Telephonic communications – Subscriber line or transmission line interface – Network interface device
Patent
1989-08-09
1992-11-03
Dwyer, James L.
Telephonic communications
Subscriber line or transmission line interface
Network interface device
379387, H04M 100
Patent
active
051611848
ABSTRACT:
A programmable telephone powered by a telephone line, and responsive to ringing signals for providing an automatic answer. A microprocessor in the telephone is powered by periodic signals during ringing intervals for executing instructions to count the number of ring cycles, and is placed in a sleep mode if such number does not exceed a predefined threshold. When the threshold number of rings occurs, the microprocessor places the telephone in a simulated off-hook condition for allowing programming of the memory thereof. The memory of the microprocessor is an EEPROM having a file allocation table with addresses pointing to an input dialing pattern table, an area code/exchange code table and to an output dialing pattern table. Multiple levels of user and software security codes are employed to provide a high degree of security to the programming of the telephone.
REFERENCES:
patent: 4488006 (1984-12-01), Essig et al.
patent: 4636587 (1987-01-01), Zoerner
patent: 4691344 (1987-09-01), Brown et al.
patent: 4777647 (1988-10-01), Smith et al.
patent: 4947422 (1990-08-01), Smith et al.
Burnett Steven W.
Smith Benjamin A.
Augustus Jhancy
Digital Telecommunications Systems, Inc.
Dwyer James L.
LandOfFree
Ring-back powered telephone with nonvolatile memory structure does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ring-back powered telephone with nonvolatile memory structure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ring-back powered telephone with nonvolatile memory structure will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2056291