Advantages of a message by a server of a core network ip multimedia, and the server.

摘要

The present invention relates to a method of transmitting a message (m1), by a server (4) of a core network ip multimedia (cn) providing the establishment, during a recording of a terminal (2) from the core network, of a secure tunnel between the terminal and a connection (3) of the terminal to the core network, this transmission method comprising after the reception by the server of a registration request (reg2) of the terminal from the core network ip multimedia: - a step of identification of an access network (an) used by the terminal in order to log onto the core network ip multimedia; - a step of producing, as a function of the access network identified, a recommendation (reco) with respect to the setting up or not of the secure tunnel between the terminal and the connection; - a step of inserting this recommendation in the message sent by the server.