Im not a 100% certain, but isn't the mic in/out for when you have a voice controlled RNS-E, using the same mic for phone and RNS by daisy chaining.
I'm looking into the wiring for the phone/RNS-E setups now, everyone I have done connected directly to the module and not the RNS-E
Craig
I'm looking into the wiring for the phone/RNS-E setups now, everyone I have done connected directly to the module and not the RNS-E
Craig