Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Tomohiro Ito0
Date of Patent
February 10, 2009
0Patent Application Number
109104200
Date Filed
August 4, 2004
0Patent Primary Examiner
Patent abstract
A facsimile apparatus, to which an external telephone enables to be connected through a line, has a line I/F section that transfers and receives signal through a network, a voltage detection section that is provided in a semiconductor DAA and detects a line voltage of the line, an adjustment section that adjusts a line voltage during establishment of a connection through the line so as to be within a predetermined voltage, and an external telephone monitor section that acquires a value of the line voltage detected by the voltage detection section at regular time intervals and monitors a use state of the external telephone based on the acquired values of the line voltage.
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