Patent ID: 7558233

Claim:
A system for managing access from a plurality of communications networks to a mobile terminal connected to a mobile telecommunications network, the system comprising: an application server disposed within each of said plural communications networks; at least one domain server operatively coupled to said application server disposed in each of said plural communications networks, said at least one domain server receiving a first command message sent from the application server to request identification of said mobile terminal; at least one network address assignment server disposed in each of said plural communications networks; at least one incoming call request management interface operatively connected to said at least one network address assignment server, said at least one incoming call request management interface receiving a second command for assigning a network address with a user address of said mobile terminal; and at least one home location register located in said mobile telecommunications network; wherein said system is configured to set up at least one additional connection from at least one of said plural communications networks to said mobile terminal with an incoming call request, after said mobile terminal has sent the first command message to request said identification of said mobile terminal from the application server to said at least one domain name server disposed in a communications network, after said mobile terminal has been identified in said at least one address assignment server to which said communications network will establish said additional connection, after checking to determine whether the user address of said mobile terminal exists in said at least one incoming call request management interface connected to said at least one network address assignment server to prevent assignment of a second address corresponding to the same mobile terminal, after verifying accessibility to said mobile telecommunications network in said at least one home location register of said mobile terminal communications network, and after verifying authorization for receiving incoming calls provided by the user of said mobile terminal identified for accessing said communications network.