hopefully somebody else will correct me if I'm
> mistaken.)
>

I'll try this
Thank you

Ido


> --
> Yossi Neiman
>
> On 02/27/2015 05:08 AM, ik wrote:
>
>     Hello,
>
>  I have the misfortune of forced to use a telco named Bezeq - the biggest
> telco in Israel.
>  The SIP trunk they provide is very problematic.
>
>  The one that I cannot overcome is that sometimes doing the call, it
> switches DTMF between Inband and rfc2833, and sometimes the whole DTMF
> sending is either inband or rfc2833 doing the entire call.
>
>  I cannot make them to be more stable in this matter (I have tried talking
> with them), and I cannot replace them (I have tried to do so as well).
>
> How can I deal with such mess ?
>
>  Thanks,
> Ido
>
>
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