1984-02-27
1986-01-14
Dwyer, James L.
179 90L, H04M 122
Patent
active
045647291
ABSTRACT:
A telephone illumination circuit includes a light emitting means and current control means connected in series with the light emitting means across the telephone line. The current control means is adapted to maintain high AC impedance over the entire range of AC and DC operating voltage to protect the quality of AC voice signals on the telephone line.
REFERENCES:
patent: 3784760 (1974-01-01), Rickert
Dwyer James L.
General Electric Company
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