Commo connections from the radio to the box are by using 1 RJ45 breakout board and a single RJ12 connector, the two mounted with the rear on the box. Commo through the box towards the microphone is by way of a person RJ12 connector, which happens to be employing only 3 of your 6 wires: mic ground, warm, and 5v.The U8G is really an upgraded Variatio