Abstract: An optical sensing system for detecting fiber events along an optical cable under test (CUT) having forward and feedback fibers and multiple pairs of optical couplers interconnected along the forward and feedback fibers in a ladder topology. An optical transmitter generates an optical probing signal for a forward fiber, wherein the couplers along the forward fiber provide tapped portions of the probing signal to the couplers along a feedback fiber to form a combined optical feedback signal in the feedback fiber. A reference coupler is connected between the transmitter and the forward fiber to tap an optical reference signal from the probing signal, and a feedback coupler is connected to combine the reference signal and the feedback signal. An optical receiver receives and processes the combined reference and feedback signals from the feedback coupler to detect fiber events along the CUT.

Abstract: An optical sensing system for detecting fiber events along an optical cable under test (CUT) having forward and feedback fibers and multiple pairs of optical couplers interconnected along the forward and feedback fibers in a ladder topology. An optical transmitter generates an optical probing signal for a forward fiber, wherein the couplers along the forward fiber provide tapped portions of the probing signal to the couplers along a feedback fiber to form a combined optical feedback signal in the feedback fiber. A reference coupler is connected between the transmitter and the forward fiber to tap an optical reference signal from the probing signal, and a feedback coupler is connected to combine the reference signal and the feedback signal. An optical receiver receives and processes the combined reference and feedback signals from the feedback coupler to detect fiber events along the CUT.

Abstract: In order to reduce power consumption in network equipment for optical transmission networks, it is proposed by reducing E/O conversion and signal processing in optical networks when not needed. A network node has two or more line cards. Each line card contains a receive side transponder section with a network side optical receiver, a first electrical section, and a client side optical transmitter and a transmit side transponder section with a network side optical transmitter, a second electrical section, and a client side optical receiver. The first electrical section has at least one intermediate electrical output the second electrical section has at least one intermediate electrical input. The intermediate electrical outputs and inputs lead to an electrical switch matrix, which controllably interconnects the intermediate electrical outputs and inputs.

Abstract: The present invention refers to a method for reducing energy consumption in a packet processing linecard of a packet transmission network, said packet processing linecard comprising a plurality of microprocessors aimed at processing packet traffic wherein the number of active microprocessors is dynamically adjusted as a function of the computation of a traffic estimator based on a recurrent estimation of at least two statistical parameters including the average and a parameter representative of the statistical distribution of the packet traffic.

Abstract: In one embodiment, a network communication node receives data and includes a plurality of processors aimed at processing data at a given layer of communication so as to route them towards a given destination. The node determines at least one layer of communication for processing the received data.

Abstract: In order to reduce power consumption in network equipment for optical transmission networks, it is proposed by reducing E/O conversion and signal processing in optical networks when not needed. A network node has two or more line cards. Each line card contains a receive side transponder section with a network side optical receiver, a first electrical section, and a client side optical transmitter and a transmit side transponder section with a network side optical transmitter, a second electrical section, and a client side optical receiver. The first electrical section has at least one intermediate electrical output the second electrical section has at least one intermediate electrical input. The intermediate electrical outputs and inputs lead to an electrical switch matrix, which controllably interconnects the intermediate electrical outputs and inputs.

Abstract: The present invention refers to a method for reducing energy consumption in a packet processing linecard of a packet transmission network, said packet processing linecard comprising a plurality of microprocessors aimed at processing packet traffic wherein the number of active microprocessors is dynamically adjusted as a function of the computation of a traffic estimator based on a recurrent estimation of at least two statistical parameters including the average and a parameter representative of the statistical distribution of the packet traffic.

Abstract: A method for monitoring a system using optical reflectometry comprises: receiving a first optical response signal coming from the system in response to a first optical excitation signal, said first excitation signal carrying a first numeric sequence (A), receiving a second optical response signal coming from the system in response to a second optical excitation signal, said second excitation signal carrying a second numeric sequence (1A, B), and determining correlations between said optical response signals and said numeric sequences in order to detect a singularity of the system. The first and second excitation signals are transmitted simultaneously within the optical system on separate carrier wavelengths ?0, ?1) by wavelength division multiplexing, and the first and second response signals are received simultaneously on said separate carrier wavelengths.