Abstract: An unlicensed-radio access network includes an access controller (303) adapted to communicate with the core network portion of a public mobile communication network (20) and connected to a broadband packet-switched network (302). The access controller receives messages from mobile stations via the broadband packet-switched network. The access controller comprises a screening module (3031-3034) for monitoring information received from a mobile station and a connection controller (3035) coupled to the screening module for controlling the connection between the mobile station and the access controller. The screening module is adapted to determine whether a mobile station is permitted to connect to the access controller, and the connection controller is adapted to terminate a connection with the mobile station if the screening module determines that the mobile station is not permitted to connect to the access controller.