Looking for dtmf mic


Hello all,
I have a D700 and looking for a compatible dtmf mic. I also have a V71 (with 2 dtmf mics) and tried one of them to the D700 but it can't send tones, however mic audio and ptt works fine.

Any ideas how to modify the V71 mic to work with D700 (send dtmf tones) or a place to buy a compatible D700 dtmf mic ?


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