The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 11, 2000
Filed:
Mar. 13, 1997
Bert A Davenport, Chicago, IL (US);
James A Renkel, Warrenville, IL (US);
Peter P Jankus, Chicago, IL (US);
U. S. Robotics Access Corp., Skokie, IL (US);
Abstract
A method for determining characteristics of a data communication channel between first and second data communication devices. The method includes the step of sending a relatively low power digital probe signal over said channel from said first to said second data communication devices. The method further includes sending a second digital probe signal corresponding to an analog signal having a relatively high-frequency signal with a time-varying dc component from said first to said second data communication devices. The second data communication device receives a signal, said received signal corresponding to said probe signals sent by said first device. In addition, the second data communication device determines whether said received signal varies from a predetermined standard.