H - Electricity – 04 – L
Patent
H - Electricity
04
L
340/80
H04L 5/14 (2006.01)
Patent
CA 2008947
ABSTRACT METHOD FOR THE TRANSMISSION OF DATA OR COMMANDS AND DEVICE FOR CARRYING OUT SAID METHOD The method for the transmission of data or commands, in alternating duplex mode between a first port (2) connected to a first pair of transmission lines, and a second port (3) connected to a second pair of trans- mission lines, comprises: a step (A) of detection and processing of data at the input of either of the said ports, then designated as the input port, the other port being designated as the output port, followed by a step (B) of blocking any transmission of possible signals coming from the output port towards the input port, a step (C) of transmission of the said data from the input port to the output port when data are detected at the input of the input port, and in the opposite case fol- lowed by a step (D) of blocking the transmission of all possible signals from the input port to the output port, leading to step (A) again. The data presented to any of the said ports are in the form of an amplitude modulation of an alternating carrier signal having a predetermined carrier frequency, and the step (A) of detection and processing comprises a step of identification of the predetermined carrier frequency and a step of extraction of a useful signal representative of the said data to be trans- mitted. (See Figure 1)
Bereskin & Parr
Demarais Gerard
Faiveley Transport
LandOfFree
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