Communication connection apparatus for use in direct connection

Details Communication connection apparatus for use in direct connection Communication connection apparatus for use in direct connection

1996-05-01

1998-05-12

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Facsimile system interface

379100, 358443, H04M 1100, H04M 140, H04M 132, G06F 1340

Patent

active

057514429

ABSTRACT:
A communication connection apparatus connected between a facsimile modem apparatus and a facsimile apparatus is provided for connecting the facsimile modem apparatus with the facsimile apparatus through a pair of transmission lines so as to execute communication between the facsimile modem apparatus and the facsimile apparatus. Further, a DC power source applies to a pair of transmission lines through a resistor, a predetermined DC voltage for transmitting an analog facsimile signal transmitted from either one of the facsimile modem apparatus and the facsimile apparatus so as to superimpose the analog facsimile signal on the DC voltage through a pair of transmission lines. In the communication connection apparatus, there is preferably further provided a diode connected between the DC power source and the resistor in a direction of a polarity of the diode such that the predetermined DC voltage is applied to a pair of transmission lines. A facsimile modem apparatus may include the communication connection apparatus.

REFERENCES:
patent: 4609863 (1986-09-01), Asai et al.
patent: 4964154 (1990-10-01), Shimotono
patent: 4991200 (1991-02-01), Lin
patent: 5166977 (1992-11-01), Ross
patent: 5530558 (1996-06-01), Nachman

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