Le Material Telephonique

Edouard M Issenmann

Bernard M Depouilly

The invention relates to a clock recovery system for a data receiver. The system includes a ring counter connected to a flip-flop and a circuit for triggering the ring counter controlled by the first pulse of the transmitted signal.

Clock recovery system for data receiver

A telephone exchange signalling unit is provided having looping means for feeding back and comparing transmitted data multiplets directly with its input data. This test is ordered by the control unit of the telephone exchange without the necessity of using wires other than the distribution and scan wires of the telephone exchange and the signalling unit.

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Versailles, France

Edouard M Issenmann