High performance telephone instrument with combination pulse and

Details High performance telephone instrument with combination pulse and High performance telephone instrument with combination pulse and

1985-09-23

1987-06-23

Rubinson, Gene Z.

Telephonic communications

Substation or terminal circuitry

Impedance matching or line equalizing

379387, H04M 126

Patent

active

046759026

ABSTRACT:
An electronic telephone instrument circuit capable of dialing (address signaling) in either pulse or tone mode. The circuitry permits the placement of a call through a rotary dial only system into a second network that is of a tone only nature. The included circuitry has very high return loss and relatively high level of tone capability and is designed to function with a variety of types of dialer integrated circuits. The present circuitry provides part of its DC current supervision while in the voice mode through the included tone amplifiers circuit thereby minimizing components and reducing current load through the voice network.

REFERENCES:
patent: 4413159 (1983-11-01), Huizinga
patent: 4527016 (1985-07-01), Sublette
patent: 4550226 (1985-10-01), Teater
EDN, "Single-Chip Repertory Dialer Affords Dual-Dial-Mode Telephone", Mar. 22, 1984, pp. 191-198.
Telecommunications, "Semiconductor Technology Impacts Station Apparatus", Aug. 1980, pp. 62-64.
Ericsson Review, "All Telephone Functions in One Chip PBL3780", review 3, 1985, pp. 138-143.

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