A system includes a recording server connected to a private branch exchange andor an interface device, where the connected PBX andor interface device are each connected to an electronic communication network. Desired voltage and power levels are supplied over local telephone lines by separating the DC power component from the central office or private branch exchange with a DC blocking filter while passing all AC telephony signals. The width of the first portion is wider than the width of the second portion. Selector circuitry selectively couples the AC and DC input circuitry to the pin driver first input. A pre-staging station supporting the transponder unit may further be utilized, the arm moving between the pre-staging station and the turntable and the gripping mechanism engaging the sensor housing at the pre-staging station to transport the transponder unit from the pre-staging station to the turntable.