Multiplex communications – Wide area network – Packet switching
Patent
1978-03-17
1980-05-06
Brown, Thomas W.
Multiplex communications
Wide area network
Packet switching
179 18EA, 370 91, H04Q 1104
Patent
active
042018919
ABSTRACT:
A distributed control digital switching network is configured as a group switch having a plurality of stages of multiport single sided switching elements for selectively interconnecting a plurality of input terminals via the transmission paths established through the network by path selection control signals which are multiplexed on common transmission links to and through the network together with digitally encoded data from the terminals on common transmission paths such that data is received phase asynchronously at each stage of the network and is either coupled to a higher order stage of the network or folded back through the network by reflection to interconnect terminals switched by the network. The single-sided switching elements are selectively operable as single-sided or multi-sided in accordance with their position in the network.
REFERENCES:
patent: 3749845 (1973-07-01), Fraser
patent: 3856993 (1974-12-01), Closs et al.
patent: 3912873 (1975-10-01), Skaperda
patent: 4025725 (1977-05-01), Euler
patent: 4045617 (1977-08-01), Schlichte
patent: 4064486 (1977-12-01), Faber
patent: 4074072 (1978-02-01), Christensen et al.
Cotton John M.
Denenberg Jeffrey N.
Lawrence Alan J.
Brown Thomas W.
International Telephone and Telegraph Corporation
Morris Jeffrey P.
O'Halloran John T.
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