Crescendo telephone ringer

Details Crescendo telephone ringer Crescendo telephone ringer

2007-07-31

2007-07-31

Harold, Jefferey (Department: 2614)

Telephonic communications

Supervisory or control line signaling

Signal reception at substation

C379S373010, C379S413010, C379S418000

Reexamination Certificate

active

10631914

ABSTRACT:
Crescendo telephone ringers and methods of providing a crescendo telephone ring signal. The crescendo telephone ringer provides a gradual increase in audible ringing volume as a sequence of incoming electrical ring signals is detected. According to one embodiment, upon receipt of an incoming call, a first audible ring signal corresponding to a first detected electrical ring signal is set to a minimum volume. Subsequent audible ring signals corresponding to subsequent detected electrical ring signals are set to increasing volume levels, and finally to a maximum ringer volume.

REFERENCES:
patent: 5870684 (1999-02-01), Hoashi et al.
patent: 6084959 (2000-07-01), Yun
patent: 6115469 (2000-09-01), Dalal et al.
patent: 6661890 (2003-12-01), Ellis

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