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. 04, 2018
Filed:
Jun. 17, 2016
Applicant:
Oki Data Corporation, Tokyo, JP;
Inventor:
Kimiaki Ogawa, Tokyo, JP;
Assignee:
OKI DATA CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04M 1/76 (2006.01); H04M 3/28 (2006.01); H04M 7/00 (2006.01); H04M 11/06 (2006.01); H04B 3/493 (2015.01); H04M 19/02 (2006.01); H04N 1/00 (2006.01);
U.S. Cl.
CPC ...
H04M 1/76 (2013.01); H04B 3/493 (2015.01); H04M 3/28 (2013.01); H04M 7/0096 (2013.01); H04M 11/066 (2013.01); H04M 19/02 (2013.01); H04N 1/00206 (2013.01); H04N 1/00281 (2013.01); H04N 2201/0093 (2013.01);
Abstract
A communication device includes: a signal generator configured to generate a first signal and supply the first signal to a telephone line; a terminator having a variable terminal impedance as seen from the telephone line; a detector configured to detect a difference between the terminal impedance and a line impedance of the telephone line; and a controller configured to determine the terminal impedance so that the difference is reduced.