[Freeswitch-users] DTMF delay when using FreeSWITCH

Sat Sep 29 22:29:26 MSD 2012

Hi all,

I am now trying to force inband DTMF on my PSTN peers alone. I tried the following with no luck:
<action application="start_dtmf" />
<action application="export" data="dtmf_type=inband" />

The delay is still there and I get the following output in my console for a single DTMF:

2012-09-29 19:22:57.357913 [DEBUG] switch_rtp.c:3797 RTP RECV DTMF 2:1040
2012-09-29 19:22:57.357913 [DEBUG] switch_ivr_bridge.c:393 Send signal sofia/external/1234567890 [BREAK]
2012-09-29 19:22:57.377912 [DEBUG] switch_rtp.c:2736 Send start packet for [2] ts=748000 dur=160/160/1040 seq=27258 lw=748000
2012-09-29 19:22:57.397908 [DEBUG] switch_rtp.c:2636 Send middle packet for [2] ts=748000 dur=320/320/1040 seq=27259 lw=748160
2012-09-29 19:22:57.417913 [DEBUG] switch_rtp.c:2636 Send middle packet for [2] ts=748000 dur=480/480/1040 seq=27260 lw=748320
2012-09-29 19:22:57.437960 [DEBUG] switch_rtp.c:2636 Send middle packet for [2] ts=748000 dur=640/640/1040 seq=27261 lw=748480
2012-09-29 19:22:57.457912 [DEBUG] switch_rtp.c:2636 Send middle packet for [2] ts=748000 dur=800/800/1040 seq=27262 lw=748640
2012-09-29 19:22:57.477904 [DEBUG] switch_rtp.c:2636 Send middle packet for [2] ts=748000 dur=960/960/1040 seq=27263 lw=748800
2012-09-29 19:22:57.497915 [DEBUG] switch_rtp.c:2636 Send end packet for [2] ts=748000 dur=1120/1120/1040 seq=27264 lw=748800
2012-09-29 19:22:57.497915 [DEBUG] switch_rtp.c:2636 Send end packet for [2] ts=748000 dur=1120/1120/1040 seq=27265 lw=748800
2012-09-29 19:22:57.497915 [DEBUG] switch_rtp.c:2636 Send end packet for [2] ts=748000 dur=1120/1120/1040 seq=27266 lw=748800
2012-09-29 19:22:57.497915 [DEBUG] switch_rtp.c:2589 Queue digit delay of 40ms

Any idea would be greatly appreciated.

All the best,
Emrah
On Sep 27, 2012, at 3:54 PM, Emrah <lists at kavun.ch> wrote:

> 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
>>>>>> http://wiki.freeswitch.org
>>>>>> http://www.cluecon.com
>>>>>> 
>>>>>> FreeSWITCH-users mailing list
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>>>>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
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>>>>>> http://www.freeswitch.org
>>>>>> 
>>>>>> _________________________________________________________________________
>>>>>> 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
>>>>>> 
>>>>>> FreeSWITCH-users mailing list
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>>>>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
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>>>>> 
>>>>> 
>>>>> _________________________________________________________________________
>>>>> 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
>>>>> 
>>>>> FreeSWITCH-users mailing list
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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
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>> Official FreeSWITCH Sites
>>>>> http://www.freeswitch.org
>>>>> http://wiki.freeswitch.org
>>>>> http://www.cluecon.com
>>>>> 
>>>>> FreeSWITCH-users mailing list
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>>>>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>>>>> http://www.freeswitch.org
>>>> 
>>> 
>>> 
>>> _________________________________________________________________________
>>> 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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>> 
>> -- 
>> 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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> 