Abstract: At least one user is given access to a respective home operator over a communication network such as an IP network, via an access network and through any of a plurality of supported visited networks. The user is communicated a list of the supported visited networks and is thus given the possibility of selecting one of the supported visited networks as the path for reaching the respective home operator.

Abstract: A method for identification and registration of a moving object, entering a pre-determined area to be monitored. The identification operation has interaction between the moving object and an area access system associated with the predetermined area and including supplying identification information, while the registration operation is carried out over a wireless communication link to a control center. The method further includes identifying the moving object through a mutual interaction between the moving object and the area access system, the mutual interaction being performed over a wireless short range communication link, preferably a Bluetooth wireless link; and performing the registration operation by establishing a wireless communication link of the long-range type between the moving object and the control center upon activation of the mutual interaction on the wireless short range communication link. Preferred application is safety monitoring of tunnels.

Abstract: A method for identification and registration of a moving object, entering a pre-determined area to be monitored. The identification operation has interaction between the moving object and an area access system associated with the predetermined area and including supplying identification information, while the registration operation is carried out over a wireless communication link to a control center. The method further includes identifying the moving object through a mutual interaction between the moving object and the area access system, the mutual interaction being performed over a wireless short range communication link, preferably a Bluetooth wireless link; and performing the registration operation by establishing a wireless communication link of the long-range type between the moving object and the control center upon activation of the mutual interaction on the wireless short range communication link. Preferred application is safety monitoring of tunnels.

Abstract: At least one user is given access to a respective home operator over a communication network such as an IP network, via an access network and through any of a plurality of supported visited networks. The user is communicated a list of the supported visited networks and is thus given the possibility of selecting one of the supported visited networks as the path for reaching the respective home operator.