Multiplex communications – Wide area network – Packet switching
Patent
1986-09-17
1990-06-19
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
350 9614, 455611, 455612, H04B 900
Patent
active
049359185
ABSTRACT:
An optical communications systems, e.g. a telephone system, comprising means to accept even electrical communication signals from transmitting stations, modulate an optical signal with said signal from the transmitting station and, using time-division-multiplexing (TDM), provide a resultant optical communication signal to a central station which utilizes a frequency-division-multiplexing (FDM) system for handling incoming optical signals before passing the optical communication signals on to a receiving station which utilizes time-division-demultiplexing means and, where necessary, reconverts the optical signal to an electrical communication signal. Particular advantages of the system are that it can handle and switch a very large number of signals and that it can be utilized in a hybrid communications system wherein, for example, users of the system can maintain conventional electrical entrance wiring connections and conventional non-optical telephones and yet interface readily with optical street lines of the system. Particular aspects of the invention are novel modulating and signal-selection devices.
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Beek L. Van
Olms Douglas W.
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