Muhammad J Afzal

US Patent:

20030235274, Dec 25, 2003

Filed:

Jun 20, 2002

Appl. No.:

10/176014

Inventors:

Muhammad Afzal - Elk Grove Village IL, US

International Classification:

H04M001/24
H04M003/08
H04M003/22

US Classification:

379/001040, 379/015030

Abstract:

A system and method for testing lines in a network. The system and method are described in connection with a system for use with a telephone network to aid a network operator determine whether the any line can support high speed data services. According to the method, a mapping is created between low frequency measurements and average loop loss over a high frequency range. The average loop loss is sued to compute the equivalent working length of a line, which is an industry standard measure of the ability of a line to support high speed data services.

US Patent:

20050069029, Mar 31, 2005

Filed:

Sep 26, 2003

Appl. No.:

10/672821

Inventors:

Muhammad Afzal - Elk Grove Village IL, US

Assignee:

Teradyne, Inc. - Boston MA

International Classification:

H04B001/38

US Classification:

375222000

Abstract:

A system for identifying service affecting conditions on a subscriber line in the access portion of a broadband network, particularly an ADSL network. A measurement unit provides information on the line that aids in identifying projected performance. Information from a modem on the subscriber line indicative of actual performance is obtained and compared to the predicted values. Deviations are used to identify service affecting conditions and, depending on the nature of the deviations, the type of condition affecting service on the line. The physical measurements are used to identify the length of the subscriber line. Modem information is obtained through the MIB and allows determination of the bit loading on the line. Interference sources are identified by comparing the actual bit loading to bit loading expected for a line corresponding to the measured length.

US Patent:

20070153981, Jul 5, 2007

Filed:

Dec 29, 2005

Appl. No.:

11/322105

Inventors:

Muhammad Afzal - Elk Grove Village IL, US
Daniel Mueller - Evanston IL, US
Arthur Alamo - Milwaukee WI, US

Assignee:

Teradyne, Inc. - Boston MA

International Classification:

H04M 3/08
H04M 1/24
H04M 3/22

US Classification:

379022000, 379024000

Abstract:

A telephone line test system that may be used to compute line length of subscriber lines connected to a central office or other distribution point. When initially installed, the test system may automatically compute CO limits. The CO limits are computed from single-ended measurements on subscriber lines and represent electrical effects of the path between a test head and the distribution point. These CO limits are used to more accurately compute the length of lines connected to the distribution point using measurements made by the test system. Because the process uses single-ended measurements, it may be run in background mode during the initial installation of the test system or at any subsequent time it is desired to update the CO limits.

US Patent:

20120306895, Dec 6, 2012

Filed:

Jun 8, 2012

Appl. No.:

13/492658

Inventors:

Roger Faulkner - Swindon, GB
Leslie R. Hines - Maidenhead, GB
Frank R. Bauer - Long Grove IL, US
Gregory M. Nulty - Reston VA, US
Muhammad A. Afzal - Wexford PA, US
Manoj Sindhwani - Oak Hill VA, US

Assignee:

Tollgrade Communications, Inc. - Cranberry Twp PA

International Classification:

G06T 1/00
H04M 1/24

US Classification:

345501, 379 2701

Abstract:

A system for testing a conductor of a structure can include a test device connected to the conductor. The test device is configured to test an electrical characteristic of the conductor and to produce a test result based at least in part on the electrical characteristic. A service provider network may be configured to communicate with the test device to initiate a test and/or to obtain the test result. A customer may use a computing device to obtain information regarding the test result, as well as guidance for troubleshooting and resolving a problem detected with the electrical conductor, such as a fault.