Switching network control arrangement
AssigneeBell Telephone Laboratories, Incorporated
InventorsDale E. Haben, Garry D. Kepley, Gordon L. Vander Molen
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Abstract
An arrangement tears down existing connection paths in a two stage switching network wherein switching paths are set up progressively by control circuits in both switching stages. A first-stage setup command is received by a first-stage control circuit and the second-stage control circuit of the previously established connection path. The first-stage control circuit responds to the first-stage setup command to set up a connection path through the first-stage switch and the second-stage control circuit responds to the first-stage setup command to tear down the previously established connection path.
Claims7
A method of operating a multiple stage switching network wherein a first switching stage includes a control circuit which receives control signals from an input terminal and other switching stages include control circuits which receive control signals via switching connections established through preceding switching stages comprising:
- (a) sending control signals to all control circuits associated with established switching connections;
- CHARACTERIZED IN THAT
- said method comprises the following additional steps:
- (b) performing a first operation on said switching connections in said first switching stage in response to said control signals;
- and
- (c) performing a second operation on said switching connections in at least one of said other switching stages in response to said control signals.
A switching network comprising an input terminal and a plurality of interconnecting switching stages wherein a first stage includes control means connected to said input terminal and each of the other stages includes control means connectible to said input terminal via switching connections previously established through a preceding switching stage;
- CHARACTERIZED IN THAT
- said control means of said first switching stage is responsive to defined control signals applied to said input terminal for performing a first operation on switching connections in said first switching stage and said control means of at least one of said other stages is responsive to said defined control signals applied to said input terminal for performing a second operation on switching connections in said one of said other switching stages.
Dependencies are inferred from the claim text.