Back to results
US 4,071,702 AGranted
Time division exchange and a method for the reconfiguration of this exchange
AssigneeThomson-CSF
InventorsPierre Charransol, Jacques Hauri, Serge Fontana
Life of this patent
Estimating the term…
Abstract
The invention relates to time-division exchanges in which the connection between the subscribers is established successively in time at the same rate as a sampling of telephone signals. It consists in offering to each subscriber circuit two incoming channels and two outgoing channels, the choice between which is made by a memory comprising an additional bit reserved for this choice.
Claims4
A time-division exchange for connecting a plurality of incoming subscriber circuits in a number of groups to a plurality of output subscriber circuits in a number of groups, said exchange comprising:
- at least three pairs of concentration means one each of said groups of incoming subscriber circuits being simultaneously connected to both concentration means of one each of said pairs of concentration means;
- at least three pairs of deconcentration means, one each of said groups of output subscriber circuits being simultaneously connected to both deconcentration means of one each of said pairs of deconcentration means;
- at least three interconnected switching means one each of said switching means being simultaneously connected to a first concentration means of one each of said pairs of concentration means, to a second concentration means of a different one each of said pairs of concentration means, to a first deconcentration means of one each of said pairs of deconcentration means, and to a second deconcentration means of a different one each of said pairs of deconcentration means;
- at least three concentration control means, each of said concentration control means being connected to said first and second concentration means so as to share the load in the event part of said exchange becomes inoperative;
- and
- at least three deconcentration control means, each of said deconcentration control means being connected to said first and second deconcentration means so as to share the load in the event part of said exchange becomes inoperative.
3 more elements
Dependencies are inferred from the claim text.