Telephone illumination circuit

Details Telephone illumination circuit Telephone illumination circuit

H - Electricity

04

M

379/73

H04M 1/74 (2006.01) H04M 1/22 (2006.01)

Patent

CA 1226690

TELEPHONE ILLUMINATION CIRCUIT Abstract of the Disclosure 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.

474281

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