A system comprises a basic-input-output-system, a disk drive, and a security system configured to prevent unauthenticated access to the disk drive. The delivery system has a retaining vessel with retained fluid, in the vessel, and a reference probe to signal a level probe when fluid reaches a predetermined level on receipt of a replenish signal from the controller for the printing device. A device for simplifying handover back determines that the restricted local access point is a candidate for further handover based on this data and informs the mobile station about the restricted local access point via the unrestricted glob access point.