[Freeswitch-users] Controlling tones for RFC2833 DTMFs

Hi, If Freeswitch receives rfc2833 DTMFs, given that these DTMFs are out-of-band, does Freeswitch generate a tone to indicate to the user that a key has been pressed? Assuming it does, is there a way to prevent the tone from being generated, i.e. so the user doesn't hear anything when a key is pressed? Thanks Mark