Freeswitch only sees the SIP side of the call according to your setup. So, make sure that your SIP provider is properly forwarding the DTMF in any one of the supported formats (inband, rfc2833, SIP INFO ). 



On Thu, Mar 1, 2012 at 7:31 AM, Erjian Li <eli@netspectrum.com> wrote:
Hi All,

I have a querstion about freeswitch conference caller controls. If anyone can give some hint/help, I'm very appreciated.



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Thanks & Regards,
Godson Gera
IVR India