US 9,813,583 B2
Facsimile apparatus, method of controlling facsimile apparatus, and storage medium
Shigeo Miura, Tokyo (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jun. 3, 2016, as Appl. No. 15/173,401.
Claims priority of application No. 2015-116055 (JP), filed on Jun. 8, 2015.
Prior Publication US 2016/0360064 A1, Dec. 8, 2016
Int. Cl. H04M 11/00 (2006.01); H04N 1/327 (2006.01); H04N 1/00 (2006.01)
CPC H04N 1/32728 (2013.01) [H04N 1/00323 (2013.01); H04N 1/3273 (2013.01); H04N 2201/0093 (2013.01)] 20 Claims
OG exemplary drawing
 
11. A method of controlling a facsimile apparatus having a first detection unit, a second detection unit, a third detection unit, and a determination unit, the method comprising:
detecting, via the first detection unit, a line voltage of a line in an on-hook state;
detecting, via the second detection unit, a line voltage of the line in an off-hook state;
detecting, via the third detection unit, a line current of the line in an off-hook state; and
determining, using the determination unit, whether the facsimile apparatus is in a voice mode,
wherein, in a case where it is determined that the facsimile apparatus is in a voice mode, determining includes determining a line impedance based on the line voltage detected by the first detection unit, the line voltage detected by the second detection unit, and the line current detected by the third detection unit, and
wherein, in a case where it is determined that the facsimile apparatus is not in the voice mode, determining includes not determining the line impedance.