To activate an interactive multimedia station (BN) providing facilities of a mobile office to a user of a mobile radio terminal (TM), the mobile terminal (TM) signals its presence in the vicinity of the station (BN), either by local radio link to the station itself, or by short messages to a management server (SB) when the terminal is a radiotelephone. An identifier of the terminal is transmitted from the station (BN) to the management server, or to a location recorder of the radiotelephony network (RR) to activate the station after validating the identifier.