I've tried google and yahoo but can't seem to find the pinout.

It's a desk mic with a long gooseneck and two buttons (PTT & Mon)
There's no cord, and I've got it pulled apart on the bench here and have
figured out most of the RJ-45 connector on the back. The two right and
leftmost pins (1&2, 7&8) are for the PTT and Mon respectively, and it
appears 4&5 are NC. The mic audio appears to be on 3&6, but I can't
quite decipher the polarity as there's a bit of a preamp circuit on the
board. The other puzzling thing is the fact that the ground of the PCB
(which is also common to one side of the mic element) does not come out
to the RJ-45 connector.

Anyone here have Motorola experience that can share the pinout with me?
The circuit board itself is labelled "BLN7150A C2546585"


reply here or email

Thanks!
Pat, VE3PMK