2-wire/3-wire converting apparatus

Details 2-wire/3-wire converting apparatus 2-wire/3-wire converting apparatus

1991-09-09

1993-10-05

Kuntz, Curtis

Telephonic communications

Subscriber line or transmission line interface

379402, 379413, 379345, H04M 100, H04M 300

Patent

active

052512576

ABSTRACT:
A 2-wire/3-wire converting apparatus having two transmission/reception terminals to be connected to a 2-wire circuit, a transmission terminal, a reception terminal and a common terminal to be connected to a 3-wire circuit. The converting apparatus includes an electric circuit for applying between the two transmission/reception terminals a voltage proportional to a voltage of a reception signal conveyed on the 3-wire circuit and appearing between the reception terminal and the common terminal and for applying a voltage between the transmission terminal and the common terminal a voltage proportional to a voltage obtained by subtracting the voltage proportional to the voltage of the reception signal from a voltage appearing between the two transmission/reception terminals.

REFERENCES:
patent: 4554416 (1985-11-01), Pacini et al.
patent: 4600811 (1986-07-01), Hayashi et al.
patent: 4809297 (1989-02-01), Polansky
patent: 4972457 (1990-11-01), O'Sullivan

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