Telephone subscriber system

Details Telephone subscriber system Telephone subscriber system

2005-03-29

2005-03-29

Nguyen, Duc (Department: 2643)

Telephonic communications

Subscriber line or transmission line interface

C379S401000, C379S413000, C379S413010, C379S412000

Reexamination Certificate

active

06873702

ABSTRACT:
A subscriber's telephone system is presented that includes at least one driver circuit connected to Tip and Ring terminals. An additional network is connected between an output of the driver circuit and the Ring terminal. This additional network includes a suitably dimensioned capacitor and a diode limiter connected in parallel with each other to minimize the overall voltage while maintaining a desired battery mean value.

REFERENCES:
patent: 4578541 (1986-03-01), Dodds
patent: 5247573 (1993-09-01), Reichelt
patent: 5323461 (1994-06-01), Rosenbaum et al.
patent: 5706343 (1998-01-01), Saviotti
patent: 5796815 (1998-08-01), Guercio et al.
patent: 6104794 (2000-08-01), Hein et al.

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