A system and method of providing, to a client, access to multiple packet data networks, each PDN providing a dedicated PDN connection is disclosed. Zone and polygon menus can be provided wherein the breadth can be increased by a factor of about two or more while providing quick selection and maintaining selection accuracy. The first refiner element andor the second refiner element are arranged to rotate around the middle axis and the refiner elements have refining surfaces, through which the fibrous material is fed into or exits the refining space.