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:
Sep. 16, 1997
Filed:
Nov. 29, 1995
Applicant:
Inventor:
Hirokazu Mukai, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04M / ; H04N / ;
U.S. Cl.
CPC ...
37910001 ; 358434 ; 358468 ; 379 9326 ;
Abstract
In a facsimile apparatus capable of executing automatic call termination on detecting a terminating signal, a control device has a frequency detection circuit and a frequency detection control circuit. The frequency detection circuit detects a terminating signal of, e.g., 1300 Hz by monitoring not only the frequency of 1300 Hz but also other frequencies. The frequency detection control circuit accurately determine, based on the output of the frequency detection circuit, whether an input from a network is the terminating signal of 1300 Hz or whether it is noise containing a 1300 Hz component.