System, device, and method for providing call forwarding in dual subscription mode
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United States of America Patent
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Sep 21, 2010
Issued Date -
N/A
app pub date -
Jun 17, 2008
filing date -
Jun 20, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
A method and system for providing interworking between a first and a second network of different types, preferably an IMS and a CS (Circuit-Switched) network. A call received by the first network and directed to a terminal unregistered from the first network, is forwarded to the second network, whereas when the call is received by the second network and is directed to a terminal unregistered from the second network, the call is not forwarded to the first network. The same identifier, preferably the same E.164 number, is used in both networks for identifying the called terminal. Preferably, the first network is informed on the registration of the terminal to the second network, the first network using this information as basis for the decision whether or not to route a call to the second network.
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