US5454024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellular digital packet data (CDPD) network transmission system incorporating cellular link integrity monitoring
Assignee: GELLMAN TOBI KAY TRUSTEE OF LEBOWITZ MAYER MICHAEL
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Filing: 1994-02-15
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Granted: 1995-09-26
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Expires: 2014-02-15
Abstract
Abstract A system for transmitting data between a subscriber site and at least one monitoring station, comprising a sensor circuit for generating data responsive to an event at the subscriber site, a first transmission circuit responsive to said sensor circuit and being operable to transmit data in packet form from the subscriber site to the monitoring station over a cellular digital packet data telecommunications network, a second transmission circuit responsive to said sensor circuit and being operable to transmit data from the subscriber site to the monitoring station over a second telecommunications network. A fault detect circuit is coupled to the first transmission circuit for continuously monitoring the operation of the first transmission circuit and the integrity of the cellular digital packet data telecommunications network. A control switch is coupled to the fault detect circuit and controlled thereby for automatically creating a signal path between the sensor circuit and the second transmission circuit.
Inventors
- 👤 Mayer M. Lebowitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:26
CPC Classifications
H; H04; H04W; H04W24/00; H04W24/04; G; G08; G08B; G08B29/00; G08B29/16; H04M; H04M11/00; H04M11/002; H04M11/04; H04W76/00; H04W76/20; H04Q; H04Q2213/00; H04Q2213/1301; H04Q2213/1305; H04Q2213/13092; H04Q2213/13093; H04Q2213/13098; H04Q2213/13103; H04Q2213/13106; H04Q2213/13166; H04Q2213/13167; H04Q2213/13174
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
110 words
A system for transmitting data between a subscriber site, having a plurality of sensors associated therewith, and at least one monitoring station using first and second transmission circuits connected to first and second telecommunications networks, the first telecommunications network providing cellular digital packet data (CDPD) transmission, comprising: fault detect circuit means coupled to the first transmission means for continuously monitoring the operation of the first transmission circuit and the integrity of the first telecommunications network; and control means coupled to the fault detect circuit means and controlled thereby for automatically creating a signal path between the sensors and the second transmission circuit upon loss of integrity of the CDPD network.
Claim 2
Independent Claim
110 words
A system for transmitting data between a subscriber site, having a plurality of sensors associated therewith, and at least one monitoring station using first and second transmission circuits connected to first and second telecommunications networks, the first telecommunications network providing cellular digital packet data (CDPD) transmission, comprising: fault detect circuit means coupled to the first transmission means for continuously monitoring the operation of the first transmission circuit and the integrity of the first telecommunications network; and control means coupled to the fault detect circuit means and controlled thereby for automatically creating a signal path between the sensors and the second transmission circuit upon loss of integrity of the CDPD network.
Claim 3
Independent Claim
152 words
A system for transmitting data between a subscriber site and at least one monitoring station, comprising: sensor circuit means for generating data responsive to an event at the subscriber site; first transmission means responsive to said sensor circuit means and being operable to transmit data in packet form from the subscriber site to the monitoring station over a cellular digital packet data telecommunications network; second transmission means responsive to said sensor circuit means and being operable to transmit data from the subscriber site to the monitoring station over a second telecommunications network; fault detect circuit means coupled to said first transmission means for continuously monitoring the operation of the first transmission means and the integrity of the cellular digital packet data telecommunications network; and control means coupled to the fault detect circuit means and controlled thereby for automatically creating a signal path between the sensor circuit means and the second transmission means.
Claim 4
Independent Claim
152 words
A system for transmitting data between a subscriber site and at least one monitoring station, comprising: sensor circuit means for generating data responsive to an event at the subscriber site; first transmission means responsive to said sensor circuit means and being operable to transmit data in packet form from the subscriber site to the monitoring station over a cellular digital packet data telecommunications network; second transmission means responsive to said sensor circuit means and being operable to transmit data from the subscriber site to the monitoring station over a second telecommunications network; fault detect circuit means coupled to said first transmission means for continuously monitoring the operation of the first transmission means and the integrity of the cellular digital packet data telecommunications network; and control means coupled to the fault detect circuit means and controlled thereby for automatically creating a signal path between the sensor circuit means and the second transmission means.
Claim 5
Dependent Claim
35 words
The system as described in claim 2 wherein the signal path between the sensor circuit means and the second transmission means is created upon loss of integrity of the cellular digital packet data telecommunications network.
Claim 6
Dependent Claim
33 words
The system as described in claim 2 wherein the signal path between the sensor circuit means and the second transmission means is created upon detection of a fault in the first transmission means.
Claim 7
Dependent Claim
20 words
The system as described in claim 2 wherein the first transmission means includes a cellular digital packet data (CDPD) modem.
Claim 8
Dependent Claim
16 words
The system as described in claim 2 wherein the second telecommunications network is a land line.
References Cited (Backward Citations)
US4577182A
Cited
US4697281A
Cited
US4718079A
Cited
US4742336A
Cited
US4856047A
Cited
US4868859A
Cited
US4887290A
Cited
US4993059A
Cited
US4972455A
Cited
US5125021A
Cited
US5134644A
Cited
US5128979A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-09-25 | 1999-03-27 | 1999-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-09-25 | 2003-03-27 | 2003-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-09-25 | 2007-03-27 | 2007-09-26 | $7700.00 | Window Closed / Lapsed |