Communication apparatus and method for determining connection
AssigneeRicoh Company, Ltd.
InventorKenichi Watanabe
Life of this patent
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Abstract
A communication apparatus includes: a controller that controls processing to perform facsimile; a first controlling unit that controls a voltage between lines that perform facsimile in accordance with control by the controller; a detector that detects a voltage change between the lines; and second controlling unit that discharges electric charge accumulated in between the lines so as to enable the detector to detect a voltage change between the lines when the first controlling unit is turned off. The controller determining whether connection to the lines is made based on the voltage change detected by detector.
Claims10
A communication apparatus, comprising:
- processing circuitry that controls processing to perform facsimile communication;
- line controller processing circuitry that controls a voltage between lines for the facsimile communication in accordance with control by the processing circuitry;
- a detector that detects a ringing signal on the lines using a voltage change between the lines, and outputs a ring detection signal to the processing circuitry when the ringing signal on the lines is detected;
- and
- line disconnection processing circuitry that discharges electric charge accumulated in between the lines so as to enable the detector to detect a voltage change between the lines when the line controller processing circuitry is turned off,
- wherein the processing circuitry determines whether a connection to the lines is to be made based on the ringing detection signal output by the detector.
A method for determining connection, comprising:
- discharging electric charge accumulated in between lines which communicate facsimile information so as to enable a detector to detect a voltage change between the lines, when line controller processing circuitry that controls a voltage between the lines is turned off;
- detecting a voltage change between the lines when the line controller processing circuitry is turned off, and outputting a ringing detection signal;
- and
- determining whether connection to the lines is to be made based on the ringing detection signal.
A method for determining connection, comprising:
- discharging electric charge accumulated between lines which communicate facsimile information, when there is no communication over the lines;
- detecting a voltage change between the lines when the electric charge accumulated between the lines is discharged, and outputting a ringing detection signal;
- and
- determining whether connection to the lines is to be made based on the ringing detection signal.
Dependencies are inferred from the claim text.