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| Number | Title | Issue Date |
| 8144574 | Distributed control packet processing Packet switch operating methods and packet switches, using first processing circuitry of the packet switch, specify a configuration for a control packet processing procedure implemented by different second processing circuitry of the packet switch, communicate the c... | 03/27/2012 |
| 7924883 | Network architecture for intelligent network elements The present system uses point-to-point data links between intelligent network elements located in the feeder/distribution network to provide reliable, secure, bi-directional broadband access. Digital signals are terminated at the intelligent network elements, switch... | 04/12/2011 |
| 7924705 | Method and system for span-based connection aggregation The present invention provides a method and system for the restoration of an optical mesh network subsequent to the simultaneous failing of a large number of network connections due to a transmission failure. The system and method increase the restoration speed of a... | 04/12/2011 |
| 7920796 | DQPSK transmitter with parallel precoder and high-speed DQPSK data stream realignment The present invention utilizes field programmable gate arrays (FPGAs) to implement a parallel differential quadrature phase shift keying (DQPSK) precoder and a DQPSK optical transmitter with an automatic realignment process. The present invention can perform DQPSK p... | 04/05/2011 |
| 7920387 | Removable card guides for horizontal line cards A chassis for telecommunication gear including horizontal circuit boards includes an enclosure forming a front-accessible circuit board slot for receiving horizontal circuit boards. The circuit board slot has first connectors for receiving mating second connectors o... | 04/05/2011 |
| 7903981 | Software-based electro-optic modulator bias control systems and methods The present invention provides a software-based electro-optic modulator bias control system resident in an optical transceiver including an electro-optic modulator that includes an optical-to-electrical converter including a transimpedance amplifier, an analog-to-di... | 03/08/2011 |
| 7899334 | Signal distribution module for a directionless reconfigurable optical add/drop multiplexer The present invention provides a signal distribution module for use in a directionless reconfigurable optical add/drop multiplexer application, including: a multi-cast switch having a plurality of input ports and a plurality of output ports; a plurality of optical a... | 03/01/2011 |
| 7873638 | Apparatus and method for the collection and utilization of user selection in a content delivery environment A system and method for the collection, analysis, utilization, and/or reporting of user preference of content experienced by the user preferably for managing the distribution network of a content delivery environment, managing the selections of content available, re... | 01/18/2011 |
| 7873286 | Optical receiver systems and methods for polarization demultiplexing, PMD compensation, and DXPSK demodulation A simplified optical receiver architecture capable of tracking and demultiplexing polarization-multiplexed signals, dynamically compensating for PMD using a variety of polarization controller technologies, and reducing the number of delay line demodulators by two fo... | 01/18/2011 |
| 7873274 | Methods and systems to stabilize an optical network against nodal gain changes The present invention provides methods and systems to stabilize an optical network against nodal gain changes through two nested control loops for controlling node gain and node output power. The present invention includes two nested control-loops running at differe... | 01/18/2011 |
| 7872843 | Telecom power distribution unit with integrated filtering and telecom shelf cooling mechanisms The present invention provides highly efficient system level EMI filtering in a dual feed Power Distribution Unit (PDU) using custom designed magnetic components that are uniquely designed to provide excellent performance under various load conditions. The PDU of th... | 01/18/2011 |
| 7869439 | Varying packet switch behavior based on a quantity of virtual interfaces associated with a virtual switch Packet switch operating methods and packet switches compare a quantity of virtual interfaces associated with a virtual switch to a threshold. If the quantity of virtual interfaces is not greater than the threshold, and the packet switch is configured to learn forwar... | 01/11/2011 |
| 7869394 | Limiting data packet forwarding to trusted ports This document describes tools that forward data packets to trusted ports and prevent data packets from egressing non-trusted ports. To do so, the tools receive a data packet having a destination address specifying that the data packet be forwarded to a set of ports ... | 01/11/2011 |
| 7869376 | Communicating an operational state of a transport service This document describes tools that communicate an operational state of a transport service. The transport service provides connectivity between two or more networks, enabling the networks to exchange packets. The tools detect an operational state of a transport serv... | 01/11/2011 |
| 7864817 | Transport systems and methods incorporating absolute time references and selective buildout delays In various exemplary embodiments, the present invention provides transport systems and methods incorporating absolute time references, such as global positioning system (GPS) time references and/or the like, and selective buildout delays, such as first-in, first-out... | 01/04/2011 |
| 7853157 | Systems and methods for the polarization insensitive coherent detection and the polarization division multiplexed transmission of optical communication signals The present invention relates generally to the transport and processing of optical communication signals. More specifically, the present invention relates to systems and methods for the polarization insensitive coherent detection of optical communication signals wit... | 12/14/2010 |
| 7853156 | Systems and methods for the coherent non-differential detection of optical communication signals In various exemplary embodiments, the present invention provides coherent non-differential detection systems and methods for the detection of optical communication signals by the Brillouin fiber amplification of an optical communication signal carrier, the coherent ... | 12/14/2010 |
| 7852863 | System and methods for connections using automatically switched optical network control planes Systems and methods for connections on an Automatically Switched Optical Network (ASON) network including an ASON database and path computation algorithm, mechanisms for Ethernet connections over ASON, and mechanisms for label negotiation for SNCs are provided. Adva... | 12/14/2010 |
| 7839795 | Carrier Ethernet with fault notification A method of fault notification in a carrier Ethernet having the capability of generating and transmitting OAM packets having flag fields, comprises inserting a bit in one of the flag fields to indicate the presence of service-affecting information in the OAM packets... | 11/23/2010 |
| 7839222 | Systems and methods using programmable fixed frequency digitally controlled oscillators for multirate low jitter frequency synthesis The disclosure provides systems and methods for programmable fixed frequency digitally controlled oscillators for multirate low jitter frequency synthesis. The present invention utilizes a digital control element, such as a complex programmable logic device (CPLD) o... | 11/23/2010 |
| 7835379 | Network architecture for intelligent network elements The present system uses point-to-point data links between intelligent network elements located in the feeder/distribution network to provide reliable, secure, bidirectional broadband access. Digital signals are terminated at the intelligent network elements, switche... | 11/16/2010 |
| 7835362 | Methods and systems for the management of sequence-sensitive, connection-oriented traffic on a multi-link aggregated port The present invention provides methods and systems for the management of sequence-sensitive, connection-oriented traffic on a multi-link aggregated port. The methods include: at a first end of a multi-link aggregated port, selectively enabling a first constituent li... | 11/16/2010 |
| 7835297 | Determining the state of a tunnel with respect to a control protocol Element managers and processes retrieve information from a first packet switch. The information is derived from layer-two (data link layer) control packets relayed from a second packet switch to the first packet switch via a tunnel. The layer-two control packets con... | 11/16/2010 |
| 7830909 | Transparent sub-wavelength network An arrangement that allows transmission of client signals with higher clock fidelity is achieved by developing a phase offset measure at an ingress node, communicating it to the egress node, and recovering the client's clock from the received data and from the recei... | 11/09/2010 |
| 7830883 | Modifying duplicate packets to have different transport formats This invention includes methods and packet switches that modify duplicate packets to have different transport formats. A packet switch receives a plurality of duplicate packets from a switching fabric and modifies two or more of the duplicate packets so that the mod... | 11/09/2010 |
| 7796501 | System and methods for redundant switch fabric and switch controller The present invention combines switching and control functions on a single module while avoiding requirements to synchronize working and standby switch configuration information. The present invention eliminates the idea of redundant working and standby control/swit... | 09/14/2010 |
| 7791792 | Transient optical power suppressing apparatus, method, and network An apparatus for suppressing optical power transients includes a variable optical attenuator receiving an input optical signal and outputting an output optical signal; an optical power sensing element coupled to the input optical signal and sensing a portion of the ... | 09/07/2010 |
| 7783206 | System and method for multi-rate, high-sensitivity clock and data recovery with adjustable decision threshold, RF input, and optical-to-electrical conversion The present invention provides a system and method for multi-rate, high-sensitivity CDR, including a variable/adjustable decision threshold, RF input clock recovery, and OE conversion feature. The system includes an optical input connector, CDR circuit, decision thr... | 08/24/2010 |
| 7782856 | Forwarding data packets having tags conforming to different formats This document describes tools that forward data packets having tags conforming to different formats. In one embodiment, the tools receive a data packet on each of a plurality of ports, each data packet comprising a tag conforming to a different format. The tools rel... | 08/24/2010 |
| 7780361 | Card guide and heatsink assemblies for pluggable electro-optic modules In various exemplary embodiments, the present invention provides improved card guide and heatsink assemblies for pluggable electro-optic modules utilized in optical communications networks and the like. More specifically, the present invention provides a solderable ... | 08/24/2010 |
| 7778201 | Determining a logical neighbor of a network element Element managers and processes receive, from a selected network element, first neighbor information describing a first neighboring network element directly connected to the selected network element and second neighbor information describing a different second neighb... | 08/17/2010 |
| 7773541 | Obtaining identification information for a neighboring network element If a selected packet switch connected to a neighboring packet switch makes first information identifying the neighboring packet switch available, element managers and processes retrieve the first information from the selected packet switch. The first information is ... | 08/10/2010 |
| 7764621 | Packet loopback methods and replacing a destination address with a source address Packet switch operating methods and packet switches receive a packet on a first port of the packet switch. The packet is addressed to a device that is in communication with a second port of forwarding circuitry of the packet switch and the packet has an Ethernet des... | 07/27/2010 |
| 7760723 | Relaying a data stream from a data device to a network tunnel This document describes tools useful in relaying a data stream from a data device to a network tunnel. These tools may utilize an encapsulation scheme to convert data packets from a user format to a tunnel format required by a network tunnel. Similarly, the tools ma... | 07/20/2010 |
| 7746909 | Method and systems for optimizing laser and electro-absorption modulator performance for long-haul optical transmission The present invention provides a compact, low cost integrated continuous wave (CW) laser/electro-absorption (EA) modulator solution that supports the non-return to zero (NRZ) modulation format for long-haul optical transmission that results in high output extinction... | 06/29/2010 |
| 7734174 | System and method for a channel guard in a reconfigurable optical add-drop multiplexer The present invention provides a colorless multiplexing system and method for detecting new optical channels at power levels below that which would cause data errors in existing traffic, and on top of background light, thus, overcoming a known risk inherent in color... | 06/08/2010 |
| 7734126 | Systems and methods for chirp control of a dual arm z-modulator to minimize dispersion effect of fiber plant The present invention provides systems and methods for chirp control of a dual arm Z-modulator to minimize dispersion in the fiber plant. The chirp control is based upon a real-time control loop based upon performance monitoring data between a transmitter and a rece... | 06/08/2010 |
| 7733999 | System and method for an adaptable timing recovery architecture for critically-timed transport applications The present invention provides a timing recovery architecture and circuit for recovering the clock timing from a received signal in critically-timed transport applications. The present invention further relates to a timing recovery architecture and circuit for remov... | 06/08/2010 |
| 7733768 | Multiple bundle identification for calculation of a network protect path responsive to shared resources Protection and working routes are determined responsive to shared resources. The administrative weight value of a route can correspond to the physical distance associated with that route. Once the administrative weight values are assigned, that route having the lowe... | 06/08/2010 |
| 7733193 | Systems and methods for DQPSK modulator control using selectively inserted dither tone DQPSK modulator control is provided using a single monitor photodiode with a selectively injected dither tone. The dither tone signal is sequentially injected into arm modulators and/or to a modulator driver port in time slots. A tapped signal at the output of the m... | 06/08/2010 |
