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Assignee: Fujitsu Network Communications, Inc.


Location: Richardson, TX
No. of patents: 126

1        
NumberTitleIssue Date
7483639Method and system for transmitting information in an optical communication system using distributed amplification
A method and system for transmitting information in an optical communication system includes modulating a non-intensity characteristic of an optical carrier signal with a data signal to generate an optical information signal. The optical information signal is transm...
01/27/2009
7289429System and method to perform non-service effecting bandwidth reservation using a reservation signaling protocol
A method to facilitate recovery of a node in a communications network is disclosed. The method comprises receiving one or more messages from at least another node in the communications network and restoring connectivity of a recovering node based at least in part on...
10/30/2007
6891836Switching complex architecture and operation
A system operable to communicate time-division multiplexed information and asynchronous transfer mode cells includes a primary rate switching fabric operable to receive a first plurality of transport signals and to switch the first plurality of transport signals at ...
05/10/2005
6879434Distributed raman amplifier for optical network and method
An optical ring is operable to transport traffic signals between nodes. A Raman pump source is coupled to the optical ring. The Raman pump source is operable to provide pump power to at least a portion of the optical fiber ring. Each node comprises an optical splitt...
04/12/2005
6876304Method and system for monitoring the thermal status of a card shelf
A method for monitoring the operating temperature of an item on a card shelf having a plurality of discrete electronic cards includes receiving a measured temperature for an item on a card shelf that is indicative of an operating temperature of the item. The method ...
04/05/2005
6862288Circuit reestablishment and tear down in a highly available communications system
A highly available communications system capable of circuit reestablishment and tear-down without manual intervention. The communications system includes a plurality of nodes interconnected by a plurality of communications paths to form at least one communications n...
03/01/2005
6856620Method and system for transporting packet-switched control traffic in an optical network
A method for transporting packet-switched control traffic in an optical network includes receiving a packet-switched datagram comprising a destination address. The method also includes identifying a destination Open Systems Interconnection (OSI) address of a destina...
02/15/2005
6842562Optical add/drop node and method
An add/drop node (OADN) comprises a network optical fiber carrying a signal on an optical network. A network drop splitter is coupled to the network optical fiber and to stages of drop splitters, the stages of drop splitters being operable to passively split an opti...
01/11/2005
6801545Container transport for packets in connection oriented protocols
A method and system for forwarding packets within containers in a data communication network. Each container may include packets or additional containers. Packets/containers are stored within containers in a predetermined format that includes a Type field, a Length ...
10/05/2004
6785285Method and system for providing broadcast channels over an emulated subnetwork
A method and system for communicating traffic on an emulated subnetwork of a telecommunications ring having a plurality of nodes interconnected by a transmission media includes obtaining traffic at a node on the telecommunications ring. The traffic is segmented into...
08/31/2004
6775424Modulation and filtration of optical signals
An optical modulator for generating an optical information signal includes a first modulator that modulates an optical carrier with a clock signal. The optical modulator further includes a filter that suppresses a residual carrier component of modulated optical sign...
08/10/2004
6775229Method and system for providing a protection path for connection-oriented signals in a telecommunications network
A system is provided for providing a protection path for connection-oriented signals in a telecommunications network comprising a plurality of nodes. The system includes a source node, a destination node and a penultimate node. The source node is operable to transmi...
08/10/2004
6760332ATM multicasting system and method
In an ATM communications system, a cell entering a switch fabric input port is routed to its destination output port and to a predetermined dedicated second output port. The second output port is connected by a feedback connection to a predetermined dedicated second...
07/06/2004
6727820Method and system for monitoring the thermal status of a card shelf
A method for monitoring the operating temperature within a card shelf having a plurality of discrete electronic cards includes receiving a first temperature indicative of an operating temperature of an item on one of the electronic cards. A second temperature indica...
04/27/2004
6721937Method and system for automated processor register instantiation
The invention includes an automated method for instantiation of a plurality of registers within an integrated circuit or integrated circuit device, including the computer-implemented steps of defining a programming language having a plurality of keywords identified ...
04/13/2004
6718384System and method for monitoring and maintaining a communication network
A system and method for monitoring and maintaining a communication network include the capability to determining connection and configuration parameters of network elements. The system and method also include the capability to monitor performance characteristics of ...
04/06/2004
6707962Method for providing signal power tilt compensation in optical transmission systems
In one embodiment, the present invention provides a method of transmitting an optical signal. This signal is transmitted through an optical fiber 12 (24) and is amplified by an optical amplifier 14 (22). The signal is then provided to an ...
03/16/2004
6708207Method and system for managing multiple management protocols in a network element
In accordance with one embodiment of the present invention, a network element comprises a first subsystem operable to receive management transactions in a first management protocol and to map the transactions to a common management protocol. A second subsystem is op...
03/16/2004
6700868Switching redundancy control
An apparatus and method for switching redundancy control which provides fast switching from a malfunctioning component to a redundant component with minimum data flow interruption for both transmitted and received data. The redundancy control system havin...
03/02/2004
6693909Method and system for transporting traffic in a packet-switched network
A method and system for transporting traffic in a packet-switched network segments high priority pass-through traffic from low priority pass-through traffic. The high priority pass-through traffic is transmitted on an egress link preferentially over the l...
02/17/2004
6690508Control system and method for an optical amplifier
A method and system for controlling the gain of the amplification of an optical signal is provided that includes both electrical feedforward and feedback. In a feedforward portion of an optical amplifier, the method includes receiving an optical signal an...
02/10/2004
6687651Real time estimation of equivalent bandwidth utilization
An apparatus and method for generating via integer calculations a metric for estimating link utilization within a network device having at least one output port. The metric is determined by calculating at least three data rate link parameters for a given ...
02/03/2004
6674751Serialized bus communication and control architecture
A serial bus communication system for communication across the backplane of a node includes a control unit having a serial bus controller. A plurality of service units each include a serial bus terminator. A serial bus includes a discrete serial channel f...
01/06/2004
6671271Sonet synchronous payload envelope pointer control system
A multiported integrated circuit performs pointer processing at the SONET STS and VT levels, and removes overhead information from a received electrical signal derived from an optical SONET signal. The integrated circuit operates to extract STM traffic an...
12/30/2003
6665301Transmission slot allocation method and map for virtual tunnels in a transmission line
In accordance with one embodiment of the present invention, a map of transmission slots for a port of a network element includes a plurality of hierarchical sets of port transmission slots. The hierarchical sets include a plurality of parent sets. Each pa...
12/16/2003
6661802Congestion management
Congestion management is provided using one or more receive queues organized into a queue list. Each queue is associated with a high water mark and a low water mark. The high water mark indicates a length at which the queue is considered congested. The lo...
12/09/2003
6658006System and method for communicating data using modified header bits to identify a port
A system includes a communication device that includes a number of interface cards and a switching complex. Upon receiving a data signal, an input card modifies header bits of the data signal to identify an input port on which the data signal was received...
12/02/2003
6650643Method and system for handling asynchronous transfer mode (ATM) call set-ups
The method for handling call set-ups in a telecommunication network includes receiving a request to set up a call. The method also includes comparing a dynamic load value for a switch to a load threshold for the switch. The method further includes allowin...
11/18/2003
6646985Congestion control mechanism in a network access device
A congestion control mechanism in an ATM network access device includes segmentation and reassembly (SAR) logic that sends and receives Asynchronous Transfer Mode (ATM) cells to and from interface logic that transfers the cells to and from a switch fabric...
11/11/2003
6631406Common management information base (MIB)
In accordance with one embodiment of the present invention, a network element comprises a first subsystem operable to receive management transactions in a first management protocol and to map the transactions to a common management protocol. A second subs...
10/07/2003
6628668Crosspoint switch bandwidth allocation management
A system for allocating bandwidth in a network element. The system determines whether a bandwidth allocation request is associated with a delay sensitive connection type. If so, the system selects a bandwidth allocation algorithm from a first set of bandw...
09/30/2003
6594234System and method for scheduling traffic for different classes of service
A system and method for maximum utilization of bandwidth of a resource incrementally adjusts in real time the allocated bandwidth per source queue per class of service based at least in part on the current status of a destination virtual output queue fill...
07/15/2003
6584119Dialable data services/TDM bandwidth management
A communications device and method for effectively managing bandwidth within a telecommunications network carrying both time division multiplexed signals as well as data signals. The communications device having dialable TDM/cell and/or packet-based bandw...
06/24/2003
6578153System and method for communications link calibration using a training packet
In one aspect, the present invention provides a method of communicating across a serial line 26. In this method, n parallel streams of data 30 are to be received at a destination 20. In a first embodiment, the n parallel streams of data 30 characterized i...
06/10/2003
6577412System and method of determining end point candidates for an optical channel in a data network
A method of determining end points for an optical channel in an optical network to off-load traffic from a target optical link is provided. The method includes the steps of identifying ingress network nodes sourcing traffic through the target optical link...
06/10/2003
6571358Integrated multiple services switch testing system
A system for integrated testing of one or more multi-service communications switches including a script execution environment for executing a test script. The script execution environment includes a hardware definition file storing a number of logical har...
05/27/2003
6539025Priority arbitration for point-to-point and multipoint transmission
An Asynchronous Transfer Mode switch and method which facilitate priority arbitration of point-to-point and point-to-multipoint transmission are disclosed. To execute point-to-multipoint operation a bandwidth arbiter maintains a first list of connections ...
03/25/2003
6527135Water resistant wall mount enclosure with pivoting removable cover
A water resistant enclosure providing protection to electrical or electronic equipment contained therein includes a three-sided removable cover pivotally coupled to a wall mounting bracket that includes a back panel-base plate combination. The three-sided...
03/04/2003
6515966System and method for application object transport
A method of facilitating traffic engineering services by communicating application objects over soft state process messages includes receiving an external soft state process initiating message at an ingress node to a core cloud, the core cloud comprising ...
02/04/2003
6510055Backplane and shelf arrangement with front access features
An electronic chassis providing front access for printed circuit board insertion and removal and for cable connectors. The electronic chassis includes a backplane assembly and a shelf assembly. The backplane assembly includes a motherboard having a first ...
01/21/2003
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