[Freeswitch-users] double dtmf

Yuriy Nasida nasida at live.ru
Wed Nov 2 22:18:53 MSK 2011


Hello again,
So I have made and analyse the two *.cap files. the first  file contains call from pstn with dtmf issue. the second file contain call from sip softphone without dtmf issue.
As far as I see when I call from softphone and send dtmf, in this moment the media stream is empty (because softphone cut dtmf from media in accordance with rfc2833).
But when I call from pstn (from cell phone for example) and send dtmf, in this moment the media stream is not empty. I see the hits which 	correspond the sending of dtmf. I think that therefore I receive double dtmf on endpoint. 
How I can to suppress dtmf in inband ?
"Please let me know if you have addressed this issue."Sure.
Thanks.
Date: Wed, 2 Nov 2011 10:44:08 +0530
From: vellayappan.n at mobax.com
To: freeswitch-users at lists.freeswitch.org
Subject: Re: [Freeswitch-users] double dtmf

Hi,

I too have the same issue.  When calling from  PSTN number,  the freeswitch says  Incoming call  from "0000000000"  instead of the actual number.  Moreover it detects only few digits (say 2 or 3)  not all the dtmf numbers.  


Please let me know if you have addressed this issue.

 

2011/11/2 Yuriy Nasida <nasida at live.ru>






Thank you for your answer.
"are you doing something explicitly to send the DTMF"
No. I just press buttons in my cell phone (I mean startpoint). 
In my opinion it is strange. I make answer() in lua script and use session:getDigits(). All works fine.
In the end of script I use execute_extension which implements bridge.session:execute("execute_extension", "".. recieved_digit .." XML ".. user_context .."")

Thus the call was answered in lua script. Next the call go to endpoint. How dtmf must be transmitted in this case ?

Why I have not issues when I call from sip devices?
Any help are welcomed.

Thanks.
From: avi at avimarcus.net

Date: Tue, 1 Nov 2011 21:22:11 +0200
To: freeswitch-users at lists.freeswitch.org
Subject: Re: [Freeswitch-users] double dtmf


"when I try to send dtmf second time for endpoint " - are you doing something explicitly to send the DTMF?


I just ignore the dtmf, and when FS bridges it sends the call on properly. 

-Avi


2011/11/1 Yuriy Nasida <nasida at live.ru>







Hello community,
I have some issue with delivery of dtmf.The call flow is:


one sip provider - FS -  second sip provider - endpoint which expects correct dtmf
On FS I have simple custom lua application which implement logic of calling cards system.



I have not issues when I call to lua application. I can enter destination number (by using dtmf apparently) and all works fine. But when I try to send dtmf second time for endpoint which expects correct dtmf I have issue with double dtmf. 



It is noted that when I call from sip device I have not ANY issues. But I have issue when I call from any cell phone or landline phone.



Any ideas are welcomed.
Thanks.


 		 	   		  



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Regards
Vellayappan



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