Wavelength division multiplex optical ring network for transmitting protected signals by local state switching following local interruption detection
First Claim
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 adapted, in the event of local detection of interruption of signal transmission at a first wavelength on said first optical fiber portion, to send the signals coming from said terminal to said second multiplexer at a second 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 adapted to 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 adapted in the event of local detection of signal interruption to send said first and second action means local state instructions so that they assume said second add/drop state.
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Accused Products
Abstract
Wavelength division multiplex ring communication network equipment comprises 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. The equipment comprises signal protection circuitry connected to the first and second multiplexers and to a terminal which, in the event of local detection of interruption of signal transmission at a first wavelength on the first optical fiber portion, send the signals coming from the terminal to the second multiplexer at a second wavelength so that it communicates them to the second optical fiber portion, and sends to the terminal the signals that are addressed to it and that come from the second optical fiber portion at the second wavelength.
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Citations
6 Claims
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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 adapted, in the event of local detection of interruption of signal transmission at a first wavelength on said first optical fiber portion, to send the signals coming from said terminal to said second multiplexer at a second 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:
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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 adapted to 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 adapted in the event of local detection of signal interruption to send said first and second action means local state instructions so that they assume said second add/drop state. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification