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7099463 |
Method and apparatus for detecting a compatible phantom powered device using common mode signaling
A method and an apparatus provide for determining whether a data terminal equipment (DTE) device represents a compatible device lacking an independent power supply and adapted to be powered using...
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7088817 |
Method and apparatus for performing high-density DTMF, MF-R1, MF-R2 detection
Detectors determine the presence of valid sinusoids for DTMF, MF-R1 and MF-R2 protocols for encoding dialed digits. The detectors split electrical signals into subbands. Energies within the...
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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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7085373 |
Circuit and method for detecting AC voltage pulses
A detection circuit and method for detecting AC voltage pulses at a defined frequency relate to first transforming an input signal to a low-frequency signal by multiplying the input signal by a...
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7076056 |
Methods and apparatus for a bridge tap moderator
Methods and apparatus for protecting quality of service during a process involving bridge tap in a communications system are described. Bridge tap may occur during system construction, central...
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7076054 |
Output current and voltage regulating interface for remote terminal
A regulated power supply interface has a current feedback and voltage level shift circuit that monitors power supply output (load) current and controllably diverts current to a current reference...
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7076055 |
Tracking switchmode power converter for telephony interface circuit
A comparator-based switchmode power converter monitors the most negative of the tip and ring line voltages, to control the supply voltage to a SLIC. The voltage applied to the SLIC's power...
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7071703 |
Technique for estimation of a subscriber line insertion loss
A method and apparatus for pre-qualifying lines with respect to estimating the insertion loss of the line is presented. End-to-end insertion loss at high frequencies is estimated from measurements...
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7072463 |
Apparatus and method for programmable line interface impedance matching
A line interface capable of connecting to a variety of transport mediums, each having a different impedance. The line interface comprises a programmable resistor. The programmable resistor along...
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7072462 |
Estimation of DSL telephone loop capability using CAZAC sequence
A system for determining whether a telephone loop is capable of carrying a Digital Subscriber Line (DSL) signal. A Constant Amplitude Zero Auto Correlation (CAZAC) sequence signal is generated and...
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7068778 |
Integrated line inductor and line feed resistor
An integrated line inductor and line feed resistor is disclosed. A first coil winding and a second coil winding having a select resistance are magnetically coupled to each other. The first coil...
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7068758 |
Integrated metallic access for high port density DSLAM
A multi-services access platform is presented for supporting metallic test access in switching or multiplexing devices such as digital subscriber line access multiplexers (DSLAMs). The...
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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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7065205 |
Line sharing multipoint pots splitter amplifier-based coupler
The eavesdropping prevention system and method of the present invention provides for shunting leakage signals in a communication system. The amplifier-based coupler is constructed with amplifiers...
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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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7053756 |
Facilitating communication of data signals on electric power systems
The invention includes a method, system, and device for communicating a data signal on an electric power system. The inventive method includes communicating the data signal to the electric power...
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7050574 |
Telephone line interface circuit and method
A hybrid circuit is disclosed for effectively communicating information over a telecommunications line to which a transmitter and receiver are connected. The hybrid circuit is configured as a...
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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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7042991 |
Method and apparatus for extending a telephone's capabilities
An application programming interface (API) enables a telephone to utilize the hardware resources of a computer that is connected to the telephone in a master/slave relationship that causes the...
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7039180 |
Method and apparatus for enabling multiple protocol communication over a network
A method and apparatus for enabling multiple protocol communication over a network are disclosed. A first circuit communicates first signals in a first frequency band using a first data protocol...
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7039178 |
System and method for generating a simultaneous mixed audio output through a single output interface
A computer to telephone interface card comprises a plurality of audio data input ports, a mixer, and a converter. The mixer receives audio input data from audio data input ports and, in real-time,...
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7035396 |
Configurable echo canceller
A configurable adaptive echo canceler which can perform acoustical echo cancellation (AEC) or hybrid echo cancellation (HEC) under software control. Particular parameters based on the particular...
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7031454 |
Method and apparatus for interfacing telephone apparatus to a digital, analog or hybrid telephone switching system
An adaptive interface method and apparatus for interfacing a telephony appliance such as an analog telephone, modem, fax modem, facsimile machine teleconferencing device, headset, VoIP telephone or...
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7030733 |
Power supply for phantom-feed LAN connected device using spare-pair powering
A system for providing power to a local area network LAN connected device via spare wire pairs from a phantom feed LAN, the system comprising a first connector for connecting to the LAN connected...
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7031456 |
Method, device and system for output impedance calibration that invariably maximizes hybrid performance
A hybrid system with adjustable on-chip components and a method calibrating the same invariably maximizes hybrid performance despite of on- and off-chip component mismatches and imperfections. The...
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7031457 |
Programmable peak detector for use with zero-overhead Class G line drivers
A digital input signal is analyzed by a peak detector ( 210 ) configurable to trigger a first logic signal ( 260 ) if the peak detector detects the digital input signal level crossing a certain...
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7027590 |
Dynamic allocation of overhead voltage to support simultaneous transmission of signals on a telecommunication line
Overhead voltage is allocated in a telecommunication system among different AC signals, such as POTS, on-hook transmission POTS, PPM and XDSL signals, communicated between a telephonic switch and a...
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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...
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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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7020274 |
Universal apparatus and method for interfacing signals with telephony networks
A communication apparatus is used to interface signals with any one of a plurality of telephony networks having different impedances. The apparatus includes memory, a processor, a digital-to-analog...
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7020276 |
Frequency sensitive inductance device in POTS splitter design
POTS splitter design which incorporates a low-pass filter which improves the voice-band return loss characteristics without sacrificing performance with regard to the voice-band insertion loss or...
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7020187 |
Integrated modem and line-isolation circuitry with HDLC framing and associated method
An improved modem architecture and associated method that integrates modem and line-isolation circuitry so as to achieve modem functionality and system-side isolation functionality on a single...
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7020275 |
Method and apparatus for spectral containment over telephone service lines
A filter passing only desired frequencies is selected according to a desired level of service for copper lines. At a point of access between a loop plant and Central Office, the filter is...
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7006610 |
Download booster for ADSL transmission
Systems and methods are described for a download booster for ADSL transmission. A method includes extending a digital subscriber loop including: coupling a telephone company central office to a...
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6999743 |
Line interface with second order high pass transfer function
A transceiver system is disclosed for use in a telecommunication system. The transceiver system includes a transmission circuit including a differential transmitter input coupled to a differential...
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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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6993068 |
Method for estimating and synchronizing frame boundaries of mis-aligned cross-talk signals in a DMT system
In a telecommunications transmission system using a DTM system as a multicarrier system and having at least two VDSL systems, each including a pair of modems, the at least two VDSL systems...
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6990191 |
Method and apparatus for handling voice and data signals
A method and apparatus is provided for impedance matching for an apparatus capable of supporting voice and data. The method includes receiving an input signal having at least one of a voice...
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6990192 |
Combination telephone network interface device and cable TV splitter
A telephone and cable television network interface device includes a first housing having first and second compartments, a terminal located in the first compartment for connection to telephone...
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6985578 |
Low voltage broadband line driver
The present invention relates to broadband line drivers, comprising a cascade connection of an operational amplifier (A) and a transformer (T), which can be integrated on chip. This is obtained by...
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6980643 |
Fallback function telecommunications device
The invention herein is fallback function communications device comprised of a microprocessor, utilized to perform a predetermined operation and processing of a predetermined input signal and then...
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6978007 |
Communications systems
The communications system has a transmission network for transmitting useful data and control data. Call numbers are input at a subscriber terminal. A subscriber line unit with an adjustable...
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6978015 |
Method and apparatus for cooperative diagnosis of impairments and mitigation of disturbers in communication systems
A method that sends upstream a collection of data samples measured from a DSL line.
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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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6973180 |
Method for processing telephone signals supplied by an analog telephone terminal and data supplied by a data terminal
A method of handling telephone signals supplied by an analog telephone set and data supplied by a data terminal in a subscriber line circuit of a digital telephone switching system used at least in...
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6973181 |
Method of generating a ring signal in a subscriber line interface circuit technical field
In a method and a device for controlling the magnitude of the generated ring signal in a the Subscriber Line Interface Circuit (SLIC) the voltage of the A and B lines to the subscriber from the...
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6973182 |
Differential echo cancellation receiver with dynamic cancellation of excess DC output current
Differential echo cancellation receiver circuitry with dynamic cancellation of excess DC output current. Differential input circuitry provides for cancellation of incoming DC voltage and the...
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6970557 |
Cordless telephone-to-sound card interface adapter having a hybrid transformer circuit
A cordless telephone-to-sound card interface adapter provides a connection between any standard cordless telephone system and a sound card of a computer for PC-to-PC or PC-to-telephone voice...
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6970560 |
Method and apparatus for impairment diagnosis in communication systems
Events that occur in a number of in domain communication channels where each channel is used by a communication service, are detected. A Bayesian Belief Network (BBN) defines a probabilistic...
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6965670 |
Method for optimizing the transmission properties and the power loss of a high-voltage part which is integrated in a subscriber connection circuit for connecting a subscriber connection line
A method for optimizing the transmission properties and power loss of a high voltage part integrated in a subscriber line circuit for connecting a subscriber line wherein, during XDSL data...
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