Patent ID: 7844270

Claim:
A system comprising: a) a wireline network interface; b) a local wireless interface providing a communication zone in which communications with a mobile terminal are possible, the mobile terminal associated with a primary directory number associated with a wireline network and adapted to communicate with the local wireless interface to facilitate a call through the wireline network and communicate with a cellular wireless network to facilitate a call through the cellular wireless network; and c) a control system cooperating with the wireline network interface and the local wireless interface and adapted to: i) use the primary directory number associated with the wireline network to establish through the wireline network a first call involving the mobile terminal by communicating with the wireline network via the wireline network interface and communicating with the mobile terminal via the local wireless interface; ii) during the first call, detect the mobile terminal moving out of the local wireless communication zone; and iii) initiate a transition of the first call being connected to the mobile terminal through the wireline network via the local wireless interface to the first call being connected to the mobile terminal through the cellular wireless network using a temporary directory number provided by a visited wireless switch currently providing cellular wireless access for the mobile terminal.