[Freeswitch-users] DTMF: Mute sound for the other side?

hi, i am having a small problem with the dtmf-sounds... if i press a dtmf digit while i am bridged with another leg, the other side will hear the dtmf sound. this is very annoying and even worse in a conference, when multiple people can press dtmf digits (for (un-)muting themselves or using other functions). is there a way, to NOT let the other side hear the dtmf sound (but of course still make fs listening to it)? thanks for the help dennis