[Freeswitch-users] supporting multiple dtmf protocols

Brian West brian at freeswitch.org
Sun Mar 1 17:52:52 MSK 2015


Why do we keep letting these providers get away with this? Smh

On Sunday, March 1, 2015, ik <idokan at gmail.com> wrote:

>
>
> On Fri, Feb 27, 2015 at 2:50 PM, I put the Who? in Mishehu <
> mishehu at freeswitch.org
> <javascript:_e(%7B%7D,'cvml','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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>>
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>
>

-- 

*Brian West*
brian at freeswitch.org


*Twitter: @FreeSWITCH , @briankwest*
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