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:
Mar. 02, 1993
Filed:
Apr. 12, 1991
Applicant:
Inventor:
Jeremy E Parsons, Emmitsburg, MD (US);
Assignee:
Telecommunications Techniques Corporation, Germantown, MD (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
375-31 ; 375-4 ; 370 131 ;
Abstract
An improvement to T1 digital communications systems uses the alternate mark inversion (AMI) encoding format, typically used in T1 systems, and the D.C. system that powers the repeaters for enabling quick and accurate in-service detection and identification of malfunctioning or failed repeaters.