We have a client who has a Soundstation 6000. They have been using the table mics for some time. however they would rather use an high quality Shure microphone. Two questions, 1) what is the pinout in the rj11 jack for the mic, 2) has anyone done something like that before where you make a custom cable for this phone system. We have done this for cisco products but not the polycom. Our plan would be to come out of the RJ11 and into an mini preamp and then to the Shure mics.