Back to results
US 4,360,911 AGranted
Digital signal switch system having space switch located between time switches
AssigneeThe Post Office
InventorJohn H. M. Hardy
Life of this patent
Estimating the term…
Abstract
A digital switching device of the stored program type operating under the control of a central control unit has an input time switching stage, an output time switching stage, and a space switching stage intermediate the time switching stages. Each time switching stage has a connection store for controlling reading of data from said stages, and the space switching stage includes comparators for comparing the contents of the connection stores. The space switch is controlled on the basis of the comparison.
Claims8
A digital switching device for switching input digital signals under the control of a central control unit, said device having:
- an input time switching stage,
- an output time switching stage,
- a space switching stage intermediate the input and output time switching stages,
- each time switching stage including a connection store for controlling reading of data signals from its respective time switching stage, and
- said space switching stage including comparing means for comparing the contents of the connection stores of the time switching stages, the operation of the space switching stage being controlled on the basis of said comparison.
2 more elements
Dependencies are inferred from the claim text.