Importance

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Abstract

The invention comprises a master device and slave, the signalling information containing identifying information aiming at identifying the slave device transmitting said signalling information, an optical communications network being adapted to enable in-band communications, an out-of-band communication channel being intended to enable transmissions of said signalling information with respect to the in-band communications, collisions occurring in the out-of-band communication channel when plural slave devices access the out-of-band communication channel by using respective carrier wavelengths that match each other. The master device transmits information representative at least of a mask that said slave devices have to apply to respective full identifiers so as to obtain respective reduced identifying information to be used by said slave devices within further signalling information to be respectively transmitted by said slave devices, the reduced identifying information aiming at containing enough bits to enable distinguishing the slave device from each other.

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First Claim