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8150026 |
Method and system for subscriber line interface circuit
A subscriber line interface circuit apparatus includes a linefeed circuit and a subscriber line control circuit (SLCC). In an embodiment, the linefeed circuit includes a signal conversion circuit...
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8102837 |
Network coding approach to rapid information dissemination
A method, apparatus and computer program product for providing rapid information dissemination using network coding is presented. A coded message including a payload and a code vector, is...
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7912210 |
Inductive coupling for communications equipment interface circuitry
A system for improving the attenuation of an undesired signal found in a differential signal path through the use of inductive coupling. The system includes a primary inductor, a secondary...
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7904578 |
Bandwidth and topology management device for home networks
Systems, methods, and equipment for use in the management of network topology and bandwidth for computing networks are provided. In an illustrative implementation of a device acting as a patch...
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7804954 |
Infrastructure for enabling high quality real-time audio
Various technologies and techniques are disclosed that improve media communications. In one embodiment, a media server receives a media communication with a first quality from a personal computer...
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7720201 |
Communication apparatus
In a communication apparatus has a line control unit that controls connection with a communication line network, a communication unit transmits/receives data through the communication line network....
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7664253 |
Main terminal and a method of operating the same
A main terminal and a method of operating the same. In this method of operating the main terminal, the main terminal is connected to a telephone network so as to communicate with the telephone...
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7657010 |
System and method for establishing a high speed non-switched data connection
A system and method for establishing a high speed, substantially constant circuit based data connection over a conventional telephone line is provided. The circuit based connection is non-switched,...
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7630489 |
Adaptive communication systems and methods
Methods and communication systems are presented, in which impulse noise is monitored on a communication channel, and impulse noise protection parameters are adjusted according to the monitored...
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7583797 |
Single ended analog front end
An analog front end. The analog front end comprises a converter configured to convert a differential input signal to a single-ended input signal, and convert a single-ended output signal to a...
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7543220 |
Control method for error detection & correction apparatus, error detection & correction apparatus, and computer-readable storage medium storing control program for error detection & correction apparatus
The present invention provides a control method for an error detection & correction apparatus, comprising a plurality of data processing apparatuses which reside in a data communications path and...
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7539299 |
Office-line trunk circuit operating on ground-start and loop-start modes, method of controlling same, and control program for same
An office-line trunk circuit is provided to selectively operate on ground-start and loop-start modes. In this circuit, a DC current detection circuit has (i) a first photo coupler detecting a DC...
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7463732 |
Flexible data outlet
A flexible data outlet includes a housing configured for placement in an operating area of a user, such as on a wall adjacent to a user's work space. User interface circuitry in the housing...
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7463675 |
Direct digital access arrangement circuitry and method for connecting to phone lines
An isolation system is provided that is suitable for use in telephony, medical instrumentation, industrial process control and other applications. Preferred embodiments of the invention comprise a...
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7324632 |
Distribution device in a data signal processing installation, and data signal processing installation
The invention relates to a distribution device (2) in a data signal processing installation (1), and a data signal processing installation (1). The distribution device comprises a distribution...
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7263646 |
Method and apparatus for skew compensation
A method that measures a skew between a data signal and a clock signal at a receiving end of a serial link and then adjusts a phase relationship between the data signal and the clock signal to...
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7257758 |
Stumping mechanism
An Infiniband device can have an input port operable to receive a packet and to forward the packet to an output port of the device for onward transmission toward an ultimate destination of the...
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7254230 |
Subscriber line interface circuitry
A subscriber line interface circuit apparatus includes a signal processor having sense inputs for sensed tip and ring signals of a subscriber loop. The signal processor generates linefeed driver...
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7242761 |
System and method for determining the transmit power of a communication device operating on digital subscriber lines
A system for determining the transmit power of a communication device operating on a twisted pair subscriber line includes a communication server coupled to a first subscriber line and a second...
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7215764 |
Current sensing echo cancellation device
A passive echo cancellation circuit for reducing echoes on a subscriber line includes an output driver adapted to drive a downstream signal on the subscriber line. First sensing circuitry is...
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7191378 |
Method and system for providing low density parity check (LDPC) encoding
An approach is provided for a method of encoding structure Low Density Parity Check (LDPC) codes. Memory storing information representing a structured parity check matrix of Low Density Parity...
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7184543 |
Method and circuit arrangement for controlling a subscriber line interface circuit
The invention provides a method for controlling a subscriber line interface circuit, which is connected to at least one data line and to at least one subscriber line associated with a subscriber,...
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7162029 |
Gain or input volume controller and method utilizing a modified R2R ladder network
A gain or input volume controller and method includes a modified R2R ladder network having a number of R2R branches, switches coupled respectively to the R2R branches, and a switch controller for...
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7110531 |
Isolation system with analog communication across an isolation barrier
An isolation system with analog communication across an isolation barrier includes an isolation barrier circuit having at least one isolation element; a digital to analog circuit having an analog...
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7095847 |
DC/DC converter and subscriber line interface circuit
A DC/DC converter capable of preventing abnormal temperature increase in a power transistor. The DC/DC converter comprises a loop circuit, a power transistor, an abnormal high temperature detection...
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7085372 |
Method and device for transmitting a transmission signal via a two-core line
Method and apparatus for transmitting a transmission signal via a two-core line, in particular a telephone line, in which case, with the aid of corresponding transmission devices (2, 3), two...
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7076260 |
Unbalanced coding for cordless telephony
In a digital cordless telephone system, a different speech coding scheme is used in the audio path from the base unit to its remote handset than that which is used in the audio path in the opposite...
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7068756 |
Multi-interface telephony test system using separate interface cards
The present invention provides a method to configure the hardware and software resources in a system to utilize two physical interface boards in pairs such that their aggregate units of voice...
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7062037 |
Generic line impedance matching circuit using decomposed configurable transfer functions
A technique for implementing impedance matching circuits 100 that use the transfer functions of each line impedance model. This technique allows implementation of an impedance match for a diverse...
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7046793 |
Digital access arrangement circuitry and method having current ramping control of the hookswitch
A digital direct access arrangement (DAA) circuitry may be used to terminate the telephone connections at the user's end to provide a communication path for signals to and from the phone lines....
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7031458 |
Method and apparatus for isolation in a data access arrangement using analog encoded pulse signaling
The present invention is directed toward a method and apparatus for transferring data across an isolation barrier using high speed analog encoded signals. A line side circuit interfaces with tip...
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7027589 |
Single-ended loop test circuitry in a central office DSL modem
A central office modem (50) that includes the capability of single-ended loop testing (SELT) is disclosed. The modem (50) includes a digital signal processor (54), a codec (56), line driver and...
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7024157 |
Local area network computer system utilizing radiating transmission line
A radio frequency communication system utilizing a radiating transmission line for communicating data signals is disclosed. The data signals convey digital data to remotely located data devices,...
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6999581 |
Event detection circuit
A network interface circuit that screens out transient signals and provides an indication to the line side that an actual event has occurred, so that appropriate discrimination circuitry is powered...
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6975723 |
Architecture for minimum loop current during ringing and caller ID
A communication system is provided which draws virtually no loop current during a ringing burst and only draws on-hook loop current during the caller ID field. More particularly, ringer burst...
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6940969 |
Capacitor cancellation method and apparatus
A capacitor cancellation method and apparatus for use in an interface circuit having a transformer blocking capacitor. The method includes sensing a voltage across the transformer blocking...
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6937852 |
Portable communication device
A portable communication device for conference calls, comprising at least first and second speech encoder paths with first and second inputs for connection to first and second recording devices,...
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6931121 |
Dual personality analog port
An RJ 11 port is disclosed that detects the device to which it is connected and automatically reconfigures itself as end user equipment or network interface equipment.
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6925172 |
Line interface with gain feedback coupled matching impedance
A transceiver system is disclosed for use in a telecommunication system. The transceiver system includes a transmission circuit including a transmitter input coupled to an input of a transmission...
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6920218 |
Combination clock and charge pump for line powered DAA
Disclosed is a method and apparatus which facilitates the use of existing power that is ordinarily unused or discarded to provide power to a telephone interface circuit when the circuit is in the...
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6909781 |
DSL line tester
An analog front end system comprising a digital-to-analog converter, a line driver, a multiple-input device, and an analog-to-digital converter is presented. Furthermore, a method for DSL line...
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6888939 |
Circuit for joint transmitting voice and data over a telephone line
The invention relates to an SLIC circuit (1), which is connected directly to a telephone line (2), for joint transmission of voice and data via the telephone line (2), with adequate echo...
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6853724 |
Cascade low-pass filter to improve xDSL band attenuation for POTS splitter
Cascade low-pass filters are useful in attenuating the xDSL band in a POTS splitter. The design of the low-pass filter is a sixth-order filter having two stages. A first stage includes a...
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6847702 |
Systems and methods for enhanced reliability in a communication system
Disclosed are systems and methods for transferring data between servers and subscribers. A central office employs DSL circuit cards. Each DSL circuit card encodes a digital signal using a discreet...
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6826278 |
Central office interface techniques for digital subscriber lines
A digital subscriber line and POTS voice interface between a telephone line and central office equipment is provided. For POTS band frequencies, a reactive impedance coupled across the two wire...
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6782095 |
Method and apparatus for performing spectral processing in tone detection
A general purpose network tone detection method and apparatus that allows the precise and accurate recognition of North American tones (MF, DTMF (Dual-Tone Multifrequency), and CPT (Call Progress...
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6778665 |
Distribution of current draw in a line powered DAA
A line powered data access arrangement (DAA) is disclosed which adaptively allows proper operation with power supplied from a telephone line as conditions warrant, while at the same time satisfying...
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6760433 |
Central office interface techniques for digital subscriber lines
Techniques for interfacing a telephone line and central office equipment of a network operator providing and digital subscriber line data services are disclosed. The interface is splitterless in...
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6744888 |
Line interface circuit with event detection signaling
A telephone line interface circuit with event detection capabilities is provided that screens out transient signals and provides an indication to the line side that an actual event has occurred; so...
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6735305 |
Detection of low tip/ring currents in a line powered DAA
A line powered data access arrangement (DAA) is disclosed which adaptively allows proper operation with power supplied from a telephone line as conditions warrant, while at the same time satisfying...
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