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:
May. 07, 2002
Filed:
Jun. 22, 1999
Applicant:
Inventor:
Yoshiaki Numata, Miyagi, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N 1/00 ; H04J 1/500 ;
U.S. Cl.
CPC ...
H04N 1/00 ; H04J 1/500 ;
Abstract
A facsimile module self-diagnostic system is provided that can detect a failure occurring in the transmission-side demodulation circuit or in the reception-side re-modulation circuit in a facsimile module. A test facsimle signal generation circuit ( ) is provided on the transmission side of the facsimile module. A test facsimile signal judgement circuit ( ) is provided on the reception side of the facsimile module. In a test facsimile signal judgement zone, the test facsimile signal judgement circuit ( ) inspects a test DCS (Digital Command Signal) signal at the first stage and inspects a test TCF (Training Check) signal at the second stage.