Patent ID: 7426265

Claim:
A call forwarding method for routing a call through a plurality of different networks, the method comprising: assigning a first call identifier for a call received in a subscriber's home network based on the subscriber's public address; determining a second network where a destination point for the call may be located; obtaining a second call identifier for said call from the second network, wherein the second call identifier is part of a first routing information; obtaining an identification of a first network interface through which said call may be routed, wherein the identification of the first network interface is part of the first routing information; sending the first routing information from an integrated management component to the subscriber's home network, wherein the subscriber's home network extends said call from the subscriber's home network through the first network interface into the second network using the first call identifier and the second call identifier; receiving a message in an integrated location management component that the call is to be forwarded to a third network; determining a second routing information to the third network, wherein the second routing information includes identification of a second network interface through which the call may be forwarded; and sending from the integrated location management component the second routine information to the subscriber's home network to indicate the call is to be forwarded to the third network, wherein the call to the second network is terminated by the subscriber's home network and the call is extended from the subscriber's home network through the second network interface to the third network.