A network for transporting power and multiplexed data and digital telephone signals. The server performs the core components and collects relevant context data. A chucking detect circuit receives the signal from the amplifying circuit and is configured to produce a first signal indicative of a substrate on the electrostatic chuck and a second signal indicative of an electrostatic chuck without a substrate. If so, a point count can be changed responsive to a further determination that the outcome from the course of action comports with the predicted outcome. The stem 130 includes an enlarged shoulder 152 which engages a contiguous single piece shear bushing 148 having a diameter greater than the diameter of the stem bore 130, thereby preventing removal andor blowout of the stem 130 without prior removal of the shear bushing 148.