Commo connections within the radio to the box are via 1 RJ45 breakout board and 1 RJ12 connector, each mounted with the rear on the box. Commo through the box on the microphone is by means of one particular RJ12 connector, which happens to be applying only three of your 6 wires: mic floor, sizzling, and 5v.The U8G is an upgraded Variation of last y