1977-05-11
1978-08-15
Claffy, Kathleen H.
H04M 126
Patent
active
041074955
ABSTRACT:
Disclosed is an apparatus for telephone signaling comprising a burst detector connected across the line emanating from the central office and an amplifier, similarly connected, which is enabled with the output signal of the burst detector. In operation, the central office applies a succession of signal bursts of predetermined frequency and duration, followed by the desired alerting signal. When a signal burst is detected in the burst detector, the amplifier is enabled for a predetermined period of time following the signal burst. During the enabled time, the ringing signal applied by the central office is appropriately amplified to cause an alerting transducer to produce the desired sound.
REFERENCES:
patent: 3072894 (1963-01-01), Chapin
patent: 3508012 (1970-04-01), Golembeski
patent: 3808379 (1974-04-01), Lind
Hawley George Thomas
Young Lawrence Henry
Bell Telephone Laboratories Incorporated
Brendzel Henry T.
Claffy Kathleen H.
Kearns Joseph P.
Popek Joseph A.
LandOfFree
Electronic tone ringer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electronic tone ringer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic tone ringer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1437404