Line control apparatus, line control method, and computer-readable storage medium
AssigneeCanon Kabushiki Kaisha
InventorMasahiro Kurahashi
Life of this patent
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Abstract
A line control apparatus having a first interface for connecting to a telephone line, a second interface for connecting to a facsimile apparatus, and a third interface for connecting to a telephone, includes: a first detecting unit that detects a calling signal transmitted from the telephone line and a second detecting unit configured to detect a signal from the telephone line, such signal having a voltage lower than a voltage that the first detecting unit can detect. In accordance with the second detecting unit having detected a signal from the telephone line, the control unit switches from a state wherein the first interface and the third interface are connected to a state of not being connected.
Claims19
A line control apparatus having a first interface for connecting to a telephone line, a second interface for connecting to a facsimile apparatus, and a third interface for connecting to a telephone, the line control apparatus comprising:
- a first detecting unit configured to detect a calling signal transmitted from the telephone line;
- a first switching unit configured to switch a connection state between the first interface and the third interface;
- a second detecting unit configured to detect a signal from the telephone line, such signal having a voltage lower than a voltage that the first detecting unit can detect;
- and
- a control unit configured to control the first switching unit so as to switch from a state wherein the first interface and the third interface are connected to a state of not being connected, in accordance with the second detecting unit having detected the signal from the telephone line.
A line control method for a line control apparatus having a first interface for connecting to a telephone line, a second interface for connecting to a facsimile apparatus, and a third interface for connecting to a telephone, the method comprising:
- a first detecting process arranged to detect a calling signal transmitted from the telephone line;
- a first switching process arranged to switch a connection state between the first interface and the third interface;
- a second detecting process arranged to detect a signal from the telephone line, such signal having a voltage lower than a voltage that can be detected with the first detecting process;
- and
- a control process arranged to control the first switching process so as to switch from a state wherein the first interface and the third interface are connected to a state of not being connected, in accordance with the signal from the telephone line having been detected by the second detecting process.
Dependencies are inferred from the claim text.