Fine division telephone multiplexed switching network
AssigneeThomson-CSF
InventorsRobert Lyon-Caen, Pham Ngu Tung
Life of this patent
Estimating the term…
Abstract
A time division multiplexing system for telephone comprises a matrix of n.sup.2 two-state elements arranged in rows and in columns. The elements of the same row have respective inputs connected in parallel, these inputs being adapted for receiving telephonic frames. The elements of the same column have their respective outputs adapted for delivering telephonic frames. The n.sup.2 elements have respective control inputs for triggering from one conducting state to the other blocked state or vice-versa. These n.sup.2 control inputs are connected successively and cyclically to the n.sup.2 bistable elements of the successive columns, of a memory having p columns, by means of a shift register.
Claims5
A telephone switching system comprising n inputs capable of simultaneously receiving first frames of telephonic signals and n outputs capable of simultaneously delivering second frames of the same kind as said first, and connection means capable of connecting at will each of the n inputs to each said n outputs respectively, a connection matrix of n.sup.2 connection points for connecting always one input to one output and one only, each of said connection points being a two-state bistable element, said element being blocked in one of said states and conducting in the other, and having a control input for triggering them from one state to the other, a connection memory comprising p columns of n.sup.2 two-state bistable elements, each having an output, said control inputs being connected to said p .times. n.sup.2 outputs, a shift register addressing said p columns successively and cyclically, a control memory of n.sup.2 control elements having respective outputs, enabling the states of the p elements of a column to be triggered from one state to the other at any instant.
Dependencies are inferred from the claim text.