Facsimile apparatus

Details Facsimile apparatus Facsimile apparatus

2004-08-04

2009-02-10

Singh, Ramnandan (Department: 2614)

Telephonic communications

Subscriber line or transmission line interface

Reexamination Certificate

active

07489776

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.

REFERENCES:
patent: 5347572 (1994-09-01), Avni
patent: 5500895 (1996-03-01), Yurgelites
patent: 7050577 (2006-05-01), Enriquez et al.
patent: 2003/0048483 (2003-03-01), Okabe
patent: A 8-251279 (1996-09-01), None
patent: A 2002-171360 (2002-06-01), None
patent: A 2003-51926 (2003-02-01), None

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