Facsimile apparatus, method of controlling facsimile apparatus, and storage medium
AssigneeCanon Kabushiki Kaisha
InventorShigeo Miura
Life of this patent
Estimating the term…
Abstract
A facsimile apparatus includes a first detection unit, a second detection unit, a third detection unit, and a determination unit. The first detection unit detects a line voltage in an on-hook state. The second detection unit detects a line voltage in an off-hook state. The third detection unit detects a line current in an off-hook state. The determination unit determines 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.
Claims20
A facsimile apparatus comprising:
- a first detection unit configured to detect a line voltage of a line in an on-hook state;
- a second detection unit configured to detect a line voltage of the line in an off-hook state;
- a third detection unit configured to detect a line current of the line in an off-hook state;
- and
- a determination unit configured to determine 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, the determination unit is configured to determine 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, the determination unit is configured to not determine the line impedance.
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.
A non-transitory computer-readable storage medium storing a program to cause a computer to execute 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.
A facsimile apparatus comprising:
- a first detection unit configured to detect a line voltage of a line in an on-hook state;
- a second detection unit configured to detect a line voltage of the line in an off-hook state;
- a third detection unit configured to detect a line current of the line in an off-hook state;
- and
- a determination unit configured to determine 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,
- wherein, in a case where it is determined that the facsimile apparatus is in a voice mode, the determination unit determines the line impedance such that the line impedance is given by a value obtained when a difference between the line voltage detected by the first detection unit and the line voltage detected by the second detection unit is divided by the line current detected by the third detection unit.
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, via the determination unit, 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,
- wherein, in a case where it is determined that the facsimile apparatus is in a voice mode, determining includes determining the line impedance such that the line impedance is given by a value obtained when a difference between the line voltage detected by the first detection unit and the line voltage detected by the second detection unit is divided by the line current detected by the third detection unit.
A non-transitory computer-readable storage medium storing a program to cause a computer to execute 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, via the determination unit, 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,
- wherein, in a case where it is determined that the facsimile apparatus is in a voice mode, determining includes determining the line impedance such that the line impedance is given by a value obtained when a difference between the line voltage detected by the first detection unit and the line voltage detected by the second detection unit is divided by the line current detected by the third detection unit.
Dependencies are inferred from the claim text.