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US 6,674,550 B1Granted
Facsimile apparatus
AssigneeCanon Kabushiki Kaisha
InventorsYosuke Ezumi, Toshio Kenmochi, Hisashi Toyoda, Takeshi Tsukamoto
Life of this patent
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Abstract
In a facsimile apparatus which communicates data through a communication line, a transmission level can be changed manually or in accordance with a type of the communication line or a type of an external unit as discriminated.
Claims24
A facsimile apparatus, comprising:
- an interface for connection to at least one external communication unit, said interface comprising a jack and a plug to be connected to the jack, and said interface being adapted to output signals corresponding to an external communication unit connected thereto;
- and
- a controller for discriminating three types of external communication units connectable to said interface, based on the signals outputted from said interface,
- wherein said controller discriminates the three types of external communication units based on (1) a case where the plug is not connected to the jack, in which case said interface outputs a first output signal that is LOW;
- (2) a case where the plug is connected to the jack, in which case the first output signal is HIGH, and a second output signal outputted from said interface is HIGH;
- and (3) a case where the plug is connected to the jack, in which case the first output signal is HIGH, and the second output signal is LOW, respectively.
3 more elements
A facsimile apparatus, comprising:
- an interface for connecting to at least one external communication unit, said interface comprising a jack and a plug to be connected to the jack, and said interface being adapted to output signals corresponding to an external communication unit connected thereto;
- and
- a controller for discriminating three types of external communication units connectable to said interface, based on the signals outputted from said interface,
- wherein said controller discriminates the three types of external communication units based on a mechanical switch member and a state of an electrical connection to the external communication unit, such that (1) in a case where the plug is not connected to the jack, said interface outputs a first output signal that is LOW;
- (2) in a case where the plug is connected to the jack, the first output signal is HIGH, and a second output signal outputted from said interface is HIGH;
- and (3) in a case where the plug is connected to the jack, the first output signal is HIGH, and the second output signal is LOW, respectively.
3 more elements
A method of operating a facsimile apparatus, comprising the steps of:
- connecting an interface to at least one external communication unit, the interface comprising a jack and a plug to be connected to the jack, and the interface being adapted to output signals corresponding to an external communication unit connected thereto;
- and
- discriminating, using a control device, three types of external communication units connectable to the interface, based on the signals outputted from the interface,
- wherein the control device discriminates the three types of external communication units based on (1) a case where the plug is not connected to the jack, in which case the interface outputs a first signal that is LOW;
- (2) a case where the plug is connected to the jack, in which case the first output signal is HIGH, and a second output signal outputted from the interface is HIGH;
- and (3) a case where the plug is connected to the jack, in which case the first output signal is HIGH, and the second output signal is LOW, respectively.
3 more elements
A method of operating a facsimile apparatus, comprising the steps of:
- connecting an interface to at least one external communication unit, the interface comprising a jack and a plug to be connected to the jack, and the interface being adapted to output signals corresponding to an external communication unit connected thereto;
- and
- discriminating, using a control device, three types of external communication units connectable to the interface, based on signals from of the interface,
- wherein the control device discriminates the three types of external communication units based on a mechanical switch member and a state of an electrical connection to the external communication unit, such that (1) in a case where the plug is not connected to the jack, the interface outputs a first output signal that is LOW;
- (2) in a case where the plug is connected to the jack, the first output signal is HIGH, and a second output signal outputted from the interface is HIGH;
- and (3) in a case where the plug is connected to the jack, the first output signal is HIGH, and the second output signal is LOW, respectively.
3 more elements
Dependencies are inferred from the claim text.