A communication apparatus for communicating by radio with mobile stations located in a radio communication area of the communication apparatus and for connecting to a network of a communication carrier, the communication apparatus includes obtainment means for obtaining information on a selection equipment for selecting a control equipment on a basis of data stored in a detachable data storage device in case of the data storage device being connected to the communication apparatus, reception means for receiving information on the control equipment selected from a plurality of control equipments by the selection equipment accessed from the communication apparatus on a basis of the obtained information on the selection equipment, from the selection equipment, and connection means for performing communication by radio to the mobile station with the selected control equipment on a basis of the received information on the control equipment.