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3COM Corporation Patents
Assignee:
3COM Corporation
Address:
Santa Clara, CA
No. of patents:
1426
Patents:


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Patent Number Title Of Patent Date Issued
6487171 Crossbar switching matrix with broadcast buffering November 26, 2002
A novel crossbar switching matrix that improves the transmission of variable length broadcast packets by greatly reducing transmission latency time. Unicast traffic is halted in the middle of packet transmission operations and the broadcast packet is transmitted. Once the broadcast p
6487168 Static switched virtual circuits in a connection oriented network November 26, 2002
A system for establishing static SVCs (i.e. permanent SVCs) whereby the results of the signaling/routing protocol generated when the network is first brought up are stored in a `permanent SVC` memory. The results of the signaling/protocol that were previously stored are restored from
6486994 Multi-directional infrared port and methods of using same November 26, 2002
Methods and apparatus for wirelessly communicating between a master and slave device with multi-directional infrared transmissions are provided. The master device is equipped with a multi-directional infrared (IR) port in the form of either a PCMCIA communications card, an infrared domed
6486810 Method and apparatus for continuously variable slope delta modulation coding of signals November 26, 2002
Continuously variable slope delta modulation coding uses a thresholder having an analog input and a digital output representing the relationship between a signal amplitude at the analog input and a predetermined threshold. An integrator has an output and one input connected to the ou
6486650 Frequency locked loop speed up November 26, 2002
In at least one implementation, a method is provided for testing a communication circuit having a clock recovery circuit. The method comprising initializing a voltage controlled oscillator to near an expected operating frequency upon power up of the clock recovery circuit by supplyin
6486450 Method and apparatus for inducing locally elevated temperatures in an application specific integ November 26, 2002
An application specific integrated circuit includes a multiplicity of operative circuit blocks. Disposed in at least one of the blocks is a multiplicity of selectively operative heater modules for providing localised heating within the block. The heater modules may comprise cyclic re
6486406 Latching apparatus and method for providing radial alignment of a housing mounted on a circuit b November 26, 2002
An apparatus and method for providing radial alignment of a housing mounted on a circuit board is provided. A mounting leg portion extends outward from a mounting surface of the housing. The mounting leg portion has a body portion, an end portion, and a radial alignment portion. The radi
6483904 Method and system for high-speed interface access to a computer network using a subscriber telep November 19, 2002
A method and system for providing a telephone subscriber line high-speed access to a computer network is described. The telephone subscriber line is provided telephone service through a network access equipment. The network access equipment includes a telephone line function interface,
6483869 Frequency decimated DMT modulation modem November 19, 2002
A sub-rate modulation method that is compatible with full-rate ADSL modems. The method may be used to implement a reduced complexity transceiver, preferably remotely located from the central office or service provider. The method includes instructing the full-rate modem to transmit data
6483808 Method of optimizing routing decisions over multiple parameters utilizing fuzzy logic November 19, 2002
A method of determining the optimum route from a source to a destination node in an ATM network utilizing fuzzy logic processing to determine the optimum route based on a set metrics that may or may not be related to each other. The invention utilizes well known fuzzy logic techniques to
6483712 Illuminating electrical jack system November 19, 2002
An electrical jack system is operable with an electrical plug, such as an RJ-type plug. In one embodiment, the electrical plug is at least partially translucent. The jack system includes a housing bounding a socket. The socket is configured to receive the electrical plug. A light source
6483600 System and method for communicating real-time facsimiles over data networks November 19, 2002
A system and method for communicating a facsimile reliably in real-time without using bandwidth inefficiently. A facsimile signal is created at a transmitting facsimile device and communicated to a transmitting gateway. The transmitting gateway demodulates the facsimile signal by using t
6483203 Single unit integrated transformer assembly November 19, 2002
A transformer unit includes a first isolation transformer, a second isolation transformer and a power transformer. A single package incorporates the first isolation transformer, the second isolation transformer and the power transformer. A plurality of connection pins provide connect
6482019 Retracting modular jack for portable appliance connections November 19, 2002
A modular jack, for coupling with a physical/electrical media plug, comprises a frame, a rocker arm, electrical contacts, and a retractable cover guard for protecting the electrical contacts during nonuse. The retractable cover guard moves from a protective position to a retracted po
6481681 Clip apparatus for a laptop computer November 19, 2002
A clip apparatus for a laptop computer includes a base member having a first end portion, a body portion, and a second end portion. The first end portion includes a flange portion for contacting a frame of a computer screen. The body portion includes an opening formed therein for receivi
6480891 Embedded code memory size reduction in asynchronous mode transfer devices November 12, 2002
A system for reducing the memory requirements of an ATM device utilizing one or more temporary code uploads to bring needed portions of application code into the memory of the ATM embedded system on a temporary basis. The present invention functions to divide the code necessary for opera
6477044 Flow guide November 5, 2002
A guide 2 for supporting a device in a flow of coolant includes a deflector 4 for modifying the coolant flow. The guide include apertures 6 so that the coolant can flow over both the upper and lower faces of a device, for example a printed circuit board 24.
6475003 Physically independent connector for retractable and removeable extensions in thin-profile elect November 5, 2002
The present invention relates to a removable and/or retractable extension for an electronic apparatus which is connected to the apparatus with a physically independent electrical connector which enables the extension to be retracted, extended, removed and replaced without connection or
6473552 Apparatus and method for signaling using a light pipe stylus October 29, 2002
Disclosed is a light pipe signaling device for signaling a user. A light pipe has a first end portion that fits into a receptacle. Both light pipe and receptacle are constructed using a transparent material. Light from a light source enters the receptacle and is transmitted to the light
6473408 Building a hierarchy in an asynchronous transfer mode PNNI network utilizing proxy SVCC-based RC October 29, 2002
A system of building a hierarchy in a PNNI based ATM network utilizing one or more proxy SVCC-based RCC entities. The invention separates the routing, signaling, etc. functions from the functions required to be performed by the peer group leader and the logical group node. A dedicated
6473076 Apparatus and method for controlling the power of a handheld computing device using a stylus October 29, 2002
An apparatus and method for controlling the power of a handheld computing device with a stylus is provided. A handheld computing device includes a power "on" state and a power "off" state. The handheld computing device further includes an elongated slot for receiving a stylus, and a swit
6470382 Method to dynamically attach, manage, and access a LAN-attached SCSI and netSCSI devices October 22, 2002
A method to dynamically attach, manage, and access a LAN-attached SCSI and netSCSI device to a network. In one embodiment, the present invention recites a method for dynamically attaching, managing, and accessing a netSCSI device coupled to a network. In one step, a broadcast message fro
6470022 Method of distributing network resources fairly between users in an asynchronous transfer mode n October 22, 2002
A method of distributing network resources fairly in an ATM network that is applicable in situations where a large number of clients establish connections to a single server. The method provides a way to more evenly distribute network resources when large number of clients desire con
6469681 Removable antenna for connection to miniature modular jacks October 22, 2002
The present invention relates to an antenna which is configured to plug into a retractable connector on an electronic apparatus. Some embodiments of the present invention may be configured to plug into common RJ-11 or RJ-45 jacks allowing devices equipped with these jack to utilize exter
6469668 Method and apparatus for connection to a rotatable antenna October 22, 2002
A hinged or rotatable antenna working in conjunction with a ground plane element which discloses a coaxial cable connection that maintains electrical contact between the ground plane element and the coaxial cable shielding through the use of a compression retainer block or plate. Some
6467002 Single cycle modified round-robin arbitration with embedded priority October 15, 2002
A method and system for priority arbitration in a computer environment having a shared resource capable of servicing a plurality of devices. In one embodiment, the present invention assigns an initial priority order to the plurality of devices such that those devices have priorities whic
6466957 Reduced computation system for wavelet transforms October 15, 2002
An improved architecture for efficiently calculating a discrete wavelet transform is presented. The present system appreciates the associated redundancies of calculations and proposes a topology for eliminating such redundant calculations through the use of storing and making such pr
6466571 Radius-based mobile internet protocol (IP) address-to-mobile identification number mapping for w October 15, 2002
A method of finding a mobile wireless communications device when an Internet Protocol (IP) packet from a remote user is sent to the device over an IP network. The mobile device does not have to register with the IP network in order to receive the IP. The method comprises the steps of
6466343 System for assigning wavelengths in a wave division multiplexing based optical switch October 15, 2002
A system for assigning wavelengths in an optical switch to enable unicast, broadcast and multicast traffic to be sent through the switch. The optical switch enables data to be switched in the optical domain as opposed to conventional switching in the electrical domain. This permits a ver
6463475 Method and device for tunnel switching October 8, 2002
A method and device for providing switched tunnel connections from a user to a destination or a multiple number of destinations. Tunnels are switched from a user to a destination by receiving an incoming tunnel connection from the user and initiating a switched tunnel connection to t
6463071 Method and system to communicate prioritized traffic via fixed length data communication frames October 8, 2002
A communications network operating in a data cable system that transmits a data over cable media access control (MAC) frame with an Ethernet/ISO8802-3 type packet protocol data unit payload. Time frames for transmission of data over the network are allocated to cable modems and time
6461170 Stacked electronic integrated card assembly with multi-function shared interface October 8, 2002
A computer card assembly for removeable insertion into a receiving/expansion slot of a host computer is presented. The computer card assembly facilitates the removal and recombination of at least one electronic card in an electronic card interface tray that includes a shared interfac
6457994 Media connector that allows electrical communication to be established with a media plug October 1, 2002
A media connector assembly with an extended electrical contact capable of non-destructive deflection when various media plugs are placed therein that do not accommodate each contact pin within the media connector. The media connector includes a platform with an arched mid-portion for
6457992 Visual feedback system for electronic device October 1, 2002
A visual feedback system for providing information to a user regarding aspects such as the status and operation of the systems and components of one or more electronic devices. The visual feedback system is preferably employed in the context of a PC card and includes one or more light
6457949 Fan tray apparatus and method October 1, 2002
A fan tray apparatus and method includes a mounting body portion having a length and a width. The mounting body portion further includes first and second longitudinal sides and first and second lateral sides. A plurality of fans is operatively attached to the mounting body portion. The
6457137 Method for configuring clock ratios in a microprocessor September 24, 2002
Disclosed is a method and apparatus for software configuration of a processor clock ratio. Boot code that the processor executes in response to a reset event correctly configures the clock ratio to a desired value, where the desired value can be set via a user interface. The processor
6457055 Configuring ethernet devices September 24, 2002
An improved method and device for connecting Ethernet network devices at desired settings, including speed and duplex mode. The connected devices include a local device and a link partner device. At least the local device will include auto-negotiation and parallel detection capabilities,
6456665 Partial modification of a nominal impedance using digital impedance synthesis September 24, 2002
A circuit is provided for creating a termination impedance which matches a characteristic impedance. The characteristic impedance of a system or network is matched by placing a nominal impedance across the transmission line. The difference between the nominal impedance and the characteri
6456600 Complex node representation in an asynchronous transfer mode PNNI network September 24, 2002
A method of calculating a complex node representation for logical nodes in a hierarchical peer group in a PNNI based ATM network. The summary information for default spokes, exceptions and bypasses is determined in a way that closely represents the underlying metrics associated with the
6456504 Surface mounted grounding clip for shielded enclosures September 24, 2002
A contact system is disclosed that includes a metal contact clip capable of being surface-mounted to a printed circuit board that facilitates the electrical coupling of the opposing conductive covers in a circuit card assembly having conductive enclosures with a reference potential, such
6456496 Type III pccard system with full wall modular extendable RJ45/11 connector September 24, 2002
An interlocking computer card device having computer module dimensions such as a PCMCIA type III architecture comprising two PCMCIA type II computer card devices. Each computer card device has a full wall extendable media connector and a substantially identical computer card housing. The
6454611 Surface mountable electrical connector system September 24, 2002
A connector platform includes a base having a first end and opposing second end. A retention wall upwardly projects from the first end of the base and has a plurality of slots longitudinally extending therein. A plurality of resiliently flexible conducting wires each have a first end pro
6453024 Graphical software for reconfiguring modems having an electrically adaptable telephone line inte September 17, 2002
Methods and systems for configuring communication systems to access public telephone networks. communication systems, such as modems, that connect to public telephone networks are required to meet certain access requirements defined by the telephone network. The present invention provide
6452938 System and method to reduce electromagnetic interference emissions in a network interface September 17, 2002
A system for reducing electromagnetic interference emissions is described. The system can include a network interface card with an Ethernet controller circuit. The Ethernet controller circuit generates an Ethernet output signal that includes a pre-emphasis component and a data component.
6449348 Power transfer apparatus for use by network devices including telephone equipment September 10, 2002
One embodiment of the invention includes an apparatus for providing electric power to a telephone across a transmission line where the telephone is coupled to a network device. A power and data coupler ("the coupler") is coupled to one end of the transmission line. The transmission l
6449291 Method and apparatus for time synchronization in a communication system September 10, 2002
A method and apparatus for time synchronization in a communications system such as a system including cable modems is provided. The synchronization method comprises the steps of receiving a first timestamp from a headend unit with the cable modem, and generating a first cable modem time
6448672 Intelligent power supply control for electronic systems requiring multiple voltages September 10, 2002
A system and method for developing a cost efficient electronic power supply system that handles a range of supported electronic circuits is provided. The electronic power supply system adaptively configures the power applied to electronic circuits. Thereby, eliminating redesign of a powe
6447306 PC card configuration September 10, 2002
A combination PC card for use in facilitating communication between a host computer and a remote device. The combination PC card includes two RJ-type connectors, an RJ-11 connector and an RJ-45 connector, centered at a front edge of the combination PC card. The connector bodies are integ
6446127 System and method for providing user mobility services on a telephony network September 3, 2002
A system and method for providing user mobility services on a data network telephony system. User attributes may be transmitted from a portable information device, such as a personal digital assistant, to a voice communication device, such as an Ethernet-based telephone. The voice co
6445680 Linked list based least recently used arbiter September 3, 2002
An arbiter utilizing a link list to arbitrate access between multiple data sources and a single destination. The arbiter is of the least recently used type whereby the data source that has not sent data for the longest time is given the highest priority. The arbiter provides an arbitrati
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