A system for detecting deterioration of or cuts C in a cable for transmitting signals between at least one first device A and at least one second device B, said system comprising the first device A and the second device B and a means adapted to know the propagation speed of the signal in said cable, characterized in that: said first device A being disposed at a first end (1 A) of the cable and comprising at least a transceiver (10e, 10r), synchronization means, means for communication between the first device A and the second device B, calculation means of non-reception of the signal connected to the transceiver (10e, 10r), the transmitter being adapted to transmit a signal S A from A to B, the receiver being adapted to measure times of non-reception of a signal, said second device B being disposed at a second end (1 B) of the cable, said second device B including at least the following components: a transceiver (20e, 20r), means for synchronizing and simultaneous transmission of the signal S A and the signal S B and means for communication between A and B, calculation means of non-reception of a signal connected to the transceiver (20e, 20r),), the transmitter being adapted to transmit a signal S B from B to A, the receiver being adapted to measure times of non-reception of a signal, the means for communicating (11, 21) times of non-reception of the signals measured at the receivers (10e, 20e) are adapted to transfer the measured times of non-reception of the signal S B at the first device A and the measured time of non-reception of the signal S A at the second device B to said calculation means of non-reception of a signal (13, 23), said calculation means being adapted to determine the time t C and the location X C of the fault or the cut in the cable from the measurements of abscissa X A of A, abscissa X B of B, the known speed of propagation V between point A and point B, the time tr B of disappearance of the signal measured by the receiver B of the signal S A and the time trA of disappearance of the signal measured by the receiver A of the Signal S B. said first device A being disposed at a first end (1 A) of the cable and comprising at least a transceiver (10e, 10r), synchronization means, means for communication between the first device A and the second device B, calculation means of non-reception of the signal connected to the transceiver (10e, 10r), the transmitter being adapted to transmit a signal S A from A to B, the receiver being adapted to measure times of non-reception of a signal, said second device B being disposed at a second end (1 B) of the cable, said second device B including at least the following components: a transceiver (20e, 20r), means for synchronizing and simultaneous transmission of the signal S A and the signal S B and means for communication between A and B, calculation means of non-reception of a signal connected to the transceiver (20e, 20r),), the transmitter being adapted to transmit a signal S B from B to A, the receiver being adapted to measure times of non-reception of a signal, the means for communicating (11, 21) times of non-reception of the signals measured at the receivers (10e, 20e) are adapted to transfer the measured times of non-reception of the signal S B at the first device A and the measured time of non-reception of the signal S A at the second device B to said calculation means of non-reception of a signal (13, 23), said calculation means being adapted to determine the time t C and the location X C of the fault or the cut in the cable from the measurements of abscissa X A of A, abscissa X B of B, the known speed of propagation V between point A and point B, the time tr B of disappearance of the signal measured by the receiver B of the signal S A and the time trA of disappearance of the signal measured by the receiver A of the Signal S B.