A system and method for securely exchanging sensitive information with an implantable medical device is presented. The cylinder body of the holding cylinder is provided with a plurality of lengthwise blocking ribs and lateral one-way blocks spaced apart on an outer surface, and an annular fitting aperture is formed on the outer surface between the open ends of the blocking ribs and the one-way bocks for the rotatable ring to fit around the annular fitting aperture. The second differential pair has first and second inputs of an input pair connected to the second input terminal the output terminal, respectively. The repeat-paging directive directs the second base station to begin broadcasting a second series of page messages destined to the mobile station. An electrical socket is provided in the compressor. The lead is the external connection terminal of the semiconductor device.