[Freeswitch-users] DTMF delay when using FreeSWITCH

Anthony Minessale anthony.minessale at gmail.com
Thu Oct 4 01:44:12 MSD 2012 

Set the following variable either per leg in dialplan or globally in
vars.xml

rtp_manual_rtp_bugs=IGNORE_DTMF_DURATION

This will pass the dtmf in 2833 on receipt of the first packet.

If that doesn't work, don't bother going further because we do not put
emphasis on realtime dtmf.  Asterisk can focus on that and we'll focus on
scalability.  The suggestions you have seen pretty much cover your options.





On Wed, Oct 3, 2012 at 2:39 PM, Emrah <lists at kavun.ch> wrote:

> I am running out of ideas and would really appreciate some input on this.
>
> Can I optimize this in any way?
>
> Best,
> Emrah
>
> On Sep 30, 2012, at 12:05 AM, Emrah <lists at kavun.ch> wrote:
>
> > When I try this, the delay disappears but FS detects multiple DTMFs
> where I only send one…
> > <action application="export" data="dtmf_type=none" inline="true"/>
> > <action application="start_dtmf" />
> >
> > start_dtmf_generate adds the delay and so I'm stuck…
> >
> > Any suggestion?
> > On Sep 29, 2012, at 2:29 PM, Emrah <lists at kavun.ch> wrote:
> >
> >> 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://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://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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> >>>>>>> UNSUBSCRIBE:
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> >>>>>>> http://www.freeswitch.org
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>> --
> >>>>>>> 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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> >>>>>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> >>>>>>> UNSUBSCRIBE:
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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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> >>>>
> >>>> --
> >>>> 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
> >>>>
> >>>> FreeSWITCH-users mailing list
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> >>>
> >>
> >
>
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> 
> 
>
> Official FreeSWITCH Sites
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>
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>



-- 
Anthony Minessale II

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