[Blink] DTMF not supported

Adrian Georgescu ag at ag-projects.com
Thu Jul 22 00:29:43 CEST 2010


What codec do you use?

"Tomasz Muszynski" <thom at union.waw.pl> wrote:

>Ok, I've checked again and it seems that my provider recognizes DTMF's from Blink (with and without Inband set), but with problems. I have to press digit many times to be recognized - sometimes it works quite ok, but most time it's not recognizing any digits, even after hundred of key presses (that's why I was thinking that it's not working).
>
>I'm not sure, but I think that DTMF signal may be to short. Is it possible to make it longer? Ideally, according to classic phones, DTMF signal should generated be as long as key is pressed.
>
>It's not remote problem, because from X-Lite it's working ok (it sends DTMF signals as long as key is pressed).
>
>Regards,
>Tomek
>
>Wiadomość napisana przez Adrian Georgescu w dniu 2010-07-20, o godz. 18:16:
>
>> DTMF using INFO method is obsolete. It will not likely be built into Blink.
>> 
>> Regards,
>> Adrian
>> 
>> 
>> 
>> On Jul 20, 2010, at 4:21 PM, Tomasz Muszynski wrote:
>> 
>>> Wiadomość napisana przez Saúl Ibarra Corretgé w dniu 2010-07-20, o godz. 15:53:
>>>> On 20/07/10 15:45, Tomasz Muszynski wrote:
>>>>> See here :)
>>>>> 
>>>>> http://www.voip-info.org/wiki/view/SIP+Info+DTMF
>>>>> 
>>>>> I have also a hardware SIP gateway and there are three possible settings for DTMF: SIP INFO, RFC2833 and RELAY - only the last one works for me.
>>>>> 
>>>> 
>>>> Blink supports sending DTMF tones in two ways: RFC2833 and Inband. In order to use inband (DTMF sent in the RTP stream) you'll need to use a codec which doesn't compress the audio, such as pcma or pcmu.
>>> 
>>> I'm using pcma and either RFC2833 and Inband are not working for me - I've checked this several times.
>>> 
>>> Regards,
>>> Tomek
>>> 
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