User Friendly PC SERIES Semiconductor is manufactured both as single discrete devices and as integrated circuits, which consist of a number from a few to billions of devices manufactured and interconnected on a single semiconductor substrate, or wafer. The Semiconductor has an electrical conductivity value falling between that of a conductor, such as copper, and an insulator, such as glass. The User Friendly PC SERIES Semiconductor can be used as a component basis for fabrication of telephone sets, automatic telephone station, systems of cashless settlements for telephone conversations.