Data transmission apparatus for use with a security system havin

Telephonic communications – Emergency or alarm communications – Responsive to sensed nonsystem condition

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

379355, 379 27, 379 33, 379 50, H04M 1104

Patent

active

056848587

ABSTRACT:
A data transmission apparatus includes a telephone line interface, a telephone line fault detector, DTMF and pulse dialing detectors, data pulse and tone detectors, a tone generator, a microprocessor controller, and a radio transmitter. The line fault detector monitors the phone line for a fault. The DTMF and pulse dialing detectors detect the telephone number dialed by the dialer. The microprocessor directs the radio transmitter to transmit a message indicting a telephone line failure if a line failure is detected. When a line failure is detected, the microprocessor causes the telephone line interface to disconnect the telephone dialer from the telephone line and to "capture" the dialer by coupling it to the data pulse and tone detectors and the tone generator. The data pulse and tone detectors and the tone generator emulate telephone line communication between the dialer and a monitoring station. The data received from the dialer is transmitted by the radio transmitter as an RF data burst. In addition, if the second programmed number in the dialer is one which can be recognized by the apparatus of the invention, the microprocessor will capture the dialer upon detection of the second programmed number having been dialed by the dialer. Communication with the dialer is then effected as described above.

REFERENCES:
patent: 3914692 (1975-10-01), Seaborn, Jr.
patent: 3925763 (1975-12-01), Wadhwani et al.
patent: 4228424 (1980-10-01), Le Nay et al.
patent: 4465904 (1984-08-01), Gottsegen et al.
patent: 4521645 (1985-06-01), Carroll
patent: 4577182 (1986-03-01), Millsap et al.
patent: 4724425 (1988-02-01), Gerhart et al.
patent: 4868859 (1989-09-01), Sheffer
patent: 4887290 (1989-12-01), Dop et al.
patent: 4905273 (1990-02-01), Gordon et al.
patent: 4993059 (1991-02-01), Smith et al.
patent: 5027383 (1991-06-01), Sheffer
patent: 5131019 (1992-07-01), Sheffer et al.
patent: 5134644 (1992-07-01), Garton et al.
patent: 5517547 (1996-05-01), Ladha et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Data transmission apparatus for use with a security system havin does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Data transmission apparatus for use with a security system havin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data transmission apparatus for use with a security system havin will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1839597

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.