Embodiments of the present invention relate to a router able to cooperate with a mobile host of a home network for initializing a communication between said mobile host and a correspondent node over at least a first and a second networks, said mobile host comprising at least a first and a second network interfaces able to connect respectively to said first and second networks, said router being further able to: attach the mobile host to said second network; receive a request for a communication address; transmit a communication address to said mobile host; and configure said mobile host with a predefined model indicator for enabling said mobile host to receive through its second network interface some data sent by the correspondent node towards the first network interface. Embodiments of the invention also relate to a mobile host with which the router cooperates.