Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate
2005-06-14
2005-06-14
Phan, Man U. (Department: 2665)
Multiplex communications
Pathfinding or routing
Combined circuit switching and packet switching
C370S401000, C370S254000
Reexamination Certificate
active
06907031
ABSTRACT:
A call from a calling party (12) is routed to at least one called party (14, 16, and18) in accordance with the network preference of the calling party while taking into account the network capability of the called party. The calling party initiates an attempt to the called party over a preferred network (32) by first querying a database (40) containing records, each indicating the network capability of a corresponding called party. If the called party has the capability of receiving a call on the preferred network, the call is routed over that network. Otherwise, the call is routed over an alternate network (30) on which the called party has the capability of receiving a call.
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Ehlinger James
Fellingham Paul J.
Gilboy Christopher P
AT&T Corp.
Nguyen Toan
Phan Man U.
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