[Freeswitch-users] Inband DTMF Problem

Brian West brian at freeswitch.org
Wed Nov 5 12:35:16 PST 2008

Extract the RTP audio into wav/au files in wireshark and lets look at  


On Nov 5, 2008, at 2:30 PM, Klaus Teller wrote:

> Hi Anthony,
> Let me add some few facts.
> 1) I am sending DTMF using RFC2833 and the IVR is using Inband
> 2) The problem is not limited to when i send DTMF. It also happens  
> when i try to play a file.
> 3) The functions are from my java code. They send commands to  
> Freeswitch via socket interface.
> 4) The same functions are working perfectly when the remote IVR  
> sends DTMF via RFC2833.
> 5) I have a pause of 2000 ms after sending the DTMF.
> Let me reformulate my problem. I have a spurious dtmf-# being  
> detected by freeswitch where nothing was sent by the other party.
> The strange thing to me is that Wireschark (running on the same  
> machine as Freeswitch) detects the proper digit sequence.
> Klaus.

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