FIELD: communications engineering. SUBSTANCE: network is provided with first counter of first value, and second counter is provided in network infrastructure, value calculated by this counter being stored separately as second value for each subscriber station in register; request for establishing call incorporating first value is sent from mentioned subscriber station to network infrastructure through calling channel, second value is retrieved from register for mentioned subscriber station, first value is compared with second one, and if first and second values are identical, mentioned request for call is received, random number is conveyed to subscriber station over load channel, first and second values are corrected with aid of this number. EFFECT: provision for detecting subscriber station duplicate. 15 cl, 5 dwg
