| Patent Number |
Title Of Patent |
Date Issued |
| 6782066 |
Method and system for detecting frame slips in a digital communications channel |
August 24, 2004 |
| A method and system for detecting frame slips due to loss of synchronization in a digital communication channel is described. In an illustrative embodiment, a synchronization bit pattern is periodically embedded in the digital data stream. In a described embodiment, the sign bits of |
| 6781982 |
Method and system for allocating persistent private network addresses between private networks |
August 24, 2004 |
| A method and system for allocating persistent private network addresses between private networks. An Internet Protocol ("IP") address of a multimedia device (e.g., a Voice-over-IP ("VoIP") device) is publicly available and the device, the device's location or the device's user may be |
| 6779056 |
Direct data placement and message reassembly |
August 17, 2004 |
| A direct data placement implementation for a data reassembly process. Data within a protocol data unit is placed directly in preassigned application buffers. The network interface card has buffer space into which message headers, segment headers and indicators of escaped data and size of |
| 6779047 |
Serial communication port arbitration between a hotsync manager and a wireless connection manage |
August 17, 2004 |
| Within one embodiment of the present invention, arbitration software operating on a computer is able to determine whether communication software utilizes the same serial communication (COM) port of the computer as a HotSync Manager. If they do use the same serial COM port, the present |
| 6778664 |
Line current protection circuit and method for linear and nonlinear hold circuit |
August 17, 2004 |
| A novel line-current protection circuit for detecting excessive line current from a telephone line and protecting line interface circuitry from the excessive line current is presented. The protection circuit is adapted to detect when an excessive current is present on the tip and ring li |
| 6778519 |
Wireless multiple function PC card |
August 17, 2004 |
| A computing environment in which a plurality of portable computers use a spread spectrum communications link to wirelessly communicate with and receive input from a plurality of peripheral devices. In a preferred embodiment, one or more portable or laptop computers each have a PCMCIA |
| 6775301 |
System and method for compensating for channel jitter |
August 10, 2004 |
| A system and method for receiving a transported stream of data packets at a network includes stripping the headers off the data packets at a de-packetizer, buffering the data packets at a jitter buffer and shifting the play-out of the data packets from the jitter buffer to a decoder by a |
| 6775276 |
Method and system for seamless address allocation in a data-over-cable system |
August 10, 2004 |
| A method and system is provided to send and receive Dynamic Host Configuration Protocol ("DHCP") messages in a data-over-cable system via a route with one or more routers. The routers may apply one or more different protocol filters to DHCP messages, such as filtering out DHCP messag |
| 6775268 |
Method and system for mapping packet service categories to asymmetric digital subscriber line la |
August 10, 2004 |
| A method and system for packet service category requests to asymmetric digital subscriber line ("ADSL") latency paths. A data packet request from a customer premise distribution network with a desired service category (e.g., quality-of-service) and a desired latency is mapped to an ADSL |
| 6775243 |
Graphically distinguishing a path between two points on a network |
August 10, 2004 |
| In a computer network, a method to graphically distinguish on a network map a path between two points on a network. This is particularly useful in diagnosing problems, by tracing a path between two devices. While path tracing may be a relatively simple matter where there are relatively f |
| 6772349 |
Detection of an attack such as a pre-attack on a computer network |
August 3, 2004 |
| A computer program detects a potential attack on a computer network. A list E is made from network traffic data including source and destination addresses of traffic on the network. The list E includes all source addresses in the data which are not allocated to the network and are not |
| 6772123 |
Method and system for performing speech recognition for an internet appliance using a remotely l |
August 3, 2004 |
| A method and system for performing speech recognition for an internet appliance using a remotely located speech recognition application. The invention includes an internet appliance that is connected through a network with either a stand-alone computer or a server computer located at |
| 6771745 |
Method and apparatus for telephone dialling using a network device |
August 3, 2004 |
| A voicemail processing system and method for use in a communications system for returning a telephone call in response to a voicemail message is disclosed. The processing system comprises a processor for receiving caller identifying information relating to a voicemail message. The pr |
| 6771674 |
Method and system for forward error correction based on parallel streams |
August 3, 2004 |
| A mechanism for forward error correction (FEC) coding, suitable for use where multiple payload streams are simultaneously transmitted from end-to-end. Instead of deriving parity information based on payload information carried within a given stream, the invention involves FEC encodin |
| 6771610 |
Spanning tree with protocol for bypassing port state transition timers |
August 3, 2004 |
| Mechanisms for use on designated ports in spanning tree protocol entities allow such ports to transition to a forwarding state on the basis of actual communication delays between neighboring bridges, rather than upon expiration of forwarding delay timers. The logic that manages transitio |
| 6771288 |
Methods and apparatus for updating information in a display containing fixed and variable inform |
August 3, 2004 |
| A computer manages a remote device via a remote monitoring system and a network. The computer employs a mimic that periodically displays status information transmitted from the monitoring system. Initially, the monitoring system transmits data that gives a complete description of the |
| 6771287 |
Graphically distinguishing a path between two points on a network |
August 3, 2004 |
| Network supervising apparatus for graphically distinguishing a path between two points on a network, and a method therefor, and computer program for carrying out the method, comprising: a memory (21), in use, storing information relating to the components (12, 13, 14) of the network a |
| 6768796 |
System and method for echo cancellation |
July 27, 2004 |
| Methods and systems for echo cancellation are provided. According to one method, when a far end signal with an echo having a major body and a pure delay portion is received, a filter having a finite length is provided. Once the finite length filter covers a portion of an echo path, the m |
| 6768743 |
Method and system for address server redirection for multiple address networks |
July 27, 2004 |
| A method and system for address server redirection for multiple address networks. A primary network address and an address of a secondary network address server are requested by a network device from a primary network address server. The address of the secondary network address server is |
| 6766453 |
Authenticated diffie-hellman key agreement protocol where the communicating parties share a secr |
July 20, 2004 |
| The present invention provides a method and system for performing an authenticated Diffie-Hellman key agreement protocol over a network where the communicating parties share a secret key with a third party. In one embodiment, the network is a wireless network, wherein a wireless client |
| 6766377 |
Media gateway proxy |
July 20, 2004 |
| A Media Gateway proxy receives a message and parses the message. The message contains an attribute, sub-command, and a destination address. The proxy stores the message and the attributes. Each of the attributes corresponds to a selected one of a plurality of Media Gateways. Each of |
| 6766367 |
Method and apparatus for fetching sparsely indexed MIB tables in managed network systems |
July 20, 2004 |
| A method for fetching sparsely indexed MIB tables for a managed network device using an approximation operation, such as a GetNext SNMP operation, comprises sending a plurality of operations in a first data packet at least one of the plurality of approximation operations specifying a |
| 6766020 |
System and method for comfort noise generation |
July 20, 2004 |
| A system for creating a comfort noise signal, said system includes a clipping circuit, a comfort noise generator, and a switch. The clipping circuit receives a near-end signal, a far-end signal and a residual signal. The clipping circuit determines the power of the far-end signal, th |
| 6765989 |
Method for optimizing downstream data transfer in an asymmetric digital subscriber line modem |
July 20, 2004 |
| A method for optimizing downstream data transfer in a telephone from a splitterless asymmetric digital subscriber line modem. The modem examines the power spectrum of fast retrain signals both when the telephone is on-hook and off-hook. By comparing the power in the spectra, the modem ma |
| 6765914 |
Generic switch architecture to support flexible subnets across layer-3 devices |
July 20, 2004 |
| The present invention is drawn to an system and a method for configuring subnets within a switch network that is typically comprised of switches and a router coupled together via a common shared bus. In one embodiment, a VLAN-defined (virtual local area network-defined) subnet is configu |
| 6763348 |
Method and apparatus for searching databases employing a trie search structure |
July 13, 2004 |
| A trie searching technique employs entries each including a pointer to the next block in the search and a status indication and also including start and end indexes which define a selected section of the trie key identifying an entry within the block identified by the pointer. Thereby |
| 6763061 |
Frequency domain technique for narrowband noise cancellation in DMT receivers |
July 13, 2004 |
| The system and method of the preferred embodiments may be directed to improving the signal-to-noise ratio in frequency spectrum regions where narrowband interference may be present. The system and method of the preferred embodiments includes reducing the narrowband interference by de |
| 6763031 |
Network device incorporating selective compression of stored data packets |
July 13, 2004 |
| A network device incorporating selective compression of stored data packets is disclosed. The network device receives, stores and forwards data packets and includes a system for applying a compression algorithm to packets after their header portions and storing the partially compressed |
| 6763023 |
Network switch with self-learning routing facility |
July 13, 2004 |
| A sub-system for forming part of a packet-data communication system for the transmission of data packets which contain media access control addresses and protocol addresses. The sub-system comprises a multiple-port network switch for forwarding data packets in response to an examination |
| 6763018 |
Distributed protocol processing and packet forwarding using tunneling protocols |
July 13, 2004 |
| A high density network access server implements a tunneling protocol between a modem module and a route server module. PPP and routing control packets received from the PPP link are tunneled to the route server for processing. The IP data packet forwarding function for the network access |
| 6763001 |
Discovering non managed devices in a network such as a LAN using telnet |
July 13, 2004 |
| In a computer network, a method for obtaining information regarding a device in a network, including obtaining said information using Telnet and using said information in the discovery of a network.The method uses a computer program on a computer readable medium loadable into a digital c |
| 6762995 |
Network switch including hysteresis in signalling fullness of transmit queues |
July 13, 2004 |
| A multiport network device includes a multiplicity of receive queues, a multiplicity of transmit queues and a forwarding engine for transferring entries from the receive queues to the transmit queues. When a transmit queue is greater than a first hysteresis point, the forwarding engine |
| 6760804 |
Apparatus and method for providing an interface between legacy applications and a wireless commu |
July 6, 2004 |
| An apparatus and method for interfacing legacy applications with a wireless communication network. Specifically, the present invention discloses an integrated hardware device that creates and manages a virtual serial communication port. The virtual port is presented to legacy application |
| 6760781 |
Intelligent packet transmission engine |
July 6, 2004 |
| Autonomous retransmission of data packets onto a network from a Network Interface Card level upon command from a host processor is support. Efficient FIFO buffering in an ASIC is retained. Uses for autonomous retransmission include hardware and software testing and in network managem |
| 6760372 |
Adaptive signal processor using an eye-diagram metric |
July 6, 2004 |
| The invention is embodied in an adaptive filtering system for processing a received signal, including a signal processor having plural states to generate a processed signal from the received signal in accordance with a selected one of the states. A slicer produces from the processed sign |
| 6760309 |
Method of dynamic prioritization of time sensitive packets over a packet based network |
July 6, 2004 |
| An apparatus for and a method of dynamically prioritizing packets over a packet based network. Packets are dynamically prioritized on the basis of their `time to live` in the network as they travel from one network entity to another. Packets are assigned a priority in accordance with how |
| 6757908 |
Graphical representation of impairment or other conditions in a data-over-cable system |
June 29, 2004 |
| Impairment or other conditions (e.g., signal to noise ratio or noise floor) in a data-over--cable system are represented graphically in an easy to use and comprehensible manner, enabling quick identification and isolation of the source of the impairment. The graphical representation of t |
| 6757279 |
Method for synchronizing databases in stacked network units |
June 29, 2004 |
| In a stack of multi-port network communication units each unit has a forwarding database, the units are connected by way of a cascade, and at least some of the units are connected to links constituting a trunk. When a unicast data packet is received at a first of said units and the unica |
| 6757276 |
Touch tone replacement for internet telephony |
June 29, 2004 |
| Tones that are generated by a telephone or PC (such as DTMF tones) and subject to loss or noise during generation or during transmission along a medium are detected and replaced with substantially noise-free and distortionless digital signals. In one embodiment, the replacement of the |
| 6754622 |
Method for network address table maintenance in a data-over-cable system using destination reach |
June 22, 2004 |
| A method and system for network address maintenance in a data-over-cable system. The method includes determining whether a network device, such as a cable modem, responds to a request in a timely manner. When updating network address tables, such as Address Resolution Protocol tables, an |
| 6754310 |
Telephony interface device for providing diagnostic information to a telephone |
June 22, 2004 |
| An apparatus for providing diagnostic information to at least one telephone includes a telephony interface device operatively coupled to at least one telephone through a telephone line. The telephony interface device is operatively coupled to a network. The telephony interface device tra |
| 6754173 |
Trunk arrangement in a computer network with intra trunk switch connections |
June 22, 2004 |
| A trunk switch of a trunk cluster for connecting a plurality of edge devices to each other, where each edge device can communicate with all the other edge devices through all of the trunk switches. Each trunk switch contains an intra cluster port and intra cluster links connect the intra |
| 6753761 |
Power transfer apparatus for concurrently transmitting data and power over data wires |
June 22, 2004 |
| Power supply current, sufficient to power a remote network device, is transmitted concurrently with a network data signal over a transmission line. A power-sourcing network device that can include a coupling circuit provides power and data to the remote network device. The remote network |
| 6751700 |
Date processor and storage system including a set associative cache with memory aliasing |
June 15, 2004 |
| A data processor and storage system which comprises a data processor, a cache memory and a main memory is arranged so that the addressing of the main memory produces a multiplicity of spaced aliases, the multiplicity being greater than the set-associativity of the cache memory. The cache |
| 6751272 |
Dynamic adjustment to preserve signal-to-noise ratio in a quadrature detector system |
June 15, 2004 |
| In a system that demodulates a frequency modulated signal using a quadrature detector circuit, an apparatus that tunes the output signal to compensate for any offset in the signal includes an offset adjustment circuit and a control circuit. The offset adjustment circuit is operably c |
| 6751230 |
Upstream channel multicast media access control (MAC) address method for data-over-cable systems |
June 15, 2004 |
| A head-end in a data-over-cable system transmits a multicast message in a downstream channel to all the cable modems in a particular MAC layer. The message includes an address field that contains an upstream channel multicast MAC address that identifies a particular channel, and is used |
| 6751202 |
Filtered transmit cancellation in a full-duplex modem data access arrangement (DAA) |
June 15, 2004 |
| An improved data access arrangement device for use in full-duplex two-wire communication systems having a transmission impedance characteristic. The DAA includes a transmit amplifier and a receive amplifier adapted for connection to a two-wire line, a codec connected to the transmit ampl |
| 6748520 |
System and method for compressing and decompressing a binary code image |
June 8, 2004 |
| A system and method for compressing and decompressing a binary code image includes preprocessing the image to separately group together the operation codes and the operands that make up the binary code image into a columnar format. The resultant preprocessed data is then compressed using |
| 6745333 |
Method for detecting unauthorized network access by having a NIC monitor for packets purporting |
June 1, 2004 |
| A method is described a NIC to ascertain the presence of spoofing activity and thus detect unauthorized network access. The NIC monitors for packets purporting to be from itself. In one embodiment, a NIC views packets trafficking on its network and monitors for packets having its own MAC |
| 6744759 |
System and method for providing user-configured telephone service in a data network telephony sy |
June 1, 2004 |
| A system and method for providing user-configured telephone service to a user of a data network telephone. The user connects a data network telephone to the data network. The data network telephone registers with a telephone connection server to have basic calling service. The user a |
