| 摘要 |
A method and a system for conducting a call between a mobile station and a callee over a first wireless network and a second wireless network are provided. A call is initiated through an anchor call server when a first wireless network services the mobile station. The call comprises a first call leg between the anchor call server and the mobile station through the first wireless network, and a second call leg between the anchor call server and the callee. The mobile station detects the presence of a second wireless network when it moves into a service area of the second wireless network. A third call leg is now established between the anchor call server and the mobile station through the second wireless network. Once the third call leg is established, the first call leg is disconnected.
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