Method and apparatus for selectively generating control signals

Details Method and apparatus for selectively generating control signals Method and apparatus for selectively generating control signals

1994-07-08

1996-02-06

Hofsass, Jeffery

Telephonic communications

Centralized switching system

With generating of call associated substation signal

379361, 379279, H04M 153

Patent

active

054902142

ABSTRACT:
An improvement to a telephone system (10) having a first signal generator (21) which outputs a control signal only when it receives a certain request signal generated by the telephone system's client telephone (12). The invention contemplates a method and apparatus to generate a desired control signal when a request signal incapable of activating the first signal generator is produced by a client telephone (12).

REFERENCES:
patent: 4107477 (1978-08-01), Morrison
patent: 4771450 (1988-09-01), Castro et al.
patent: 4922527 (1990-05-01), Nonami
patent: 4974253 (1990-11-01), Hashimoto
patent: 5023903 (1991-06-01), Bowen
patent: 5228079 (1993-07-01), Brav

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