The invention relates to the field of home networks, in particular to the connection of two home networks of different types via a gateway. The network appliances in the network of the first type are also intended to be able to control the network appliances in the network of the second type, and vice versa. One problem that occurs when carrying out conversion processes on control messages is that an input parameter which is known in the network of the first type can be changed as required and can also be signaled further within this network, but the associated correspondence in the network of the second type is permanently set, and accordingly cannot be changed. The invention provides a way in which an input parameter such as this can nevertheless be likewise updated in the network of the second type.