Apparatus for automatically distributing communications between users and a fleet of mobile stations through a central station including a telephone exchange (1), a plurality of telephone answering modules (3) provided with a phone numbers data-bank and connected between said exchange (1) and a LAN net (4), and a pair of central processing modules (5, 5') connected to said LAN net (4) and to a plurality of radio transmission interface modules (6), each of these controlling a receiving radio (7) and a transmitting radio (8). Each mobile station includes a radio transceiver provided with a keyboard and a display, a localizing device, and a local processing module controlling the operation of the mobile station and containing a clock provided with a clock time controller.