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H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
H04Q3/54—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker in which the logic circuitry controlling the exchange is centralised
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Computer Networks & Wireless Communication
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Devices For Supply Of Signal Current
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Communication Control
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Financial Or Insurance-Related Operations Such As Payment And Settlement
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