Key telephone station set circuit

Details Key telephone station set circuit Key telephone station set circuit

1976-10-27

1977-09-06

Claffy, Kathleen H.

179 84L, 179 84T, H04Q 518

Patent

active

040469727

ABSTRACT:
An electronic key telephone station set includes a plurality of nonlocking line selection buttons. Adjacent each button is a pair of light emitting diode lamps, one for indicating which line selection button has been actuated and one for indicating which ones of other lines having an appearance on the station set are in use. Digital data coupled to and from the station set control the activation of the indicating lamps as well as the type of alerting signal generated to indicate an incoming call. Numerous other features may be advantageously implemented under data stream control.

REFERENCES:
patent: 3146314 (1964-08-01), Boehly et al.
patent: 3385935 (1968-05-01), Anderson et al.
patent: 3519757 (1970-07-01), Anderson et al.
patent: 3763326 (1973-10-01), Murtu et al.
patent: 3843845 (1974-10-01), Ridley
patent: 3906168 (1975-09-01), McEdwen
patent: 3935396 (1976-01-01), Barsellotti et al.
patent: 3946146 (1976-03-01), Brown et al.
patent: 3973085 (1976-08-01), Shiff
patent: 3991282 (1976-11-01), Feil

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