[Freeswitch-users] DTMF recognition flaky

Remko Kloosterman R.Kloosterman at mtel.nl
Thu May 7 00:04:49 PDT 2009

Hi Jay,


Did you make a wireshark trace yet? You should be able to find out
exactly what's going on there, which protocol is used, etc. We've had
our share of problems with DTMF over SIP trunks as well. Your problems
could also be related to timing issues introduced by multiple gateways.
Do you know some details on voicepulse's network? There's lots of
variations in implementation out there, unfortunately not always fully


Good luck,




Van: freeswitch-users-bounces at lists.freeswitch.org
[mailto:freeswitch-users-bounces at lists.freeswitch.org] Namens Jay Austad
Verzonden: woensdag 6 mei 2009 20:57
Aan: freeswitch-users at lists.freeswitch.org
Onderwerp: Re: [Freeswitch-users] DTMF recognition flaky


I'm running 1.0.4pre3.  Haven't gotten a chance to upgrade to pre7 yet.


2833 is the default right?  I haven't changed anything.  I'm using
voicepulse for my SIP trunks.  Is there an option I can add to that
definition to force RFC2833?



jay austad  |  612.423.1433  |  austad at signal15.com





On May 6, 2009, at 1:46 PM, Brian West wrote:

Well it depends.. first off are you doing inband dtmf or RFC2833?
Secondly what SVN rev are you running?




On May 6, 2009, at 1:44 PM, Jay Austad wrote:

Using the default installation, I've noticed that when I (or someone  
else) calls in on my SIP trunk and keys in an extension, not all of  
the numbers are recognized unless they hold the key down for at least  
1/2 second to a second.

Is there a way to improve DTMF recognition so people can just type in  
stuff without having to hold the keys down?


Brian West

brian at freeswitch.org


-- Meet us at ClueCon!  http://www.cluecon.com <http://www.cluecon.com/>





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