Hello,
In my new project I need to design a peripheral that contains a microphone and speaker (something like a handsfree device). I'm going to interface it with the main board with stantard UTP cable (network twisted pair 100ohm).
One pair for VCC and GND, one to balanced MIC signal, one to speaker signal and the last to a couple control lines.
My question is, could the two audio signals interfere with each other? Both the mic and the speaker signal are amplified inside the peripheral (the speaker signal is sent from the main board in line level).
Thanks in advance.