Joseph C Chapman

US Patent:

6574308, Jun 3, 2003

Filed:

May 8, 2001

Appl. No.:

09/851457

Inventors:

Alistair Malcolm Macdonald - Oldsmar FL
Joseph Q. Chapman - Seminole FL

Assignee:

Paradyne Corporation - Largo FL

International Classification:

H04M 124

US Classification:

379 104, 379 2701, 379 2901, 379 2204, 375224

Abstract:

A communication device transmits very low frequency signals in order to help diagnose the cause of a communication problem in a DSL communication system. The communication problem may be, for example, the inability of a remote data transceiver unit (DTU-R) to successfully train-up with a central data transceiver unit (DTU-C). The very low frequency signals may be used to communicate the status or settings of the remote transceiver unit to the DTU-C, to download settings parameters or executable code to the DTU-R, or to coordinate the transmission of testing signals.

US Patent:

6950444, Sep 27, 2005

Filed:

Aug 11, 2000

Appl. No.:

09/637185

Inventors:

Kurt Holmquist - Largo FL, US
Joseph Chapman - Seminole FL, US

Assignee:

Paradyne Corporation - Largo FL

International Classification:

H04L012/56

US Classification:

370476, 370477

Abstract:

A method and system for robust delimiting of transmitted messages in switched-carrier operation in which a preamble precedes each communication message with the preamble comprising symbols transmitted at a rate lower than that of the following data. The lower rate symbols of the preamble significantly increase the probability that the decoder will decode the preamble symbols error free. Communication line control information can be included in the robust preamble, thereby ensuring that line control information is reliably transferred over the communication channel. The first symbol of the preamble can be transmitted at the lower symbol rate and at an increased power level, thereby clearly and reliably delimiting the beginning of a transmission. The end of the communication message can be reliably delimited by sending the first symbol containing only bits from a next cell of information at a lower symbol rate and including an extra bit in that symbol. The extra bit can be set to indicate to a receiver whether the last cell of information has just begun.

US Patent:

7106834, Sep 12, 2006

Filed:

Apr 8, 2003

Appl. No.:

10/409260

Inventors:

Alistair Malcolm Macdonald - Oldsmar FL, US
Joseph Q. Chapman - Seminole FL, US

Assignee:

Paradyne Corporation - Largo FL

International Classification:

H04M 1/24
H04M 3/08
H04M 3/22
H04B 17/00

US Classification:

379 104, 379 2204, 379 2701, 379 2901, 375224

Abstract:

A communication device transmits very low frequency signals in order to help diagnose the cause of a communication problem in a DSL communication system. The communication problem may be, for example, the inability of a remote data transceiver unit (DTU-R) to successfully train-up with a central data transceiver unit (DTU-C). The very low frequency signals may be used to communicate the status or settings of the remote transceiver unit to the DTU-C, to download settings parameters or executable code to the DTU-R, or to coordinate the transmission of testing signals.

US Patent:

7289610, Oct 30, 2007

Filed:

May 8, 2003

Appl. No.:

10/435219

Inventors:

Gordon Bremer - Clearwater FL, US
William L. Betts - St. Petersburg FL, US
Edward A. Thoenes - St. Petersburg FL, US
Joseph Q. Chapman - Seminole FL, US

Assignee:

Summit Technology Systems, LP - Bala Cynwyd PA

International Classification:

H04M 11/00

US Classification:

379 9308, 379 9331

Abstract:

The preferred embodiments of the present invention generally provide improved communications over a subscriber loop that is loaded with at least one and potentially a plurality of load coils. The preferred embodiments of the present invention will work over loaded subscriber loops that also support a native POTS interface as well as over loaded subscriber loops that are not providing a native POTS interface. Furthermore, although the preferred embodiments of the present invention are intended to address the technical and business problems of service providers delivering digital subscriber line service over loaded loops, the preferred embodiments will also work over unloaded loops. Various duplexing strategies such as, but not limited to, time-division duplexing (TDD), adaptive time-division duplexing (ATDD), four-wire duplexing, and/or extended performance echo cancelled duplexing (EP ECD) provide improved performance on loaded loops that generally offer significant signal attenuation at frequencies above 4 KHz. In addition, such duplexing strategies can start and stop quickly enough to pass various POTS interface signaling generally without creating a significant adverse effect on DSL data communications.

US Patent:

7782933, Aug 24, 2010

Filed:

Aug 29, 2006

Appl. No.:

11/467967

Inventors:

Alistair Malcolm MacDonald - Oldsmar FL, US
Joseph Q. Chapman - Seminole FL, US

International Classification:

H04B 17/00

US Classification:

375224

Abstract:

A communication device transmits very low frequency signals in order to help diagnose the cause of a communication problem in a DSL communication system. The communication problem may be, for example, the inability of a remote data transceiver unit (DTU-R) to successfully train-up with a central data transceiver unit (DTU-C). The very low frequency signals may be used to communicate the status or settings of the remote transceiver unit to the DTU-C, to download settings parameters or executable code to the DTU-R, or to coordinate the transmission of testing signals.

US Patent:

20020167949, Nov 14, 2002

Filed:

Jun 25, 2002

Appl. No.:

10/179544

Inventors:

Gordon Bremer - Clearwater FL, US
Kurt Holmquist - Largo FL, US
Joseph Chapman - Seminole FL, US
Robert Scott - Largo FL, US

International Classification:

H04L012/28
H04L012/66

US Classification:

370/395100, 370/474000, 370/465000, 370/463000, 370/351000, 370/400000

Abstract:

Embodiments of the present invention provide communication of Asynchronous Transfer Mode (ATM) data using variable duration ATM frames between a data terminal unit (DTU) at a central office and a remote DTU at a user premises. One embodiment of the present invention can be viewed as a communication device which communicates data in an asynchronous transfer mode (ATM) format, the device comprising at least one buffer configured to receive data from a sending device, and a modulation unit coupled to the buffer and configured to encapsulate a plurality of ATM cells into an ATM frame, the plurality of ATM cells having the received data, so that the ATM frame is communicated onto a subscriber line, such that the communicated ATM frame has a variable transmission duration, the variable transmission duration corresponding to a number of the plurality of ATM cells encapsulated into the ATM frame.

US Patent:

20050025153, Feb 3, 2005

Filed:

May 6, 2002

Appl. No.:

10/500450

Inventors:

Gordon Bremer - Clearwater FL, US
Kurt Holmquist - Largo FL, US
Joseph Chapman - Seminole FL, US
Robert Scott - Largo FL, US

International Classification:

H04L012/56

US Classification:

370395100

Abstract:

A device configured to encapsulate a plurality of ATM cells (through ) into an ATM frame (), the plurality of ATM cells (through ) having the received data, so that the ATM frame () is communicated onto a subscriber line (), such that the communicated ATM frame () has a variable transmission duration, the variable transmission duration corresponding to a number of the plurality of ATM cells (through ) encapsulated into the ATM frame ().

US Patent:

20050152404, Jul 14, 2005

Filed:

Mar 10, 2005

Appl. No.:

11/076737

Inventors:

Kurt Holmquist - Largo FL, US
Joseph Chapman - Seminole FL, US

International Classification:

H04L005/16

US Classification:

370485000

Abstract:

A method and system for robust delimiting of messages in switched-carrier operation in which a preamble precedes each message. The preamble comprises symbols transmitted at a rate lower than that of the following data. The lower rate significantly increases the probability that decoding of the preamble symbols will be error-free. Communication line control information can be included in the preamble, thereby ensuring that line control information is reliably transferred over the channel. The preamble's first symbol can be transmitted at the lower symbol rate and at an increased power level, thereby reliably delimiting the beginning of a transmission. The end of the message can be reliably delimited by sending the first symbol which contains only bits from a next cell of information at a lower symbol rate, and including an extra bit in that symbol. The extra bfit can indicate to a receiver when the last cell of information begins.