Did You Know...
...that several people are credited with the invention of the flush toilet? Most people have heard of Thomas Crapper (1837-1910), the sanitary engineer who invented the valve-and-siphon arrangement that made the modern toilet possible. Another claimant to "the throne" was British inventor Alexander Cumming who patented a toilet in 1775. Then there's a nameless Minoan (a native of ancient Crete) who lived 4,000 years ago who supposedly was ahead of his time and created the first flush toilet!
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| Number | Title | Issue Date |
| 8184971 | Optimization mechanism for use with an optical control plane in a DWDM network Methods and apparatus for efficiently utilizing an optical control plane distinct from an electronic control plane to facilitate the setup of paths in a dense wave division multiplexing network are disclosed. According to one aspect of the present invention, a metho... | 05/22/2012 |
| 8180216 | Latency measurement in optical networks A device for measuring optical latency in a test path includes an optical source to generate an optical signal. An optical modulator modulates the optical signal based on a modulation signal. An output port outputs the modulated optical signal to the test path. An i... | 05/15/2012 |
| 8180217 | Method for coordinating measurements and calibrations in a passive optical network Method for coordinating measurements and calibrations in a passive optical network, PON, in particular in a Gigabit PON, the method comprising: generating, in an optical line termination (3), OLT, a downstream frame (25), transmitting the downstream fr... | 05/15/2012 |
| 8170414 | Burst mode digital diagnostic and control for passive optical network receiving Methods and systems for an optical line termination including instructions stored on a computer-readable medium, the instructions including a digital diagnostic table, and a plurality of entries within the diagnostic table, wherein a first entry is associated with a... | 05/01/2012 |
| 8165465 | Apparatus and method of controlling tap coefficient of transversal filer, optical receiver apparatus, and optical communication system An apparatus includes an oscillator circuit configured to generate a certain oscillation signal, an adder configured to add the oscillation signal to the tap coefficient of any of one or more taps of the transversal filter, a signal-quality measurer configured to me... | 04/24/2012 |
| 8155518 | Dynamic load balancing of fibre channel traffic Systems and methods herein provide for load balancing Fiber Channel traffic. In this regard, a Fiber Channel load balancer may be operable to monitor Fiber Channel paths coupled to a host bus adapter and determine the speeds of the Fiber Channel ports within the Fib... | 04/10/2012 |
| 8145055 | Passive optical network system, optical line terminator and optical network unit In a PON, at the time of ranging, an OLT (a master station) measures an optical level of a signal from at least an ONU (a slave station) capable of communicating at plural transmission speeds. The OLT determines the transmission speed applied to the ONU according to... | 03/27/2012 |
| 8131148 | Optical transmitter error reduction using receiver feedback Described is a method of reducing transmitter error in an optical communications channel. An optical signal transmitted from an optical transmitter that has impairment due to transmitter error is processed to generate a digitally-equalized signal. A nonlinear charac... | 03/06/2012 |
| 8098988 | Optical add/drop multiplexer A disclosed optical add/drop multiplexing device demultiplexes a first signal into multiple signals according to wavelengths, drops one or more of the demultiplexed signals to a transponder, adds one or more signals output from the transponder, multiplexes these sig... | 01/17/2012 |
| 8095004 | Passive optical network system and operation method of the same In a passive optical network system, in order that by measuring a transmission distance and a transmission time between an OLT and an ONU in operation of the system, if the distance or the time is short, communication is conducted at a high transmission speed to inc... | 01/10/2012 |
| 8086100 | Optoelectronic transceiver with digital diagnostics The optoelectronic transceiver includes an optoelectronic transmitter, an optoelectronic receiver, memory, and an interface. The memory is configured to store digital values representative of operating conditions of the optoelectronic transceiver. The interface is c... | 12/27/2011 |
| 8064764 | Optical network terminal agent A method is provided including the steps of monitoring at least one performance metric of at least one network component in an optical network system, determining whether the at least one network component is a rogue network component using the at least one performa... | 11/22/2011 |
| 8055128 | Methods and systems for optimal launch power computation in meshed optical networks The present invention provides methods and systems for efficiently computing optimal optical launch powers for meshed optical networks. The present invention can be utilized to find optimal launch powers for multiple wavelengths in a meshed dense-wave division multi... | 11/08/2011 |
| 8050557 | Transmission system and system startup method An exemplary aspect of the invention is a transmitter for transmitting an optical signal, comprising a level comparing unit for measuring an input level of an entered optical signal, and determining whether the input level has exceeded a preset level and a controlle... | 11/01/2011 |
| 8041211 | Optical signal quality monitoring apparatus and method A sampling optical pulse generation unit emits a sampling optical pulse. The sampling optical pulse has a period different from a predetermined offset time to integral multiplication of a clock period of a data signal, and the data signal modulates an optical signal... | 10/18/2011 |
| 8032021 | Status link for multi-channel optical communication systems A robust and redundant status link is established by a first multi-channel optoelectronic device with a second multi-channel optoelectronic device in a multi-channel communication link. Transmitter bias currents are effectively modulated with a status link modulatio... | 10/04/2011 |
| 8019218 | Optical signal monitoring apparatus and method An optical signal monitoring apparatus includes an optical interference unit, a sampling optical pulse generation unit, an optical sampling unit, a photoelectric converter, and a computation unit. The optical interference unit includes an optical brancher, a delay d... | 09/13/2011 |
| 8000599 | Optical transmission system and optical transmission method In an optical transmission system, a transmitting transceiving node generates a multiplexed optical-packet signal by performing optical wavelength multiplexing on a plurality of optical packets, and transmits the multiplexed optical-packet signal to a receiving tran... | 08/16/2011 |
| 7995917 | Method and system for measuring optical properties of a medium using digital communication processing techniques A system for measuring properties of a medium includes an electromagnetic generator for forming a CW carrier, a digital encoder for forming a digital message, and a modulator for modulating the CW carrier with the digital message to form a digitally modulated CW car... | 08/09/2011 |
| 7983559 | Configurable multi-rate optical network port and processing modules Embodiments of the present invention provide an optical port that can be configured to support either high speed or low speed optical signals. In particular, these embodiments comprise a switch that defines a data-rate dependent path between the front-end optics of ... | 07/19/2011 |
| 7983558 | Optical control plane determination of lightpaths in a DWDM network An optical control plane (OCP) distinct from an electronic control plane helps the setup of path routes in a DWDM network. The OCP determines the optical feasibility of any path route selected by the electronic control plane, such as operated under GMPLS protocol, a... | 07/19/2011 |
| 7978972 | Optical line terminal and optical network terminal The optical line terminal has a PON transceiver including an error correction code decoder. The error correction decoder includes: a shortening compensation parameter table; and a syndrome calculator for calculating a syndrome by referring to the shortening compensa... | 07/12/2011 |
| 7957641 | Method of WDM channel tagging and monitoring, and apparatus Provided is an optical apparatus and method wherein power transfer coefficients arising from SRS are measured at a designated co-location point and the power of dithers, which are impressed on the channels of a multiplexed optical signal propagating through the opti... | 06/07/2011 |
| 7953320 | Systems and methods for determining an AC/DC cross-calibration coefficient A first signal shaper generates a first signal having a first asymmetry. A second signal shaper generates a second signal having a second asymmetry different from the first asymmetry. The first and second signals have approximately the same peak-to-peak amplitude. A... | 05/31/2011 |
| 7945158 | Transponder-less verification of the configuration of an optical network node A method, apparatus, and program, for evaluating an optical network node. The method comprises providing at least one communication path of the node with a capability by which lasing can occur in the communication path, and detecting whether lasing has been establis... | 05/17/2011 |
| 7925157 | Ranging method and system for passive optical network and optical network unit thereof A ranging method and system for passive optical network, and an optical network unit are provided. The ranging method includes: sending an initial ranging signal to a splitter loop-back device and recording a current sending time as a first time; receiving a loop-ba... | 04/12/2011 |
| 7925156 | Apparatus and method for measuring the quality of burst signals and performing optical line diagnostics Apparatus and method to measure the quality of burst signals and to perform optical line diagnostics in and optical passive optical network (PON). Statistical information about phase noise (jitter), signal distortion, clock distortions, and any other effects present... | 04/12/2011 |
| 7899323 | Multi-interface protocol analysis system A device may include a first network module to capture network data at a first location in a network and a second network module to capture network data at a second location in the network different from the first location in the network. The device may include a co... | 03/01/2011 |
| 7899324 | Method and apparatus for sampled optical signal monitoring Monitoring an optical signal comprises sampling the optical signal from two or more distinct tap points to retrieve a sample set. Multiple such sample sets are obtained over time. A joint probability distribution or phase portrait of the sample sets is assessed for ... | 03/01/2011 |
| 7889989 | Method for implementing tandem concatenation monitoring automatically and apparatus thereof A method for automatically implementing Tandem Concatenation Monitoring (TCM), includes: requesting a network management system for a required number of TCM levels; assigning an available TCM level to a pair of network nodes in a sub-network; performing TCM processi... | 02/15/2011 |
| 7885540 | Methods and apparatus for optical modulation amplitude measurement Techniques for measuring optical modulation amplitude (OMA) are disclosed. For example, a technique for measuring an OMA value associated with an input signal includes the following steps/operations. The input signal is applied to a photodetector, wherein the photod... | 02/08/2011 |
| 7881609 | Optical access system and ranging method for optical access system A ranging signal R1 generated by a signal generator and reaches to a signal checker via a working system transmission line, a loop circuit, and an auxiliary system transmission line. The signal checker measures a delay time from the generation to the arrival ... | 02/01/2011 |
| 7881608 | Methods and apparatuses for measuring jitter in a transceiver module Methods and apparatuses are provided for performing jitter measurements in a transceiver module. Accordingly, there is no need to use expensive test equipment that must be inserted into and removed from the network in order to obtain these measurements. In addition,... | 02/01/2011 |
| 7873272 | Optical pulse characterization using phase modulation An optical pulse monitor (OPM) that determines an optical phase profile for a pulse train by (i) modulating the optical phase of pulses in the pulse train using a periodic waveform and (ii) generating a derivative of a spectrum of the resulting modulated signal with... | 01/18/2011 |
| 7853145 | Optical switch and optical waveform monitoring apparatus According to an aspect of an embodiment, an optical switch comprises: a coupler for coupling a signal light and a control pulse; a first nonlinear medium for amplifying the signal light in accordance with the polar... | 12/14/2010 |
| 7835643 | Optical waveform measuring apparatus and optical waveform measuring method The present invention relates an optical waveform measuring apparatus designed to eliminate the polarization dependency of an intensity correlation signal without a polarization diversity arrangement. The apparatus comprises a sampling light outputting unit for outp... | 11/16/2010 |
| 7778544 | Method and device for monitoring an optical transmission line, especially an optical transmission line to an end subscriber of a transmission network A method for monitoring an optical transmission line in which digital optical signals are transmitted bidirectionally between a first and a second end point of the transmission line. At the first end point of the transmission line the digital optical signal to be tr... | 08/17/2010 |
| 7756418 | Passive optical network loss test apparatus and method of use thereof An apparatus and methods for testing a passive optical network with regard to fiber connectivity and attenuation losses, and with regard to the proper operation of packet-based communication protocols thereon. ... | 07/13/2010 |
| 7751707 | Method and system for controlling optical network A technique is described for controlling and optical network composed of network elements (NEs), with the aid of a network controller (NC) being in communication with the network elements. The technique includes collecting, by the network controller NC, information ... | 07/06/2010 |
| 7742697 | Efficient use of trusted third parties for additional content-sharing security Network elements are identified as being connected to optical nodes by instructing two network elements in a spectrum group of the CMTS to transmit at frequencies f1 and f2, respectively. Frequencies f1 and f2 are selected... | 06/22/2010 |
