Multiplex communications – Duplex – Communication over free space
Reexamination Certificate
2000-03-09
2008-09-09
Moore, Ian N (Department: 2616)
Multiplex communications
Duplex
Communication over free space
C370S252000, C370S400000
Reexamination Certificate
active
07423983
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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International Telecommunication Union, ITU-T Telecommunication Stan
Boora Bill
Enns David M.
Kwan Kenny C.
LeBlanc Wilf
Li Henry
Broadcom Corporation
Moore Ian N
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