[Freeswitch-users] DTMF delay when using FreeSWITCH

Thu Sep 27 23:54:38 MSD 2012

Hey Ken,

I tried pass_rfc2833 with no noticeable change in the delay. It seemed to have made it less accurate though, especially in fast speed sequences.

Can I debug this further and how?

Thanks!
On Sep 27, 2012, at 3:00 PM, Ken Rice <krice at freeswitch.org> wrote:

> There can be a delay of DTMF in and DTMF out if you are sending long DTMFs
> using 2833, FreeSWITCH gets the entire DMTF and duration then regenerates
> it...
> 
> If you don't need to interpret the DTMF you can set a variable to make it
> just pass the DTMF through untouched... But this has its own set of caveats
> (ie: if whatever is sending you DTMF is broken it just pass broken 2833
> DTMF)
> 
> See http://wiki.freeswitch.org/wiki/Variable_pass_rfc2833
> 
> 
> 
> On 9/27/12 1:49 PM, "Emrah" <lists at kavun.ch> wrote:
> 
>> MC, the issue does not happen with inband DTMF and there is no delay!
>> 
>> Any idea on how to debug this further? I can't use inband continuously.
>> 
>> Thanks!
>> Emrah
>> 
>> On Sep 27, 2012, at 12:46 PM, Emrah <lists at kavun.ch> wrote:
>> 
>>> Never tried with inband DTMFs. Will check.
>>> 
>>> Thanks!
>>> On Sep 27, 2012, at 12:34 PM, Michael Collins <msc at freeswitch.org> wrote:
>>> 
>>>> Does it happen whether you use RFC2833 or inband DTMFs? Just curious.
>>>> -MC
>>>> 
>>>> On Wed, Sep 26, 2012 at 3:44 PM, Emrah <lists at kavun.ch> wrote:
>>>> Yes I did.
>>>> BTW, the example in the Wiki contradicts the inline documentation in
>>>> switch.xml.
>>>>   <!--
>>>>        The min-dtmf-duration specifies the minimum DTMF duration to use on
>>>>        outgoing events. Events shorter than this will be increased in
>>>> duration
>>>>        to match min_dtmf_duration. You cannot configure a dtmf duration on
>>>> a
>>>>        profile that is less than this setting. You may increase this value,
>>>>        but cannot set it lower than 400. This value cannot exceed
>>>>        max-dtmf-duration. -->
>>>> The Wiki shows an example with the value at 100.
>>>> 
>>>> I tried increasing and decreasing it to no avail, it does not seem to
>>>> interfere with anything I can measure with my ear. :P
>>>> On Sep 26, 2012, at 5:56 PM, Cesar Bermudez <cesar.bermudez at gmail.com>
>>>> wrote:
>>>> 
>>>>> You tried this:
>>>>> http://wiki.freeswitch.org/wiki/Sofia_Configuration_Files#DTMF
>>>>> 
>>>>> On Wed, Sep 26, 2012 at 3:19 PM, Emrah <lists at kavun.ch> wrote:
>>>>> Hi guys,
>>>>> 
>>>>> I am comparing this with an Asterisk and FreeSWITCH installation, using the
>>>>> same route, same codecs, same carrier, same phones and same serversŠ :P
>>>>> I experience a delay when pressing DTMFs on the line that uses FreeSWITCH.
>>>>> I am estimating the delay to be around 500 ms.
>>>>> 
>>>>> What are the settings I can fine tune to avoid this?
>>>>> 
>>>>> All the best,
>>>>> Emrah
>>>>> _________________________________________________________________________
>>>>> Professional FreeSWITCH Consulting Services:
>>>>> consulting at freeswitch.org
>>>>> http://www.freeswitchsolutions.com
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>> Official FreeSWITCH Sites
>>>>> http://www.freeswitch.org
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>>>>> http://www.cluecon.com
>>>>> 
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>>>>> 
>>>>> _________________________________________________________________________
>>>>> Professional FreeSWITCH Consulting Services:
>>>>> consulting at freeswitch.org
>>>>> http://www.freeswitchsolutions.com
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>> Official FreeSWITCH Sites
>>>>> http://www.freeswitch.org
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>>>>> http://www.cluecon.com
>>>>> 
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>>>> 
>>>> 
>>>> _________________________________________________________________________
>>>> Professional FreeSWITCH Consulting Services:
>>>> consulting at freeswitch.org
>>>> http://www.freeswitchsolutions.com
>>>> 
>>>> 
>>>> 
>>>> 
>>>> Official FreeSWITCH Sites
>>>> http://www.freeswitch.org
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>>>> http://www.cluecon.com
>>>> 
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>>>> 
>>>> 
>>>> 
>>>> -- 
>>>> Michael S Collins
>>>> Twitter: @mercutioviz
>>>> http://www.FreeSWITCH.org
>>>> http://www.ClueCon.com
>>>> http://www.OSTAG.org
>>>> 
>>>> 
>>>> _________________________________________________________________________
>>>> Professional FreeSWITCH Consulting Services:
>>>> consulting at freeswitch.org
>>>> http://www.freeswitchsolutions.com
>>>> 
>>>> 
>>>> 
>>>> 
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>>>> 
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>>> 
>> 
>> 
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>> 
>> 
>> 
>> 
>> Official FreeSWITCH Sites
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>> http://wiki.freeswitch.org
>> http://www.cluecon.com
>> 
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> 
> -- 
> Ken
> http://www.FreeSWITCH.org
> http://www.ClueCon.com
> http://www.OSTAG.org
> irc.freenode.net #freeswitch
> 
> 
> 
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
> 
> 
> 
> 
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://wiki.freeswitch.org
> http://www.cluecon.com
> 
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