Patents Assigned to NEC America, Inc.
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Publication number: 20080199189Abstract: A colorless optical DQPSK demodulator and system operating over multiple, equally-spaced DWDM channels with fixed optical delays—capable of demodulating DQPSK within signals within DWDM communications wave bands on ITU grids using delay interferometers having fixed free spectral range at 20 GHz or 25 GHz.Type: ApplicationFiled: February 20, 2007Publication date: August 21, 2008Applicant: NEC AMERICA INC.Inventors: Lei XU, Philip Nan JI, Jianjun YU, Milorad CVIJETIC, Yutaka YANO, Tsutomu TAJIMA, Shinya NAKAMURA, Ting Wang
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Patent number: 7124156Abstract: A power of a square matrix is determined in a time approximately proportional to the upper integer of the base-2 logarithm of the order of the matrix. A preferred embodiment uses two types of look-up tables and two multipliers for a matrix of 15Ă—15, and is applied to a pseudorandom noise (PN) sequence phase correlation or state jumping circuit. An exact state of a PN code can be determined or calculated from applying an appropriate offset value into a control circuit. The control circuit can produce a PN sequence state from the offset value and typically does so within one system clock period regardless of the amount of the offset. Once the exact state is determined, it is loaded into a state generator or linear sequence shift register (LSSR) for generating a subsequent stream of bits or symbols of the PN code. The PN generator system may include state computing logic, a maximum length PN generator, a zero insertion circuit and a zero insertion skipping circuit.Type: GrantFiled: January 10, 2003Date of Patent: October 17, 2006Assignee: NEC America, Inc.Inventors: Gang Yang, Ning Zhang
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Publication number: 20050243809Abstract: There is provided a method and system for deploying a VoIP telephone system to a location, the VoIP telephone system including a server for managing communication to and from one or more VoIP telephones via a network, comprising: collecting information associated with a dial plan for a plurality of users for location and updating the dial plan; automatically generating a plurality of output data files comprising data from the dial plan, each output data file being generated for each unique combination of VoIP telephone type, number of extensions per VoIP telephone and calling search space for the location; and configuring the server of the VoIP system via each unique output data file.Type: ApplicationFiled: April 28, 2004Publication date: November 3, 2005Applicant: NEC America, Inc.Inventors: James Best, Chris Rajczi
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Publication number: 20040139133Abstract: A power of a square matrix is determined in a time approximately proportional to the upper integer of the base—2 logarithm of the order of the matrix. A preferred embodiment uses two types of look-up tables and two multipliers for a matrix of 15×15, and is applied to a pseudorandom noise (PN) sequence phase correlation or state jumping circuit. An exact state of a PN code can be determined or calculated from applying an appropriate offset value into a control circuit. The control circuit can produce a PN sequence state from the offset value and typically does so within one system clock period regardless of the amount of the offset. Once the exact state is determined, it is loaded into a state generator or linear sequence shift register (LSSR) for generating a subsequent stream of bits or symbols of the PN code. The PN generator system may include state computing logic, a maximum length PN generator, a zero insertion circuit and a zero insertion skipping circuit.Type: ApplicationFiled: January 10, 2003Publication date: July 15, 2004Applicant: NEC America, Inc.Inventors: Gang Yang, Ning Zhang
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Patent number: 6728210Abstract: A multi-logical access for a serial data link designed with a multi-logical serial interface protocol which permits multi-drop applications to communicate in a time division multiplex mode over a singular drop or physical serial link such as an RS-232 link. Data is exchanged over the serial data link between multiple applications on a transmitter side of the serial data link and multiple applications on a receiver side of the serial data link. Both the transmitter and the receiver have a link layer connected to the serial data link for handling the transmission/receiving of packets through the serial data link, for detecting the start/end of each packet, and to ensure the sequence of the packets. Both the transmitter and the receiver also have a relay layer connected between the multiple applications and the link layer, which operates to allow the different access functions to share the serial data link.Type: GrantFiled: December 21, 1998Date of Patent: April 27, 2004Assignee: NEC America, Inc.Inventors: Roland El-Khoury, Feng Mo
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Patent number: 6721414Abstract: An article of manufacture is provided including a computer usable medium having a computer readable program code device embodied therein for graphically representing and managing a telecommunications cable system. Managing includes tracking all hardware components contained in the telecommunications cable system and the capacity of each hardware component. Preferably, the cable system includes a PBX switch and master database, and at least one adjunct system and database. The computer readable program code device interacts with the master database, which contains a copy of information contained in each PBX, adjunct system and each adjunct system and respective database, and provides a user with an ability to track all telecommunications system cabling and hardware components by unique identification number stored in a cable manager database by type.Type: GrantFiled: August 17, 1999Date of Patent: April 13, 2004Assignee: NEC America, Inc.Inventors: Michael J. Rojas, Amlan Dasgupta, Timothy F. Corbett
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Patent number: 6708044Abstract: A method and apparatus for providing time-critical band selection in a communication device with dual band or multi-band switching, or, alternatively, for providing dual mode or multi-mode time critical operating ability. The mobile station typically has a transmitter section and a receiver section each capable of dual modes of operation, a frequency synthesizer and a controller. The band to band operating method utilizes a frequency command data signal where data derived from the signal is used in a determinable bit stream of data including a frequency data word. The frequency data word is used for defining an operational state of the synthesizer frequency thereby implementing the transceiver's operating channel. At least one bit (or functional bits) from within the bit stream or received signal is used for defining, at least momentarily, the transceiver's “new” operating band (or state).Type: GrantFiled: April 4, 2000Date of Patent: March 16, 2004Assignee: NEC America, Inc.Inventors: William Puknat, Mukesh Patel, Dongan Zhang
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Patent number: 6625272Abstract: A computer readable program code comprising creating and managing a master database for maintaining a copy of information contained in at least one PBX and adjunct system databases; providing a single user interface for entering data into the master database and the at least one PBX and adjunct system databases; configuring and managing a plurality of data properties for each of said at least one PBX and adjunct system; processing communications between the master database and the at least one PBX and adjunct system managing function through the single user interface, including message handling that includes a table of application handles, a table of associations between message types and message handles hashed by message types, a table of associations between message types and message handles hashed by application handle, and message packets.Type: GrantFiled: September 24, 2001Date of Patent: September 23, 2003Assignee: NEC America, Inc.Inventor: Michael J. Rojas
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Patent number: 6580709Abstract: A SONET network interface for interconnecting a high speed unit (HSU) with low speed interface units (LSUs) is provided for enabling transmission of signals therebetween. The interface includes: a bus for interfacing the HSU with each of the LSUs to enable transmission of signals from each of the LSUs to the HSU, and reception of the signals from the HSU to each of the LSUs, wherein the HSU, LSUs, and the bus are contained in a primary shelf. The network interface also has secondary shelves, each containing secondary LSUs and an intershelf ring interconnection (IRI) bus connecting the primary shelf and each of the secondary shelves in series for exchanging data between the HSU of the primary shelf and each of the secondary shelves.Type: GrantFiled: March 31, 1999Date of Patent: June 17, 2003Assignee: NEC America, Inc.Inventors: Steven Scott Gorshe, Robert Wesley Brooks
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Patent number: 6529599Abstract: In a telephone system having multiple working metallic interface units, a method and a structure provide protection by assigning to each metallic interface unit a partner unit, which is another metallic interface unit. Under this arrangement, when a failure occurs in a working metallic interface unit, its partner unit switches the ring/tip input signals of the failed metallic interface unit to a protection bus. A standby or protective unit then takes over by receiving the rerouted tip/ring signals from the protection bus. The failed working unit can then be removed from the shelf without disrupting service.Type: GrantFiled: July 7, 1998Date of Patent: March 4, 2003Assignee: NEC America, Inc.Inventor: Steven S. Gorshe
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Patent number: 6504924Abstract: A telecommunication management system drawn to processing communication between a client application single user interface, a master database, and a PBX and adjunct system, comprising connecting to the client application single user interface through a first communication channel; registering a client application; adding a second communication channel; subscribing to one or more message events from a sender; reading and posting the subscribed one or more message events; and disconnecting from the client application single user interface.Type: GrantFiled: September 24, 2001Date of Patent: January 7, 2003Assignee: NEC America, Inc.Inventor: Michael J. Rojas
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Patent number: 6504443Abstract: A voltage controlled oscillator circuit in which the principal frequency determining circuit or tuning circuit comprises a pair of common anode varactor diodes. The circuit functions as a variable frequency oscillator controlled by an external DC control voltage, when utilized in conjunction with a parallel connected inductor and bypass or coupling capacitors to an oscillator circuit. This circuit has applicability as a basic building block or subcircuit for use in frequency synthesizer circuits, filter circuits, or the like, and which operate in baseband, I/F or R/F. The oscillator is a type which can be used in cellular or handheld telephones, both digital and analog, and in radio or communication equipment in general. The tuning circuit is symmetrical in form, and can isolate direct current (DC) paths of the tuning circuit from the alternating current (AC) or I/F or R/F current paths of the connected active circuit or drive circuit.Type: GrantFiled: May 17, 2000Date of Patent: January 7, 2003Assignee: NEC America, Inc.,Inventor: Antonio L. Eguizabal
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Patent number: 6498839Abstract: An article of manufacture including a computer usable medium having software embodied therein for managing at least one telephone system having a PBX switch and database and at least one adjunct system and database.Type: GrantFiled: January 12, 2001Date of Patent: December 24, 2002Assignee: NEC America, Inc.Inventor: Michael J. Rojas
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Patent number: 6473504Abstract: A telecommunication management system drawn to configuring a Service Provider telemanagement program module by a client application, where the Service Provider supports multiple systems, the method steps comprise sending a request for Service Provider version information from the client application to a Service Provider; sending version information back to the client application from the Service Provider indicating a multiple system support; sending a request to identify system support from the client application to the Service Provider; sending a list of all supported systems back to the client application from the Service Provider; selecting a system for configuration; sending a request for selected system version information from the client application to the selected Service Provider; sending back system version information from the selected Service Provider to the client application; sending a request for all supported properties for the selected system from the client application to the Service ProviderType: GrantFiled: September 24, 2001Date of Patent: October 29, 2002Assignee: NEC America, Inc.Inventor: Michael J. Rojas
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Patent number: 6445786Abstract: A telecommunications management system that deploys a single-point-of-entry and synchronous database system. In addition to controlling commonly used PBX systems, the management system controls adjunct systems such as voice mail and 911 emergency systems by synchronizing the entry of data for a user from a telephone system into a master database for a single data record. The system also includes global synchronization in which a record-by-record comparison of the master database with the entries found in the telephone or adjunct system, or visa versa, is made. If the record is found, then the properties are updated with the information form either the master database or the telephone or adjunct system. The system includes the feature of synchronizing without update, which allows the user to see exactly what the manger will do to complete synchronization prior to synchronization taking place.Type: GrantFiled: September 24, 2001Date of Patent: September 3, 2002Assignee: NEC America, Inc.Inventor: Michael J. Rojas
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Patent number: 6411700Abstract: A telecommunications management system that deploys a unique Single-Point-of-Entry and Synchronous Data Base system. The system of the present invention is an integrated suite of system control and application software modules used to manage one or more telephone systems. In addition to controlling commonly used PBX systems, the invention controls adjunct systems such as voice mail and 911 emergency systems. The system of the invention ties its application modules and system control modules through a single point of entry and a synchronized database.Type: GrantFiled: October 30, 1998Date of Patent: June 25, 2002Assignee: NEC America, Inc.Inventor: Michael J. Rojas
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Patent number: 6314478Abstract: A circular queue system is implemented using either a ‘mirror space’ appended to the circular portion of the queue (or buffer) or an ‘borrow’ space appended to the circular portion of the queue (or buffer). In each implementation, address verification or checking within the queue is not implemented until such time as the read or write portion to the queue has substantially completed. Where the address would normally exceed the physical or logical end address of the circular queue, the ‘mirror space’ or ‘borrow’ space provides sufficient storage to prevent overflow into other valid data.Type: GrantFiled: December 29, 1998Date of Patent: November 6, 2001Assignee: NEC America, Inc.Inventor: William R. Etcheverry
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Patent number: 6314283Abstract: A cellular phone subsidy lock which ensures that a cellular phone, sold to an end-user at a price subsidized by a cellular carrier, is activated only on the subsidizing carrier's network, and not on a competitor's network. A secure carrier code, specific to and known by the subsidizing carrier, is programed into the cellular phone by the phone manufacturer. The phone is programmed and shipped by the manufacturer in a locked condition, which prevents programming of the NAM (Number Assignment Module) of the cellular phone without first entering either a valid unlock code or a valid remove lock code. At the time of phone activation and programming of the NAM, the phone's ESN (Electronic Serial Number) is entered into the carrier computer system, which utilizes the ESN and carrier code to execute a subsidy lock algorithm which outputs an unlock code and a remove lock code. At the carrier's choice, either code is given to the end user to be entered into the phone.Type: GrantFiled: April 28, 1999Date of Patent: November 6, 2001Assignee: NEC America, Inc.Inventor: Ronald L. Fielden
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Publication number: 20010025258Abstract: The invention is a method and system for providing product support services. The invention allows for access to product support services by non-typical parties and also allows for varying cost structures. A first party is authorized by a product support service provider to receive product support services by request of login identification and passwords. The first party is provided with tokens to purchase and authorized to allocate the tokens to any other party at its discretion. The tokens are accepted by the support service provider in exchange for support services.Type: ApplicationFiled: February 16, 2001Publication date: September 27, 2001Applicant: NEC America, Inc.Inventors: Victor T. Foia, James W. Watson
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Patent number: 6185083Abstract: A protected telecommunications test adapter for use in troubleshooting telephone networks. The test adapter plugs into an industry standard panel and provides access to the network wiring via an RJ11 connector or clip posts. The test adapter has a surge protector to protect both user and equipment. The test adapter is of a modular enclosed housing design for portability and low manufacturing cost. Since the test adapter is intended for temporary test installation, its dimension is designed for ease of removal, installation, and access to the test connector or posts.Type: GrantFiled: December 11, 1998Date of Patent: February 6, 2001Assignee: NEC America, Inc.Inventors: Randall E. Mathieu, William R. Olsen