Motorola Tech Help on PM400

[asweezy]

Hello all I am installing a PM400 and need to use a rear DTMF mic along with speaker. The general speaker and microphone portion of the situation are not a big issue through the 16 pin connector but how do I go about using the DTMF mic and is functions through it? I know it can be done because I have seen it done in other vehicles with same radio.

 

[Uman18]

I never delt with DTMF but you might have to activate the DTMF via the CPS settings and "tell" the radio you are using the DTMF mic.