A server of a telecommunications systems including first mechanisms for connecting to a mobile communications system which in turn connects to terminals on a radio connection, and second mechanisms for connecting to another telecommunications systems of the Internet type. According to the invention, the server is thus arranged to receive commands from the terminals and convert them into a format compatible with at least one of the protocols of the other telecommunications system; and to receive information from the direction of the other telecommunications system and to convert it into a format compatible with at least one protocol of the mobile communications system.