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:
Jan. 31, 2017
Filed:
Dec. 21, 2015
Canon Kabushiki Kaisha, Tokyo, JP;
Daiki Kadomatsu, Kawasaki, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A communication apparatus includes: a first determination unit configured to determine whether a first voltage identified under conditions where a telephone connection terminal is connected to a modem unit is greater than or equal to a first threshold value; a second determination unit configured to, if the first determination unit determines that the first voltage is greater than or equal to the first threshold value, determine whether a second voltage identified under conditions where the telephone connection terminal is disconnected from the modem unit tends to decrease; and a third determination unit configured to determine connection states of the telephone connection terminal and a line connection terminal based on determination results of the first determination unit and the second determination unit. If the second determination unit determines that the identified second voltage has decreased more than once, the third determination unit determines that a wrong connection has been made.