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




Patent Number Title Of Patent Date Issued
6222910 System and method for connecting and interfacing a communications device to a telephone line via April 24, 2001
The present invention is directed to a novel system and method for connecting and interfacing a communications device, such as a modem, to a two-wire telephone line via a telephone base set, thereby allowing for data or voice communications on the telephone line. The modem and the te
6222876 Detecting valid data patterns for adapting equalization gain and offset for data transmissions April 24, 2001
A method for tuning an adaptive equalizer in order to receive digital signals from a transmission medium both coarse and fine tuning methods to adaptively equalize a signal received from the transmission medium. The coarse tuning method adjusts an equalizer such that the post equalized
6222851 Adaptive tree-based contention resolution media access control protocol April 24, 2001
An adaptive tree-based contention resolution media access control protocol for a local area network using orthogonal frequency division multiplexing. The invention uses constant tones in frequency bins to resolve contention between multiple transmitting nodes. All nodes are synchronized
6222820 Method of VCC/VPC redundancy for asynchronous transfer mode networks April 24, 2001
A method of selectively providing redundancy on a dynamic basis to end users that request it. The method establishes both a primary and a redundant connection for each connection requested to be redundant. The redundancy method of the present invention has application to PNNI network
6219815 High-speed syndrome calculation April 17, 2001
A method and device for calculating syndromes used in forward-error-correction codes. To calculate syndromes more quickly using a computer with memory access latency, the polynomial equation C(X) is divided by a generator polynomial G(X) to form a remainder polynomial R(X). The remai
6219732 Apparatus and method for wireless communication between a host and a selectively removable modul April 17, 2001
A selectively removable module, such as a PCMCIA card, inserted into a host computer system, such as a notebook computer, is provided that has a electrical interface between the module circuitry and the host computer circuitry, A wireless data channel is implemented between the module
6219697 Method and apparatus for operating the internet protocol over a high-speed serial bus April 17, 2001
A method and apparatus of integrating the IEEE 1394 protocol with the IP protocol in which the IEEE 1394 high speed serial bus operates as the physical and link layer medium and the IP operates as the transport layer. There are differences in the protocols which require special considera
6217352 Electrical connectors having dual biased contact pins April 17, 2001
An electrical coupling system includes a printed circuit board (PCB) that is selectively fixed to an electrical apparatus. The PCB has an elongated finger with a plurality of partially exposed contact lines formed thereon. A jack includes a slide plate having an aperture extending theret
6217351 Adaptor module configured to be attached to a communication card April 17, 2001
An adaptor module allows an electrical connection to be established between a communication system and a communication card. Advantageously, the adaptor module can be configured to provide an interface between the communication card and various communication systems such as conventional
6217350 Media jack adaptor and system April 17, 2001
A system for housing and receiving a media jack includes (i) an adaptor having an adaptor body having a track for receiving a media jack; and a wing extending from one side of the adaptor body; and (ii) first and second shells. Each shell includes a plate and a rail mounted on the pl
6216339 Tool-actuated ejector mechanism for extracting electronic modular components April 17, 2001
A tool-actuated ejector for extracting electronic modular components. The ejector, which functions as a levered cam, has a body with a first end, a second end and a pivot located intermediate the first and second ends. A tool-receiving socket mounts at the second end. A tool, such as a
6216170 Methods and apparatus for interconnecting personal computers (PCs) and local area networks (LANs April 10, 2001
Methods and apparatus for providing virtual local connection of one PC to another PC, a PC to a LAN and from one LAN to another LAN, over a synchronous digital wide area network (effectively enabling a LAN to be extended through a synchronous digital wide area network on a virtual ba
6216158 System and method using a palm sized computer to control network devices April 10, 2001
Controlling network services using palm sized computers is described. A program on the palm sized computer is used to access a registry of network services that may be available. The registry includes descriptions for various services. Each description includes at least a reference to
6215799 Analog telephone to ISDN interface apparatus and method therefor April 10, 2001
A method and portable ISDN interface module for interfacing both a computer or digital device having a framed data format such as HDLC with an analog telephone over integrated partitioned ISDN channels is provided. The portable ISDN interface module comprises an analog telephone interfac
6212563 Method and system for setting and managing externally provided internet protocol addresses using April 3, 2001
A system and method for allocating IP addresses for network devices using the dynamic host configuration protocol (DHCP) wherein the DHCP server returns the requested IP address every time the IP address is requested. A client identifier is generated for each network device as a function
6212272 Subscriber line interface circuit (SLIC) simulator April 3, 2001
An analog subscriber unit adapter/interface which generates a low voltage ring-tone signal to an audio speaker is provided The adapter facilitates the use of an analog subscriber unit over an ISDN communications link and provides added functionality to ISDN devices. The SLIC simulator in
6212207 Robbed bit signal detection and compensation April 3, 2001
Detection and compensation for periodic disturbances in sampled data such as the error introduced by robbed bit signaling (RBS) in a digital carrier system. A period of N samples, e.g., six or twelve frames, at which the periodic disturbance repeats is identified for collecting a subset
6212206 Methods and computer executable instructions for improving communications in a packet switching April 3, 2001
Software and methods are provided for improving contemporary communications between two or more terminal locations of a packet switched network. In a packet switched network incoming packets are stored in buffers until, as in a video conference, playback of the packets occurs. As describ
6212195 Telecommunication apparatus and method for forwarding packets using separate collision domains April 3, 2001
A telecommunication apparatus and method for providing packets to at least one of a first and a second network are described. A telephone set connects the first network to the second network. In one embodiment, the telephone set includes two MAC devices. Each MAC device is in electrical
6212188 Method of source routing in an asynchronous transfer mode network when a node is in an overload April 3, 2001
A method of performing source routing when a node is in the overload state. A node in the overload state cannot perform routing functions in response to a SETUP message for destinations other than its directly connected neighbors. Instead, the node forwards the SETUP request to one of it
6212165 Apparatus for and method of allocating a shared resource among multiple ports April 3, 2001
An apparatus for and a method of collapsing multiple ports to a single queue. The invention has applications in switching devices whereby several external ports share the same resource, such as a switching fabric. In order to allocate the resources fairly to all the ports, a scanning met
6208716 Telephone answering apparatus and method for determining the time of message reception March 27, 2001
A telephone answering apparatus for determining the time of message reception includes a host computer having a host clock operatively connected to an application running on the host computer. A telephone answering device includes a controller operatively connected to a device clock,
6208714 Telephone answering apparatus for indicating the presence of a power cycle March 27, 2001
A telephone answering apparatus for indicating the presence of a power-cycle includes a memory device which stores a retrieved message and a value from a clock, and a controller operatively connected to the memory device and to the clock. The controller initializes the value of the clock
6208629 Method and apparatus for assigning spectrum of a local area network March 27, 2001
One embodiment of the invention includes assigning channels to a set of access points coupled to a network. The network includes a set of wireless network nodes. Each access point communicates, using one of the channels, to a subset of the wireless network nodes. Each channel corresponds
6208623 Method of combining PNNI and E-IISP in an asynchronous transfer mode network March 27, 2001
A method of permitting older networks based on E-IISP routing to operate in newer PNNI based networks. The invention combines the PNNI and E-IISP routing schemes and permits their simultaneous execution in the same ATM network. The E-IISP routing scheme is modified so as to operate in un
6208616 System for detecting errors in a network March 27, 2001
A system is described for providing fault tolerance within a computer system. The system provides a method for allowing multiple network interface cards to reside within the same computer system. If the primary network interface card fails, a secondary network interface card automati
6206267 Full coverage thermal couple March 27, 2001
A process for profiling solder joints of circuit boards including solder bumps is provided using an arrangement with a thin tape element with length and width dimensions generally corresponding to the length and width dimensions of the ball grid array (BGA) and with a registration po
6205509 Method for improving interrupt response time March 20, 2001
A method and apparatus for rapidly detecting the source of an interrupt. A multi-bit interrupt state register is provided which registers the occurrence of an interrupt in response to an interrupt event. The outputs of the interrupt state register are coupled to an interrupt vector r
6205448 Method and apparatus of synchronizing two computer systems supporting multiple synchronization t March 20, 2001
A method and system of synchronizing two computer systems supporting multiple synchronization techniques is described. In one example system, a portable computer system is loaded with synchronization transport modules. An application on the portable computer system is executed causing th
6205150 Method of scheduling higher and lower priority data packets March 20, 2001
A method for scheduling lower priority and higher priority data packets in a network system is provided. The method allows a network device to schedule the order in which data packets are sent and received on a network system using dual queues. As the network device receives data pac
6205149 Quality of service control mechanism and apparatus March 20, 2001
Quality of Service ("QoS") variables for predetermined protocol Type data units are stored in a cache memory. For data units that are associated with a flow, thirteen bytes selected out of the Internet Protocol ("IP") header are employed as at least a portion of a key to perform a cache
6205146 Method of dynamically routing to a well known address in a network March 20, 2001
A method of determining an efficient route to a well known address that is particularly applicable to networks that do not have the capability of source routing for calculating routes to specific addresses such as ATM networks based on the IISP protocol. The well known address may repres
6205030 External fuse access for PC card March 20, 2001
A PC card includes a housing bounding a compartment. The housing includes a top cover plate, a bottom cover plate, and a border frame extending therebetween. A circuit board having electrical circuitry formed thereon is disposed within the compartment of the housing. An electrical connec
6202081 Method and protocol for synchronized transfer-window based firewall traversal March 13, 2001
A protocol and method for synchronized transfer-window based firewall traversal is provided. The firewall traversal protocol includes messages for securely opening and closing a virtual data transfer-window through a firewall. The method allows a first network device inside a firewall to
6201817 Memory based buffering for a UART or a parallel UART like interface March 13, 2001
A system linking a serial interface with a processor that is parallel in nature is described. A system memory having a receive buffer stores data from a UART destined for processing by a central processing unit. A control state machine interrupts the central processing unit to initiate
6201809 Port redundancy and backpressure translation table apparatus March 13, 2001
A translation table apparatus used to perform both forward and backward bitmap vector translations. The translation table is used with bit vectors where it is desired to displace one or more bits to different bit positions in accordance with a configurable bitmap translation table. The
6201792 Backpressure responsive multicast queue March 13, 2001
A multicast queue for controlling cell traffic to individual output queues in a multicast group in accordance with the backpressure information generated by each output queue. One or more destinations asserting the backpressure signal are identified and, in response, the corresponding on
6201374 Voltage regulation and power switching system March 13, 2001
A power switching and voltage regulation system utilizing a conventional switching element to provide distributed power switching and voltage regulation. The system utilizes a switching element to impose an impedance in a controlled manner to provide power to a load such as a plug-in mod
6198632 Slim media jack March 6, 2001
The present invention is designed to have half the thickness of physical/electrical media connectors such as the RJ-11 and the RJ-45 jacks. One embodiment of the present invention is an RJ-11 or an RJ-45 jack with a reduced thickness. The thickness of the present invention permits mo
6195589 Personal data assistant with remote control capabilities February 27, 2001
An adapter having a housing is configured for removable attachment to a conventional PDA. The adapter is electrically coupled with the PDA and includes a light source configured to selectively emanate a light beam that can be modified into a digital signal. The digital signal can be
6195351 Logical switch set February 27, 2001
A Logical Switch Set (LSS) is provided comprising two or more switches that act as a single packet forwarding device with specific connection rules. The single packet forwarding device is a single logical unit. The LSS may be used as either a redundant switch set (RSS) or as a Load Shari
6195349 Scalable logical LAN February 27, 2001
A packet based high speed mesh forms a trunk cluster. The trunk cluster is constructed with a set of loosely coupled switches, a configuration protocol, trunked network interfaces, and optionally a reachablilty protocol. The trunk cluster provides a Logical LAN service. Each switch in
6195332 Rate-based flow control protocol on an ethernet-over-ring communications network February 27, 2001
A method for rate-based flow control protocol on a ring topology network utilizing ethernet packet format and ethernet equipment. The method operates on a communication network communicatively coupling a plurality of network nodes each representing a local area network (LAN). The method
6193287 Electronic chassis door locking apparatus February 27, 2001
An electronic chassis door locking apparatus includes an electronic chassis door and a locking assembly. The electronic chassis door includes a recessed region formed therein. The recessed region is positioned adjacent a latch. The latch is operably attached to the electronic chassis doo
6192440 System and method for dynamically selecting interrupt storage time threshold parameters February 20, 2001
A system and method for dynamically calculating the maximum amount of time a peripheral component event can be stored before generating a corresponding interrupt. Specifically, in this embodiment, the host computer is adapted to have a peripheral component removably coupled thereto a
6192071 Detecting overequalization for adapting equalization and offset for data transmissions February 20, 2001
A method for tuning an adaptive equalizer in order to receive digital signals from a transmission medium both coarse and fine tuning methods to adaptively equalize a signal received from the transmission medium. The coarse tuning method adjusts an equalizer such that the post equalized
6192043 Method of caching routes in asynchronous transfer mode PNNI networks February 20, 2001
A caching method to greatly reduce the time to calculate routes based on the well known Dijkstra routing algorithm. A first embodiment is suitable for use in applications where only a single class of call is in use. A second embodiment is suitable for use where multiple classes of calls
6190188 Circuit board ejector having a manually operable portion February 20, 2001
A circuit board ejector includes a handle portion and a hook portion, the handle portion including a manually operable portion. The manually operable portion includes a plurality of ridge portions and a raised lip portion to allow a user to apply a load to the manually operable portion
6189102 Method for authentication of network devices in a data-over cable system February 13, 2001
A method for authentication of network devices in a data-over-cable system is provided. The method includes storing a network address for customer premise equipment and a network address for a cable modem associated with the customer premise equipment in an internal table on a cable mode
6189067 System and method for dynamically selecting interrupt quantity threshold parameters February 13, 2001
A system and method for dynamically calculating the quantity of peripheral component events to coalesce. In one embodiment, a host computer is adapted to have a peripheral component removably coupled thereto. The host computer is further adapted to operate a peripheral component driver.

 
 
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