Facsimile machine
AssigneeCanon Kabushiki Kaisha
InventorYosuke Ezumi
Life of this patent
Estimating the term…
Abstract
A facsimile machine, capable of being connected to an external telephone, including a data access apparatus in the form of a semiconductor device, includes a power circuit configured to output a calling signal and supply voltage to the external telephone; a relay configured to switch between a first state in which the external telephone is connected to the power circuit and a second state in which the external telephone is connected to a public line; a detection portion configured to detect a signal level of a signal line between the power circuit and the relay; and a control portion configured to issue an output instruction of the calling signal to the power circuit on the basis of the content of a signal received by the data access apparatus and a detection result obtained by the detection portion in the first state.
Claims14
A facsimile machine, capable of being connected to an external telephone, including a data access apparatus in the form of a semiconductor device that performs signal transmission/reception via a public line, the facsimile machine comprising:
- a power supply unit configured to output a calling signal and supply power to the external telephone;
- a relay configured to switch between a first state in which the external telephone is connected to the power supply unit and a second state in which the external telephone is connected to the public line;
- a detection unit configured to detect a state of a signal line between the power supply unit and the relay;
- and
- a control unit configured to issue an output instruction of the calling signal to the power supply unit on the basis of a signal received by the data access apparatus and a detection result obtained by the detection unit in the first state.
An apparatus comprising:
- a receiving unit configured to receive a signal via a public line;
- a power supply unit configured to output a calling signal and supply power to an external telephone;
- a relay configured to switch between a first state in which the external telephone is connected to the power supply unit and a second state in which the external telephone is connected to the public line;
- a first detection unit configured to detect a state of a signal line between the power supply unit and the relay;
- and
- a control unit configured to issue an output instruction of the calling signal to the power supply unit based on a signal received by the receiving unit and a detection result obtained by the first detection unit in the first state.
A method comprising:
- receiving a signal via a public line;
- outputting a calling signal and supplying power to an external telephone by a power supply unit;
- switching, by a relay, between a first state in which the external telephone is connected to the power supply unit and a second state in which the external telephone is connected to the public line;
- detecting a state of a signal line between the power supply unit and the relay by a first detection unit;
- and
- issuing an output instruction of the calling signal to the power supply unit based on the received signal and a detection result obtained by the first detection unit in the first state.
Dependencies are inferred from the claim text.