Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate
2007-12-04
2007-12-04
Harper, Kevin C. (Department: 2616)
Multiplex communications
Pathfinding or routing
Combined circuit switching and packet switching
C370S401000, C370S522000
Reexamination Certificate
active
11481801
ABSTRACT:
A distributed network switching system includes a data network. The system also includes multiple access interworking function (A-IWF) devices each operating as a gateway that enables customer premises devices to directly interface into the data network. The system further includes a centralized control and signaling interworking function (CS-IWF) device that performs call control functions and administrative functions and is adapted to interface narrowband and broadband signaling for call processing and control within the data network.
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Allen, Jr. George Coleman
Bi Haifeng
Partridge Steven R.
Sigarto Samuel
Sigarto Tina
AT&T Labs, Inc.
Greenblum & Bernstein P.L.C.
Harper Kevin C.
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