At&t Intellectual Property I, L.p.

Other

Sbc Knowledge Ventures, L.p.

Sbc Properties, L.p.

Adaptive Spectrum and Signal Alignment, Incorporated

Richard Dennis Hart

Jin Wang

Raghvendra Savoor

Gary Tennyson

David Kimble

Kapil Vishwas Shrikhande

Frederick Armanino

Laxman Sahasrabuddhe

Xiaochuan Yi

John Matthew Cioffi

Xidong Wu

Canhui Ou

Stephen Albert Sposato

Peter Joshua Silverman

George Ginis

Bin Hong Lee

John Porter Van Slyke

G Keith Cambron

George Keith Cambron

Laurie G King

Clifford E Yackle

Systems and methods for detecting and analyzing discontinuities in a communications link are disclosed. In some embodiments, the systems and methods operate to project signals into the communications link and detecting reflected signals. The reflected signals are processed to define a transformed distribution of the reflected signals. A peak value in the transformed distribution is selected and a local fit to the selected peak value is performed using a model function. A residue distribution is formed based upon the transformed distribution and the model function. A location of the discontinuity based upon the residue distribution is identified, and another peak value from the residue distribution is selected. Additional systems and methods are disclosed.

Communications link discontinuity detection systems and methods

Example methods, apparatus, and articles of manufacture to trigger preemptive maintenance of vectored digital subscriber line (DSL) systems are disclosed. An example method includes generating a trouble ticket for a first subscriber loop based on a result of a diagnostic test, the diagnostic test being performed on the first subscriber loop when a value representing crosstalk coupling between the first subscriber loop and a second subscriber loop exceeds a threshold. The first subscriber loop and the second subscriber loop belong to a vectored group of subscriber loops contained in a same cable binder. The example method includes submitting the trouble ticket.

Methods, apparatus, and articles of manufacture to trigger preemptive maintenance in vectored digital subscriber line (DSL) systems

Example methods, apparatus and articles of manufacture to allocate ports to vectored digital subscriber line (DSL) groups are disclosed. A disclosed example method includes obtaining data representative of a statistical distribution of service penetration for a non-vectored DSL service, estimating an expected vectored DSL group size from the data, and configuring a DSL access multiplexer (DSLAM) to reserve a number of ports of the DSLAM for a vectored DSL group based on the expected vectored DSL group size.

Methods, apparatus and articles of manufacture to allocate ports to vectored digital subscriber line (DSL) groups

Apparatus, methods and articles of manufacture to predict vectored digital subscriber line (DSL) performance gains are disclosed. A disclosed example method includes determining a model coefficient of a noise-to-margin ratio (NMR) model from performance data measured for a DSL subscriber loop prior to provisioning of vectoring for the DSL subscriber loop, computing, using the model coefficient, a first NMR value with disturbers enabled and a second NMR value with disturbers disabled, and estimating an expected vectoring performance gain for the DSL subscriber loop based on the first and second NMR values.

Apparatus, methods, and articles of manufacture to predict vectored digital subscriber line (DSL) performance gains

A data analyzer operative to be located at a customer premises, causes the transmission of a probing signal into at least one telephone line. The data analyzer computes a parameter that represents a characteristic of at least one telephone line based upon at least a measured reflected probing signal.

Methods and apparatus to perform line testing at customer premises

Example methods, apparatus, and articles of manufacture to trigger preemptive maintenance of vectored digital subscriber line (DSL) systems are disclosed. An example method includes obtaining a value representing crosstalk coupling between a first subscriber loop and a second subscriber loop, the first and second subscriber loops belonging to a vectored DSL group of subscriber loops, determining whether to automatically perform a diagnostic test on the first subscriber loop based on the value, submitting a trouble ticket for the first subscriber loop based on a result of the diagnostic tests, and generating a maintenance report for the vectored DSL group based on the value and the results.

The present invention is directed to determining a length of at least one bridged tap on a transmission line. The invention includes estimating an Equivalent Working Length (EWL) associated with the transmission line using an Hspectrum by converting at least one Hdata point in an EWL estimation, determining the shortest EWL estimation to be an EWL associated with the tap, and determining loss due to the tap by subtracting the Hfor a straight piece of 26G wire of length EWL from the input data H. The losses are then removed from the Hspectrum using the EWL. A tap associated with a peak can be identified in a Fourier analysis of the Hspectrum. A length of a tap is determined using a Chi-squared analysis by verifying a tap, subtracting the theoretical loss due to the tap from the Hspectrum and repeating the process until all taps are identified.

Method for determination of bridged taps on a transmission line

In a particular embodiment, a method is disclosed that includes receiving data related to a customer premise equipment (CPE) device and determining an impedance mismatch between a transmission line and the CPE device based on the received data. The method further includes initiating removal of a source of the impedance mismatch in response to determining the impedance mismatch.

Systems and methods to determine an impedance mismatch

A system and method for imputing data into a database includes an imputing system operable to impute data based on outside plant construction principles. The imputing system includes an inventory database, a data engine, a search engine, and a loop engine. The inventory database includes a plurality of distribution records each associated with one or more cable pairs. The data engine determines if a desired distribution record corresponding to a desired cable pair includes missing data. The search engine searches a known class of serving terminals for complete distribution records and iteratively searches a sized binder group within the inventory database for one or more complete distribution records where the size of the binder group searched increases with each iterative search. The loop engine determines an imputed value for the desired distribution record based on the searching and imputes the value into the desired distribution record.

System and method for completing incomplete records in a database of twisted cable pair information

A system and method to perform double-ended measurements of a network is provided. The system includes a test device that makes measurements at the customer end and a portable computing device that interfaces with the test device, a customer gateway and database at a network location to analyze the data and determine a performance metric of the network.

System and method for automated double-ended field management of DSL service

An equivalent working length (EWL) determinative system () for use in a digital subscriber line (DSL) telecommunication network () is provided. The EWL system () includes a DSL circuit () having a customer site () with customer premises equipment (). The customer premises equipment () receives and transmits communication signals and generates a first attenuation signal in response to the communication signals. A remote terminal () forms a loop () with the customer site () and has a loop length. The remote terminal () includes a remote terminal transceiver () that is in communication with the customer premises equipment (). A main controller () is electrically coupled to the customer premises equipment () and determines an EWL of the loop () in response to the first attenuation signal. A method of performing the same is also provided.

Equivalent working length determinative system for digital subscriber line circuits

A dual-mode broadband modem operative to operate in a service mode and a surveillance mode is disclosed. Generally, the dual-mode broadband modem comprises a primary communication device; a secondary communication device; a central processing unit in communication with the primary and secondary communication devices; and a memory unit in communication with the central processing unit. In the service mode, the primary communication device communicates with a broadband service provider and the central processing unit stores historical information regarding performance of the primary communication device in the memory unit. If an interruption in broadband service is detected, or the performance of the primary communication device falls below a predetermined threshold, the dual-mode broadband modem switches to surveillance mode and the secondary communication device is activated. The secondary communication device communicates with the broadband service provider to send at least a portion of the historical information regarding performance of the primary communication device to the broadband service provider for processing to determine a source of the interruption in broadband service or a source of the decreased performance of the primary communication device.

Dual-mode broadband modem

In a particular embodiment a method of collecting and processing modem data is provided. The method includes, during training of a broadband modem, sending a series of tones within a frequency transmission band of the broadband modem, receiving the transmitted series of tones at a receiving broadband modem, receiving a measurement value, determining a transmission loss for each of the series of tones by comparing the predetermined transmission power level, and the received measured power level, performing a statistical match comparison between each of the received tone signals and a plurality of different computer models of a single transmission facility having various bridge taps connected to the single transmission facility, and determining a best fit between each of the received tone signals and one of the plurality of the bridge tap computer models. The series of tones have a predetermined transmission power level.

Growing community of inventors

Concord, CA, United States of America

Richard Dennis Hart