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. 15, 2003
Filed:
Sep. 03, 1999
Applicant:
Inventors:
Sepehr Mehrabanzad, Southborough, MA (US);
Dae-young Kim, Lexington, MA (US);
John Pilozzi, Plainville, MA (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 1/38 ; H04B 1/404 ;
U.S. Cl.
CPC ...
H04B 1/38 ; H04B 1/404 ;
Abstract
In order to achieve reliable and efficient communication over public switched telephone networks (PSTN), voice-band modems utilize sophisticated start-up procedures. This invention involves a start-up procedure that allows an analog modem and a digital modem to establish a dial-up connection that utilizes PCM modulation in both upstream and downstream directions for data transmission.