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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
6396832 Method and apparatus for optimizing a switched arbitrated loop for maximum access fairness May 28, 2002
In a fiber channel network environment wherein an autonomous hub is provided with a switchable connection to another autonomous hub, an autonomous hub being an arbitrated loop with at least one port, a method is provided for maintaining switchable access between the autonomous hubs w
6396169 Intelligent power supply control for electronic systems requiring multiple voltages May 28, 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
6395976 Apparatus and method for aligning a circuit board assembly in an electronic chassis May 28, 2002
An apparatus for aligning a bracket member of a circuit board assembly as the bracket member is positioned against and secured to an electronic chassis is provided. A circuit board assembly includes a circuit board operatively attached to a bracket member. The bracket member includes a
6394813 Rotating connector adaptor May 28, 2002
A connector adapter that can be used to directly connect a peripheral device to a host device. The connector adapter is adjustable so as to allow selective reorientation of the peripheral with respect to the host device. The connector adapter includes a limiting mechanism that restricts
6393570 Low-power apparatus for power management enabling May 21, 2002
Low power event monitoring enabling logic allows wake up devices to maintain their proper functionality in the event of a momentary power loss, or in the event the operating system does not properly load upon power-up. The technology is particularly suited for use with network interf
6393488 System and method for supporting internet protocol subnets with network address translators May 21, 2002
A method and system for resolving network address translator (NAT) based internet protocol (IP) subnet address conflicts. In one embodiment of the present invention, a first NAT is used to assign an address to a first device which is coupled to the first NAT. Next, the present embodiment
6393474 Dynamic policy management apparatus and method using active network devices May 21, 2002
A system for providing policy management in a network that includes nodes operating in multiple protocol layers and having enforcement functions. Multiple network devices, such as routers, remote access equipment, switches, repeaters and network cards, and end system processes having
6393110 Methods and apparatus for terminating a line and supporting the asymmetric digital subscriber li May 21, 2002
A digital access arrangement for (i) isolating downstream components from twisted pair copper wire and (ii) separating upstream and downstream communications channels. The line isolation is performed with relatively small, lightweight components, such as an optical isolation unit for
6389115 System and method for notifying a user of voice mail messages at a cell phone site May 14, 2002
System and method for providing a waiting indicator at a cell phone indicating that a voice mail message is available at a remote voice mail system. The system is placed at a voice mail system site and interacts with the voice mail system using industry standard signals, such as TAP
6389090 Digital clock/data signal recovery method and apparatus May 14, 2002
For a digital communications receiver, a clock and data signal recovery circuit and method use an all digital delay locked loop timed by an on-chip transmit clock signal. The digital delay locked loop includes a phase detector and loop filter. The phase detector determines, for each
6388884 Apparatus and method of activating a switch with a circuit board ejector May 14, 2002
An apparatus and method for activating a switch with a circuit board ejector includes a circuit board and a switch assembly including the switch for transitioning the circuit board from a first mode to a second mode and vice versa. The switch assembly is attached to the circuit board,
6386922 Low profile connector with extending latch mechanism May 14, 2002
An extendable media connector for coupling a physical/electrical media plug to an electrical apparatus either directly or indirectly via a communications device. The extendable media connector is slidably retractable and has a frame with an aperture extending therethrough and a rocke
6385672 System to optimize packet buffer utilization via selectively partitioned transmit and receive bu May 7, 2002
The present invention provides a device which facilitates communications between a computer system and a data network by buffering data in transit between the computer system and the data network in a single buffer memory which can be flexibly partitioned into separate transmit and recei
6385669 Method and apparatus for the detection of the presence of a device on a high speed digital data May 7, 2002
An interface comprises a management entity including a first state machine, a bidirectional serial data bus and a clock line, intended for connection to physical layer devices each of which includes at least one register into which data can be written by way of the serial data bus and at
6385307 Apparatus and method for overriding an automatic answer function of a telephone answering device May 7, 2002
An apparatus for overriding an automatic answer function of a telephone answering device includes a host computer in communication with the telephone answering device. The host computer includes an application running on the host computer, and the telephone answering device includes
6381661 High throughput UART to DSP interface having Dual transmit and receive FIFO buffers to support d April 30, 2002
The high throughput UART to DSP interface (UDIF) maintains UART functionality while integrating dual Transmit (Tx) and Receive (Rx) FIFO buffers that are optimized for more efficient interaction with their respective I/O processors. The portion of the interface design interacting wit
6381638 System and method for options based address reuse April 30, 2002
A system and method for an Options Based Address Reuse ("OBAR") is provided. The system includes a first network having a host device with a host address and a host port, and a second network external to the first network and having a server device. The also comprises a combination n
6380899 Case with communication module having a passive radiator for a handheld computer system April 30, 2002
A case for a handheld computer system is described. In an embodiment, the handheld computer system comprises a personal digital assistant. The case has multi-functional capability. The case provides a protective housing for the personal digital assistant and includes a communication modu
6378011 Parallel to serial asynchronous hardware assisted DSP interface April 23, 2002
Parallel data is serialized and transmitted and asynchronous data is received and placed into parallel bytes using a hardware assisted interface. The interface can be driven with very little overhead to the DSP. Additional timing registers and enhanced data buffers decrease the neces
6377683 Low complexity frequency domain echo canceller for DMT transceivers April 23, 2002
A low-complexity frequency domain echo canceller for use in a full-duplex DMT transceiver. The transceiver includes a modulator that utilizes DMT modulation methods for communication over the transmission medium, a demodulator for receiving DMT signals, and a frequency domain echo ca
6377667 Telephone line-assist powered apparatus with programmable hold current April 23, 2002
A power management circuit for use in a terminal interface device such as a modem which converts available power from a terminal or host device such as a computer into usable standby power for use when the terminal interface device is non-operational. The power management circuit is
6377571 Virtual modem for dialout clients in virtual private network April 23, 2002
The present invention provides method and apparatus to provide local clients with the capability to dial-out through a packet processor to a remote line server to access a remote client. A packet processor is disclosed which includes a first and second interface and a bridge/router.
6377218 Device for providing an antenna, a receptacle, and a physical connector on a type II PCMCIA card April 23, 2002
A peripheral component providing multiple types of interfaces. In one embodiment, the peripheral component comprises a housing with logical circuitry within. A receptacle is electrically connected to the logical circuitry. The receptacle may be operable to receive an RJ-11 plug and/or
6375479 Retractable connector with an alignment mechanism for use with electronic devices April 23, 2002
The present invention provides a retractable connector with a guide structure for use with electronic devices. The guide structure minimizes the lateral movement of the retractable connector and helps ensure that the retractable connector moves smoothly between the extended and retra
6375472 Apparatus and method of mounting a bracket apparatus to a circuit board April 23, 2002
A bracket mounting apparatus includes a bracket body, at least one bracket arm and a rivet-head integrally formed in and extending from the bracket arm to allow the bracket mounting apparatus to be secured to a printed circuit board.
6373889 In-Band signal and detector for PCM modem exception processing April 16, 2002
A signal for exception processing is provided. The signal includes a first sequence of PCM codewords. Each PCM codeword in the sequence has a magnitude corresponding to a maximum point within an active constellation. The signal further includes a timing mark following the first sequence.
6373721 Cable management apparatus and method April 16, 2002
A cable management apparatus includes a bracket member and a cable guide member fastened to the bracket member. The bracket member includes a stem portion and a body portion for fastening to a cabinet for housing a plurality of electronic modules. The cable guide member includes a flange
6373305 Digital receive phase lock loop with residual phase error and cumulative phase error correction April 16, 2002
A digital PLL's stability and immunity to jitter are improved by deriving the correction to the state machine count from an average over several computations of the phase error, and re-initializing the computation of the phase error to the residual error remaining after the correction. T
6370147 Method for addressing of passive network hosts in a data-over-cable system April 9, 2002
A method is provided to address passive network devices in a data-over-cable system. A "passive" network device, such as a printer, facsimile machine, computer other network device, is a device that is assigned a network address by the data-over-cable system and does not have a Dynam
6370132 Mobile terminated call routing in a network access server/interworking function April 9, 2002
Mobile terminated calls arriving at a network access server configured as an Interworking function (IWF) are routed to a particular modem in the network access server by means of a table maintained at the interface to a communications network receiving the call. The table maps called par
6368064 Apparatus and method of providing redundant power and redundant fan speed control to a plurality April 9, 2002
An apparatus and method for providing redundant power and redundant fan speed control to a plurality of fans is provided. A first power supply input is electrically connected to a second power supply input to provide a combined power supply input. First and second fan speed controllers e
6367018 Method for detecting dedicated link between an end station and a network device April 2, 2002
A dedicated link between the intermediate system or other network device and the end system is detected prior to exchanging the authentication/identification information of the user, thereby ensuring that the information is seen only by the network device and the end system and by no
6366973 Slave interface circuit for providing communication between a peripheral component interconnect April 2, 2002
A slave interface circuit for providing communication between a PCI (Peripheral Component Interconnect) bus domain and an ASB (Advanced System Bus) bus domain. The novel circuit is an integrated interface for communicating using the AMBA (Advanced Microcontroller Bus Architecture) AS
6366959 Method and apparatus for real time communication system buffer size and error correction coding April 2, 2002
A method and apparatus for communication system buffer size and error correction coding selection. A method includes the steps of receiving a stream of data packets by a real time receiver that includes a buffer management device, a first plurality of jitter buffers, and a second plu
6366589 Multiple parallel asymmetric interfaces with reversed asymmetric links April 2, 2002
A method and apparatus for communicating packet fragments over a symmetrical interface with reversed asymmetrical links. The method comprises the steps of coupling a first asymmetric interface to a computing device. The first interface has an up-link transmission rate greater than it
6366297 System and method for displaying modem information on a graphical user interface display April 2, 2002
A system and method for displaying information from a device on a display screen using application screens generated by a graphical user interface. Device commands that request information about the device are received by the device driver that provides an interface to the device. The de
6366261 Method and apparatus for overmolded antenna April 2, 2002
A generally planer antenna structure for connecting to a transceiver is provided with the antenna structure having a printed circuit board including a radiating element etched or fabricated thereon. The printed circuit board and radiating element are thereafter encapsulated within an
6364009 Cooling devices April 2, 2002
A cooling apparatus for cooling an electrical device 1 using a flow of coolant comprises a cooling unit 3. The cooling unit 3 is in contact with the device 1 and includes a channel 6 for transporting the coolant past the device 1. In a preferred embodiment, the sectional area of the chan
6363477 Method for analyzing network application flows in an encrypted environment March 26, 2002
In a communication network having computer systems communicatively coupled to each other with communication equipment, where the computer systems are executing network applications that send and receive either encrypted or unencrypted data packets over the communication network, a method
6363444 Slave processor to slave memory data transfer with master processor writing address to slave mem March 26, 2002
A master processor, such as a processor embedded in a network interface card, is coupled to a memory via a memory data bus. The master processor generates addresses for the memory and controls the reading and writing of the memory at addressed locations. A slave processor, such as an opt
6363429 Method and system for automatic determination of priority data streams on computer networks March 26, 2002
A method and system for automatically determining priority data streams on a computer network. A data traffic signature is calculated for a data stream using one or more of an average packet spacing, average packet size, average packet jitter or variation in packet size parameters ca
6363423 System and method for remotely generating, assigning and updating network adapter card in a comp March 26, 2002
A system and method for retrieving and assigning a unique media access control (MAC) address to a network adapter card in a computer system that uses the network adapter card to connect to a data network. The computer system includes a communications application for invoking a network
6363416 System and method for automatic election of a representative node within a communications networ March 26, 2002
A system and method for automatic election a representative node within a communication network with built-in redundancy. In a communication network where data is distributed from a central location to multiple nodes, the present invention enables one of the nodes to be automatically ide
6363053 Method and apparatus for measurement-based conformance testing of service level agreements in ne March 26, 2002
A method and apparatus for measurement-based conformance testing of service level agreements in networks. The method includes first collecting quality of service information from network traffic over a plurality of network nodes. Then, the collected quality of service information is comp
6361357 Remotely illuminated electronic connector for improving viewing of status indicators March 26, 2002
This is a system and method by which the light from a light source on a selectively attached portable expansion device, such as a PCMCIA card, is more visible to a user. It is accomplished by using a light transfer medium, such as transparent plastic, in the plug of a media cable. The
6360281 System and method for communicating with a serial communications device using multiple virtual p March 19, 2002
A system and method for communicating with a serial communications device using multiple virtual ports. The multiple virtual ports are mapped to device names using a port router. The virtual ports are accessed to provide a communications port, or to provide a command/status port for
6360278 FIFO queued entry point circuit for a network interface card March 19, 2002
A first-in-first-out (FIFO) entry point circuit for a network interface card. The novel circuit of the present invention provides a FIFO entry point circuit within a network interface card (NIC). The FIFO implementation allows multiple downlist pointers to be maintained within the tr
6360271 System for dynamic jitter buffer management based on synchronized clocks March 19, 2002
A system for dynamically jitter buffering a sequence of packets based on substantially synchronized time signals maintained at the transmitting and receiving ends of a communication system. The time signals may be synchronized, for instance, by equipping both the transmitting and rec
6360258 Network management software library allowing a sending and retrieval of multiple SNMP objects March 19, 2002
A method is provided for providing multiple variable retrievals and setting within one SnmpRequest. The method forms packet data units with object identifiers (OIDs). The OIDs are packet specific for a particular request in an object management system using SNMP (simple network managemen
6359998 Method and apparatus for wavelet-based digital watermarking March 19, 2002
The disclosed watermarking method utilizes a transform technique for inserting an imperceptible digital watermark into digital data that is strongly resistant to unauthorized detection and decoding. Methods for embedding a watermark that is sufficiently robust to lossy compression and
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