[Freeswitch-users] Skypiax: not able to detect "Inband" dtmf tones from pstn call?

[Giovanni Maruzzelli]

It is probably because mod_skypiax does not analize incoming audio
looking for dtmf, because the "normal" call from a Skype client peer
sends *both* inband and out of band (signaling) dtmf.

So, I choose to only detect out of band (signaling) dtmfs, and ignore
possible inband dtmfs (in the audio flow), so to have the most
reliable source (signaling) and spare cpu (not analizing the incoming
audio).

Never tought you can receive calls from skypeIN with inband dtmfs...

Open a Jira for this, I'll think about.

Also, let me know your toughts...

-giovanni




On Tue, Dec 22, 2009 at 3:57 PM, Scott Torr
<scott.torr.fs at letterboxes.org> wrote:
> ubuntu-8.04.3-server-amd64.iso (update/upgrade)
> FreeSWITCH Version 1.0.trunk (15787)
> skype-ubuntu-intrepid_2.1.0.47-1_amd64.deb
> mod_skypiax
>
> (POTS)-->(PSTN)-->(skypeIN)-->(skype_client)-->(skypiax)-->(fs)
>
> <extension name="Indial_to_fs_via_skypeIN">
>  <condition field="destination_number" expression="^501$">
>    <action application="start_dtmf" />
>    <action application="record_session"
>    data="/root/recordings/${strftime(%Y-%m-%d-%H-%M-%S)}_${destination_number}_${caller_id_number}.wav"/>
>    <action application="playback" data="/root/Hello_16000.wav" />
>  </condition>
> </extension>
>
>
> fs>console loglevel 7
>
>
> If I dial 501 from from a sip phone using "inband" dtmf I can see the
> dtmf tones being detected and decoded by fs in the debug log.
>
>
> If however I use a pstn phone and dial my skypeIN telephone number the
> call comes into fs via skypiax but when I generate dtmf tones on the
> phone they are not detected or decoded by fs.
>
> If I take the record_session file and spectrum analyze the recorded
> tones appear to be within spec.
>
>
> Can anybody suggest why this is not working for me?
>
>
> Is the correct sample rate being used in libteletone_detect.c?
> Does the Goertzel algorithm work for other sample rates other than
> 8000hz?
>
>
> I'm not sure why I can not get this to work?
>
>
>
> regards,
> Scott Torr
>
>
>
>
>
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-- 
Sincerely,

Giovanni Maruzzelli
Cell : +39-347-2665618