Abstract: An object of the invention is to provide services available on a private network (14) to a user of a mobile terminal (12) connected to a public or private mobile network (10). To this end, the invention provides a telecommunications gateway (22) which is connected between the exchange of the private network (14) and the mobile network. The gateway converts signaling data from the exchange (16) of the private network (14) to a format compatible with a protocol enabling transmission of information and services to and from a mobile terminal, for example the wireless application protocol. It then sends the converted signaling data to the mobile terminal (12) via the mobile network. In the reverse direction, the gateway converts signaling data from the mobile terminal to a format compatible with the exchange and transmits the converted signaling data to the exchange. The invention enables use of services of the private network—call forwarding management, calling by name, etc.—from a mobile terminal.