Multiplex communications – Wide area network – Packet switching
Patent
1978-11-07
1981-12-15
Stewart, David L.
Multiplex communications
Wide area network
Packet switching
370 66, H04Q 1104
Patent
active
043063039
ABSTRACT:
A digital switching device of the stored program type operating under the control of a central control unit has a multiplexing stage for multiplexing signals from a plurality of ports, an input time switching stage which receives multiplexed signals from the multiplexing stage and outputs them in appropriate time slots, an interface unit connecting the input time switching stage to an output time switching stage and a demultiplexing stage which demultiplexes signals from the output time switching stage for transmission to said ports. The interface unit is an interchangeable unit which either provides a direct connection between the input and output time switching stages or comprises a space switching stage.
REFERENCES:
patent: 3596246 (1971-07-01), Nakagome
patent: 3956593 (1976-05-01), Collins
Nixon Larry S.
Stewart David L.
The Post Office
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