Line use indicator in a telephone set

Details Line use indicator in a telephone set Line use indicator in a telephone set

H - Electricity

04

M

379/33, 379/83

H04M 1/00 (2006.01)

Patent

CA 1257420

LINE USE INDICATOR IN A TELEPHONE SET Abstract of the Disclosure A line use indicator in a telephone set, to indicate a telephone line is in use when a plurality of telephone sets are paralleled on the line, comprises a light emitting device switched by a transistor, the transistor controlled by a VMOS FET. The transistor may switch a separate power source or a self-contained power source from the telephone line.

531774

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