Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate
2007-01-09
2007-01-09
Vincent, David (Department: 2129)
Multiplex communications
Pathfinding or routing
Combined circuit switching and packet switching
C370S526000
Reexamination Certificate
active
09522184
ABSTRACT:
A signal processing system which discriminates between voice signals and data signals modulated by a voiceband carrier. The signal processing system includes a voice exchange, a data exchange and a call discriminator. The voice exchange is capable of exchanging voice signals between a switched circuit network and a packet based network. The signal processing system also includes a data exchange capable of exchanging data signals modulated by a voiceband carrier on the switched circuit network with unmodulated data signal packets on the packet based network. The data exchange is performed by demodulating data signals from the switched circuit network for transmission on the packet based network, and modulating data signal packets from the packet based network for transmission on the switched circuit network. The call discriminator is used to selectively enable the voice exchange and data exchange.
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Boora Bill
Enns David M.
Kwan Kenny C.
LeBlanc Wilf
Li Henry
Christie Parker & Hale LLP
Vincent David
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