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:
Jun. 05, 2018
Filed:
Sep. 14, 2016
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventors:
Eiji Ohara, Kashiwa, JP;
Hiroshi Fukada, Kashiwa, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04M 11/00 (2006.01); H04M 1/82 (2006.01); H04M 1/24 (2006.01);
U.S. Cl.
CPC ...
H04M 1/82 (2013.01); H04M 1/24 (2013.01);
Abstract
A communication apparatus, which captures a line in response to an off-hook operation, includes a first adjustment unit, a detection unit, and a second adjustment unit. The first adjustment unit performs first impedance adjustment according to detection of the off-hook operation. The detection unit detects a line current and a dial tone signal. The second adjustment unit performs second impedance adjustment based on the line current according to a result of detection of the dial tone signal by the detection unit after the first impedance adjustment is performed by the first adjustment unit.