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6823004 |
Methods, systems and computer program products for monitoring performance of a modem during a connection
Methods, systems and computer program products are provided for monitoring performance of a modem which obtain diagnostic data directly from memory associated with the modem's digital signal...
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6823024 |
Compensation circuit and method for compensating for an offset
To demodulate a frequency-modulated signal having an offset, two time constants are provided in a filter unit. The filter unit has two analog or digital low-pass filters or high-pass filters. A...
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6819716 |
System, device, and method for time-domain equalizer training using injected out-of-band noise
A system, device, and method for time-domain equalizer training injects noise into the received training signal prior to determining time-domain equalizer coefficients and determines the...
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6819880 |
Loss of signal detection circuit for light receiver
An increase in the code error rate in a received signal is detected in a light receiver. An loss of signal detector circuit for a light receiver 20 comprises a main discrimination circuit 8 a ...
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6816544 |
High performance communications interface
A parallel interface is provided between a standard parallel port of a computer system and a modem so as to increase the data transfer rate between the two systems without modifying the hardware of...
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6810076 |
Efficient echo canceller for ADSL applications
Architecture of an efficient adaptive digital echo canceller includes a frequency domain update block, a far-end signal estimation block and a time domain echo cancellation block. The echo...
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6810077 |
System and method for providing informative communication
A system and method for providing informative communications while a connection is being established between two communications devices, such as computers or facsimile machines. The method includes...
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6807195 |
Synchronization arrangement for packet cable telephony modem
The generation and upstream transmission of voice packets in an HFC network is controlled by including a synchronization circuit in the broadband terminal interface unit. The synchronization...
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6804292 |
Broadband I/O circuits, interface and bus
A broadband digital communications link, protocol and related I/O circuits are provided which use an embedded control channel and a frame structure for transferring control information between...
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6804267 |
Transceiver training for DSL modems under TCM-ISDN interference
Transceiver training is optimized for xDSL modems operating in TCM-ISDN environments under NEXT and FEXT interference. Current ITU-T draft recommendations provide for dual bitmaps that are switched...
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6801570 |
Intelligent rate option determination method applied to ADSL transceiver
A system and method that generates rate options for ADSL transceivers is described. The system and method dedicates discrete multitone symbol bandwidth to bearer channels based on a prioritization...
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6801495 |
High capacity robust modem for multiple classes of services
A low-cost data communication system and method using modems to provide high speed multi-class services to subscribers is disclosed. In the present invention, an n-bit orthogonal modulating code is...
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6799056 |
Computer system including multi-channel wireless communication link to a remote station
A computer system which is capable of transmitting information content through walls and other barriers to a remote station such as a home entertainment system. The system tests a plurality of...
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6799030 |
Method and apparatus for low power operation of an RF wireless modem
The present invention provides for a method and apparatus for extending battery life in a radio frequency (“RF”) wireless modem by automatically commanding the RF modem into a low power,...
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6798829 |
Transmitting apparatus and transmitting method, receiving apparatus and receiving method, and distribution medium
Upon reception of the group ID and sound volume control signal, a selecting means refers to a control group ID management memory to determined whether the part being supplied belongs to the...
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6799225 |
Controllerless modem
A computer system implements a standard modem without the use of a microcontroller. Instead, a digital signal processor is provided on an expansion card, but with direct links to the computer...
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6792030 |
Method and apparatus for delivering non-obtrusive data services by spread spectrum modulation
The invention provides a method and apparatus for establishing a non-obtrusive data channel within a voice communication channel to transmit data during an audio transmission without disruption....
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6792039 |
Method for controlled reducing of processor utilization by a soft modem and a soft modem with controlled different processor utilization modes
A soft modem having a plurality of selectable operational modes. Each of the operational modes has a different nominal processor utilization level. The soft modem uses a method for changing its...
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6791993 |
Virtual gateway system and method
Existing (already installed) plain old telephone service (POTS) wiring at a customer premises is used as the wiring infrastructure for a local area network and additionally continues to provide...
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6792040 |
Modems having a dual power mode capability and methods of operating same
Modems, methods, and computer program products provide a dual power mode capability in which a maximum power limit is determined for a received signal and, based on that determination, at least one...
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6788705 |
Transmitting DSL startup parameters over a voice channel
Digital Subscriber Line (DSL) modems allow high-speed data to be sent over telephone lines normally used for analog voice service. In cases of impaired DSL line performance, diagnostic information...
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6785326 |
Method and apparatus for detecting and compensating digital losses in a communications network
The present invention relates generally to impairment detection and compensation in a communications network. One embodiment includes a method for generating an adaptive Digital Impairment Learning...
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6785556 |
Method and apparatus for a software configurable wireless modem adaptable for multiple modes of operation
The present invention provides for a software configurable wireless modem that can be configured using software downloaded by a host computer. The user can select a preferred mode of operation, or...
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6785339 |
Method and apparatus for providing speech quality based packet enhancement in packet switched networks
An apparatus ( 200 ) checks voice quality when in a vocoder bypass mode. If the voice quality level is beyond an acceptable range, the apparatus ( 200 ) ends the vocoder bypass mode and returns to...
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6782042 |
Methods and devices for simplifying blind channel estimation of the channel impulse response for a DMT signal
Blind channel estimates of the impulse response of a channel are determined for discrete multitone modulated (“DMT”) signals. Novel methods and devices used to complete the estimates make use...
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6778595 |
ADSL modem
An ADSL modem connected to the telephone line is disclosed, which even in the case where a plurality of ADSL modems are connected to a single telephone line installed in a SOHO application or in...
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6778596 |
Method and multi-carrier transceiver with stored application profiles for supporting multiple applications
A digital subscriber line system includes two transceivers in communication over a communication channel using multicarrier modulation. Application profiles are defined for characterizing...
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6778597 |
Distinguishing between final coding of received signals in a PCM modem
A method for determining the encoding law of an incoming signal in a network which possibly contains an A-μ or μ-A conversion includes obtaining digital impairment learning (DIL) probing data,...
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6775297 |
Computer-based conversion of digital signals
An apparatus for transforming digital data into encoded digital data describing analog signals representing the digital data. The apparatus comprises a CPU, memory, and control logic for the data...
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6775320 |
Method and a multi-carrier transceiver supporting dynamic switching between active application sets
A transceiver and method for communicating over a communications channel having a plurality of subchannels are described. In particular, the transceiver is capable of dynamically switching between...
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6771697 |
Spread spectrum handshake for digital subscriber line telecommunications systems
Handshake information for xDSL services is transmitted utilizing a spread spectrum modulated system where a plurality (n) of carrier tones (n>2) are summed and utilized as a spread spectrum...
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6771696 |
Integrated modem and line-isolation circuitry and associated method utilizing a DC termination pin to monitor line voltage
An improved modem architecture and associated method are disclosed that integrate modem and line-isolation circuitry so as to achieve modem functionality and system-side isolation functionality on...
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6771695 |
Low-complexity DMT transceiver
A DMT signal conforming to a first DMT standard (e.g., the full-rate G.dmt standard based on 255 tones) is sampled at a sampling rate for the first DMT standard, filtered to attenuate a subset of...
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6768912 |
Radio base station apparatus with inter-shelf communication
A radio base station apparatus includes first and second shelves having a similar structure, each shelf includes a shelf current use system transmission signal processing circuit, a shelf standby...
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6769132 |
Signal splitter matrix for a cable modem termination system
In a cable data system, several frequency division multiplexed upstream data signals on an individual cable can be selectively routed to frequency-selective band pass filters using a relay matrix...
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6768771 |
Multimode modem with automatic negotiation of operational mode
Apparatus and methods for determining an operational mode of a far-end modem are disclosed. Where the multimode modem is a call initiator, a method according to the invention includes transmitting...
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6768777 |
Method and apparatus for calculating the number of very high speed digital subscriber line nodes
A method is provided for estimating a number of digital subscriber line nodes ( 220, 230 ) required to supply, from a line supply source ( 200 ), a geographically distributed network of...
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6766162 |
Message notification system for wireless communication system
A method and apparatus for indicating message status in a wireless communication system comprising a base station configured to communicate with at least one mobile unit over a wireless interface....
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6765925 |
Apparatus and method of maintaining state in a data transmission system
An apparatus and method of maintaining state information for a network device changing from a first channel (in communication with a first base unit) to a second channel (in communication with a...
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6765967 |
PCM codec and modem for 56k bi-directional transmission
A high-speed analog subscriber modem operates at speeds as high as 64 kbps in both the downlink and uplink directions using a standard POTS line augmented with an enhanced codec. This enables...
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6765955 |
Methods, systems and computer program products establishing a communication configuration for a modem connection to compensate for echo noise
Methods, systems and computer program products for configuring a modem communication session when conditions associated with echo noise on a digitally discontinuous channel are detected are...
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6765956 |
Multiple sampling frame synchronization in a wireline modem
A modem comprises circuitry for receiving an analog signal from a line and circuitry for converting the analog signal to a digital signal. The digital signal comprises a plurality of ideal sample...
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6763018 |
Distributed protocol processing and packet forwarding using tunneling protocols
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...
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6763060 |
Communication system employing a network of power managed transceivers that can generate a clocking signal or enable data bypass of a digital system associated with each transceiver
A communication system is provided for interconnecting a network of digital systems. The communication system includes a communication line and a transceiver placed between the communication line...
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6760300 |
High speed wireless OFDM transceiver modem
An apparatus for receiving and/or transmitting signals using orthogonal frequency division multiplexing, said apparatus being adapted for outputting a first output signal, comprising: a time...
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6760368 |
Fast retraining method, apparatus, and storage medium in an xDSL transceiver
The process in an xDSL transceiver transfers into a fast retraining sequence when the cause of an error on a telephone circuit is a change from an off hook state to an on hook state of a telephone...
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6760333 |
Hybrid digital subscriber loop and voice-band universal serial bus modem
A Universal Serial Bus (USB) modem ( 14 ) having two operating modes, namely Digital Subscriber Loop (DSL) mode and a voice-band mode, is disclosed. A USB interface device ( 30 ) is coupled to a...
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6757732 |
Text-based communications over a data network
A communications system ( 10 ) includes a packet-based data network ( 12 ) that is coupled to various network elements ( 14, 16, 18, 20, 22 , and 34 ) that are capable of participating in...
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6757325 |
Methods, modems and computer program products for identification of a modem type and adjustment of a communication configuration based on modem type
Methods, modems and computer program products for detecting whether a remote modem is of a particular design type and for adjusting the communication configuration for a communication session based...
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6757764 |
Method and apparatus for transferring information using a constant frequency
An information transfer apparatus including an information source connected to an information to constant frequency converter, a transmitter connected to the information to constant frequency...
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