An ECU determines whether or not there is an abnormality in a combination of shift signals provided from a shift position sensor. For this objective, a construction includes a holder substrate that individually receives plural conductive contacts, and a floating member attached to the holder substrate such that a distance from a surface of the holder substrate is varied within a predetermined range by an external force. Uplink and downlink timeslots are assigned to the WTRU for a handover cellsector. Also, a choice between a detachable frictional coupling and a fixed connection between the said parts is possible. In another aspect, the apparatus further comprises a electromechanical device adapted to selectively move the sleeve between the first position and the second position and further comprises a control line adapted to conduct an electrical current.