Abstract: A device (1) for delivering a signal switching from a first state to a second state, comprising: a primary circuit (4) generating a primary signal; and a secondary circuit (6) configured to: when the primary signal is initialized to the second state upon power-up, initialize a ring counter (16) to a random value in a finite sequence including a reference value, change the value of the first ring counter (16) by running through the first finite sequence in a circular fashion, and deliver at an output (3): i) a secondary signal in the first state, when the value of the first counter is different from the reference value, and ii) the primary signal, when the value of the first counter is equal to the reference value.

Abstract: A device (1) for delivering a signal (por_out) switching from a first state to a second state, comprising: a primary circuit (4) generating a primary signal (por_ana); and a secondary circuit (6) configured to: when the primary signal (por_ana) is initialized to the second state upon power-up, initialize a ring counter (16) to a random value comprised in a finite sequence comprising a reference value (INIT), change the value of the first ring counter (16) by running through the first finite sequence in a circular fashion, deliver at an output (3): i) a secondary signal in the first state, when the value of the first counter is different from the reference value (INIT), and ii) the primary signal (por_ana), when the value of the first counter is equal to the reference value (INIT).

Abstract: The invention relates to a digital device for detecting the hold by an apparatus of a telephone line into which is plugged a modem employing band superposition transmission, the modem sending a send signal on the telephone line and receiving from this line a digitized reception signal, characterized in that the said device comprises: a means for providing a parameter of the transfer function of the send signal on the reception signal, the said parameter being characteristic of the presence of at least the said apparatus on the line, control means for controlling the interruption of the exchanges of signals of the modem on the line, the said control being dependent on the said parameter of the transfer function. The invention also relates to the method implemented by the device of the invention, a modem comprising this device and a server of an Internet access provider using such a modem.