Nonlocking key telephone set

Details Nonlocking key telephone set Nonlocking key telephone set

1975-12-05

1977-05-03

Claffy, Kathleen H.

179 84L, H04M 172

Patent

active

040216225

ABSTRACT:
A nonlocking key telephone station is arranged to display full line status information when the station is on-hook and for normally illuminating only the key lamp associated with the line in use at the station when the set is off-hook. To permit a user to discern the full status of the lines terminating at the set when the set is off-hook, circuitry responsive to the depression of one of the keys at the station is provided for displaying full line status information.

REFERENCES:
patent: RE26722 (1969-11-01), Limiero et al.

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