Patent ID: 7805072
Filing Date: 2010-09-28
Classification: H04J

Abstract:
1. Wavelength division multiplex ring communication network equipment comprising a first multiplexer connected to a first optical fiber portion dedicated to transporting multiplexed signals and a second multiplexer connected to a second optical fiber portion, said equipment comprising signal protection means connected to said first and second multiplexers and to a terminal and which, in the event of local detection of interruption of signal transmission at a first wavelength on said first optical fiber portion, send the signals coming from said terminal to said second multiplexer at a second wavelength that is different from said first wavelength, so that it communicates them to said second optical fiber portion, and to transmit to said terminal the signals that are addressed to it and that come from said second optical fiber portion at said second wavelength, which signal protection means comprise: signal distribution means connected to said terminal, first and second action means connected to said signal distribution means and to said first and second multiplexers, respectively, and which assume a first or transit state or a second or add/drop state for adding/dropping signals at said second wavelength as a function of local state instructions, said action means assuming by default their first transit state, and first add/drop means for signals at said first wavelength, connected to said signal distribution means, said first multiplexer, and said first and second action means, and which, in the event of local detection of signal interruption, send said first and second action means local state instructions so that they assume said second add/drop state.