FIELD: radio communication. SUBSTANCE: in accordance with invention bidirectional radio pager automatically identifies and transmits message on change of servicing zone in which it is positioned to central control station which is technical result of invention. Central control station in its turn determines present position of radio pager and registers change of servicing zone in which radio pager is. EFFECT: automatic identification and registration of servicing zone of radio pager. 1 cl, 8 dwg, 2 tbl
