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. 29, 2016
Filed:
Dec. 23, 2013
Canon Kabushiki Kaisha, Tokyo, JP;
Naoki Sugawara, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An apparatus which accepts a connection of an external telephone and connects to a telephone line includes a first controller configured to control line impedance via the telephone line, a detecting unit configured to detect a ringing signal received from the telephone line, a determining unit configured to determine whether the external telephone captures a telephone line, and a second controller configured to invalidate the control over line impedance by the first controller in a case where the apparatus is a standby state and validate the suppression of the control over ringer impedance by the first controller in a case where the detecting unit detects the ringing signal and the determining unit determines that the external telephone does not capture a telephone line.