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:
Nov. 01, 1994
Filed:
May. 07, 1993
Applicant:
Inventors:
Charles J Malek, Crystal Lake, IL (US);
Robert W Furtaw, Schaumburg, IL (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L / ; H04J / ; H04M / ;
U.S. Cl.
CPC ...
380 48 ; 370109 ; 379 58 ; 379 62 ; 379 93 ; 380 28 ; 380 33 ; 380 49 ;
Abstract
A method for transparently coupling an encrypted two-way RF communication unit (100) with an encrypted landline communication unit (104). An RF message comprised of a plurality of data frames (401,402, 403) is transmitted from the RF communication unit (100), wherein a plurality of the data frames include encrypted voice information (403). Some bits from the data frames (501,502) are selectively removed, without removing the encrypted voice information (503), to form reduced bit data frames, and the reduced bit data frames are transmitted via the landline to the landline communication unit (104).