A method for access control in a wireless network having a base station and a plurality of remote hosts includes the optional abilities of making dynamic adjustments of the uplinkdownlink transmission ratio, making dynamic adjustments of the total number of reservation minislots, and assigning access priorities by message content type within a single user message stream. The GUI provides the user with intuitive programming access to the controller. The filtering circuit filters external andor internal interference that may affect the sensing of a capacitance change andor the sound quality of an audio device. The first linkage element is switched from its first state to its second state by a locking signal.