Hi, I have an freeswitch system running which accepts incoming calls and requests a pincode for people to identify themselves to the system. I am getting an increasing number of issues where the dtmf tones being received appear to get doubled up. So I enter 1234 on my telephone keypad and 11223344 appears to be received in the buffer when calling getDigits. This doesn't happen all the time but often enough to be a problem. All the calls in to my system are forwarded on to me directly via SIP from a major UK telecoms provider that terminates numbers for us. Can anyone suggest what dtmf settings I may have got wrong that would cause this phenomenon or any suggestions how I can go about fixing it? I'm using . <action application="start_dtmf" /> In my dialplan. And these settings in my SIP profile: <param name="dtmf-duration" value="100"/> <param name="dtmf-type" value="rfc2833"/> Any help much appreciated. Many thanks Andy
If you are using RFC-2833, you do not need to "start_dtmf". I believe that is only used when you are receiving DTMF inband. If your provider sends RFC-2833, just disable inband DTMF. Guillermo On Thu, Mar 6, 2014 at 9:06 AM, Andy Ayers <andy@fabulous4.co.uk> wrote:
Hi,
I have an freeswitch system running which accepts incoming calls and requests a pincode for people to identify themselves to the system. I am getting an increasing number of issues where the dtmf tones being received appear to get doubled up. So I enter 1234 on my telephone keypad and 11223344 appears to be received in the buffer when calling getDigits. This doesn't happen all the time but often enough to be a problem. All the calls in to my system are forwarded on to me directly via SIP from a major UK telecoms provider that terminates numbers for us.
Can anyone suggest what dtmf settings I may have got wrong that would cause this phenomenon or any suggestions how I can go about fixing it?
I'm using ...
<action application="start_dtmf" />
In my dialplan. And these settings in my SIP profile:
<param name="dtmf-duration" value="100"/>
<param name="dtmf-type" value="rfc2833"/>
Any help much appreciated.
Many thanks
Andy
_________________________________________________________________________ Professional FreeSWITCH Consulting Services: consulting@freeswitch.org http://www.freeswitchsolutions.com
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-- Guillermo Ruiz Camauer
Exactly, because the detector can get false positives too. Upstream sometimes will not squelch the entire DTMF out and some may slip thru and still get picked up by the inband detector. -- Brian West brian@freeswitch.org FreeSWITCH Solutions, LLC PO BOX 2531 Brookfield, WI 53008-2531 Twitter: @FreeSWITCH , @briankwest http://www.freeswitchbook.com http://www.freeswitchcookbook.com T: +1.918.420.9001 | F: +1.918.420.9002 | M: +1.918.424.WEST iNUM: +883 5100 1420 9001 ISN: 410*543 Skype:briankwest PGP Key: http://www.bkw.org/key.txt (AB93356707C76CED) On Mar 6, 2014, at 7:00 AM, Guillermo Ruiz Camauer <grcamauer@gmail.com> wrote:
If you are using RFC-2833, you do not need to "start_dtmf". I believe that is only used when you are receiving DTMF inband. If your provider sends RFC-2833, just disable inband DTMF.
Guillermo
Many thanks guys, Great as ever. I'll give that a go. Do I need to do anything else to disable inband dtmf apart from removing dtmf_start? On 6 March 2014 14:58, Brian West <brian@freeswitch.org> wrote:
Exactly, because the detector can get false positives too. Upstream sometimes will not squelch the entire DTMF out and some may slip thru and still get picked up by the inband detector. -- Brian West brian@freeswitch.org FreeSWITCH Solutions, LLC PO BOX 2531 Brookfield, WI 53008-2531 Twitter: @FreeSWITCH , @briankwest http://www.freeswitchbook.com http://www.freeswitchcookbook.com
T: +1.918.420.9001 | F: +1.918.420.9002 | M: +1.918.424.WEST iNUM: +883 5100 1420 9001 ISN: 410*543 Skype:briankwest PGP Key: http://www.bkw.org/key.txt (AB93356707C76CED)
On Mar 6, 2014, at 7:00 AM, Guillermo Ruiz Camauer <grcamauer@gmail.com> wrote:
If you are using RFC-2833, you do not need to "start_dtmf". I believe that is only used when you are receiving DTMF inband. If your provider sends RFC-2833, just disable inband DTMF.
Guillermo
_________________________________________________________________________ Professional FreeSWITCH Consulting Services: consulting@freeswitch.org http://www.freeswitchsolutions.com
FreeSWITCH-powered IP PBX: The CudaTel Communication Server http://www.cudatel.com
Official FreeSWITCH Sites http://www.freeswitch.org http://wiki.freeswitch.org http://www.cluecon.com
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
Nope. -- Brian West brian@freeswitch.org FreeSWITCH Solutions, LLC PO BOX 2531 Brookfield, WI 53008-2531 Twitter: @FreeSWITCH , @briankwest http://www.freeswitchbook.com http://www.freeswitchcookbook.com T: +1.918.420.9001 | F: +1.918.420.9002 | M: +1.918.424.WEST iNUM: +883 5100 1420 9001 ISN: 410*543 Skype:briankwest PGP Key: http://www.bkw.org/key.txt (AB93356707C76CED) On Mar 6, 2014, at 11:41 AM, Andy Ayers <andy@fabulous4.co.uk> wrote:
Many thanks guys, Great as ever. I'll give that a go. Do I need to do anything else to disable inband dtmf apart from removing dtmf_start?
On 6 March 2014 14:58, Brian West <brian@freeswitch.org> wrote: Exactly, because the detector can get false positives too. Upstream sometimes will not squelch the entire DTMF out and some may slip thru and still get picked up by the inband detector. -- Brian West brian@freeswitch.org FreeSWITCH Solutions, LLC PO BOX 2531 Brookfield, WI 53008-2531 Twitter: @FreeSWITCH , @briankwest http://www.freeswitchbook.com http://www.freeswitchcookbook.com
T: +1.918.420.9001 | F: +1.918.420.9002 | M: +1.918.424.WEST iNUM: +883 5100 1420 9001 ISN: 410*543 Skype:briankwest PGP Key: http://www.bkw.org/key.txt (AB93356707C76CED)
participants (3)
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Andy Ayers
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Brian West
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Guillermo Ruiz Camauer