Digitally controlled ringer signal generation

Details Digitally controlled ringer signal generation Digitally controlled ringer signal generation

1992-06-05

1994-06-21

Dwyer, James L.

Telephonic communications

Supervisory or control line signaling

Signal reception at substation

379373, 379418, 3403845, H04M 126, H04M 154, H04M 302, G08B 300

Patent

active

053234561

ABSTRACT:
A method and apparatus, of producing an alarm or ringing signal by providing a first pulse signal having a predetermined pulse width to define an alarm or ringing signal amplitude, and modulating the pulse signal with a second pulse signal having a pulse rate at least an order lower than the frequency of the first pulse signal to define the alarm or ringing signal frequency, averaging the modulated first pulse signal in a loudspeaker voice coil and reproducing the result in the loudspeaker to provide the alarm or ringing signal.

REFERENCES:
patent: 4491691 (1985-01-01), Embree et al.
patent: 4508937 (1985-04-01), Burger et al.
patent: 4567333 (1986-01-01), Embree et al.
patent: 4608686 (1986-08-01), Barsellotti
patent: 4626799 (1986-12-01), Matievic
patent: 4631361 (1986-12-01), Miller
patent: 5001748 (1991-03-01), Burns et al.
patent: 5200994 (1993-04-01), Sasano et al.

Affiliated with

Also associated with

Rating

Digitally controlled ringer signal generation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digitally controlled ringer signal generation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digitally controlled ringer signal generation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2226654