Central office interface circuit

Details Central office interface circuit Central office interface circuit

1980-05-05

1983-01-18

Popek, Joseph A.

H04M 100

Patent

active

043693377

ABSTRACT:
An interface circuit for interconnection between a central office line and a telephone apparatus (e.g. telephone set, automatic telephone answering machine, etc.) is disclosed. The interface circuit includes a rectifier which allows the interface circuit to be connected across the central office line, in parallel with other interface circuits, without the use of isolation switches.

REFERENCES:
patent: 4132863 (1979-01-01), Smith
patent: 4197425 (1980-04-01), Secrett et al.
patent: 4214130 (1980-07-01), Questad
patent: 4232293 (1980-11-01), Harris

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