Abstract: A method of initializing a link between a mobile terminal of a public mobile network and a domestic base station, for example a public switched network base station, comprises authentication of the mobile terminal by the public mobile network, transmission of data for initializing the link with the domestic base station to the terminal from the public mobile network and transmission of the data from the mobile terminal to the domestic base station. The public mobile network operator can therefore manage the channels used by the mobile terminal for the link with the domestic base station. The method further assures authentication that is as secure as that of the public mobile network.

Abstract: A method of initializing a link between a mobile terminal of a public mobile network and a domestic base station, for example a public switched network base station, comprises authentication of the mobile terminal by the public mobile network, transmission of data for initializing the link with the domestic base station to the terminal from the public mobile network and transmission of the data from the mobile terminal to the domestic base station. The public mobile network operator can therefore manage the channels used by the mobile terminal for the link with the domestic base station. The method further assures authentication that is as secure as that of the public mobile network.

Abstract: A digital radiotelephone installation with mobile terminals includes a fixed base transceiver station, which is an element of the network, and mobile telephone terminals at least some of which are designed to be unable to access the network until a user has inserted therein an extractable personalized smart card ("SIM card"). Each mobile terminal is designed to receive, in addition to the extractable "conventional" SIM card, another, auxiliary SIM smart card which remains in the mobile terminal at all times. The auxiliary SIM card corresponds to the same personalized subscription as the conventional SIM card. The extractable conventional SIM card takes precedence over the auxiliary SIM card when it is inserted into said mobile terminal, however, and has the same functionality as the latter.