The Payphone Dial Tone Service System receives control and communication data via a VoIP communication connection that originates at an Analog Terminal Adapter and modem connected to the smart payphone. The piezoelectric element is provided to the sheet in such a manner that the upper surface of the plate-like piezoelectric element is parallel to the upper surface of the sheet. The image sensing integrated circuit chip has a light sensing area on the light receiving side. It is believed that this combination binds to the available urushiol receptors rendering it inactive. The test data for the subset of integrated circuits is analyzed to determine a defect parameter for the subset of integrated circuits.