Telephone answering device with improved end signal detection

Details Telephone answering device with improved end signal detection Telephone answering device with improved end signal detection

1990-05-14

1992-03-31

Dwyer, James L.

Telephonic communications

Audio message storage, retrieval, or synthesis

379 79, 379 88, H04M 165

Patent

active

051014262

ABSTRACT:
A telephone answering device (TAD) detects termination signals (Calling Party Control or CPC signals) on a telephone line by determining which signal is most probably a CPC signal, then comparing suspect signals to the determined signal. A series of memory registers store the value of an initial series of suspected CPC signals when the TAD is initially powered up. The stored values are compared with each other to confirm and validate the CPC signal. Upon finding a sufficiently repeated value, that value is stored and from there on used as the value for the CPC signal. Future signals received that are the same as the determined CPC signal terminate TAD operation.

REFERENCES:
patent: 3728488 (1973-04-01), Bonsky et al.
patent: 3859464 (1975-01-01), Seamans
patent: 3935390 (1976-01-01), Winterhalter
patent: 3941934 (1976-03-01), Bonsky
patent: 4309571 (1982-01-01), Chamberlin
patent: 4314103 (1982-02-01), Wilson
patent: 4860340 (1989-08-01), Suzuki et al.
patent: 5022069 (1991-06-01), Chen

Affiliated with

Also associated with

Rating

Telephone answering device with improved end signal detection does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Telephone answering device with improved end signal detection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Telephone answering device with improved end signal detection will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2265025