US5684858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data transmission apparatus for use with a security system having a telephone dialer
Assignee: CRN Telemetry Devices Inc
•
Filing: 1995-08-28
•
Granted: 1997-11-04
•
Expires: 2015-08-28
Abstract
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.
Inventors
- 👤 Wade A. Hartmann
- 👤 Herbert B. Krieger
- 👤 Anthony E. Saunders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:14
CPC Classifications
H; H04; H04M; H04M11/00; H04M11/04
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
224 words
A data transmission apparatus for use with a telephone dialer coupled to a telephone line, comprising: a) a telephone dialer communications means for communicating with the telephone dialer and for emulating a bidirectional telephone line connection with the telephone dialer such that when communicating with the telephone dialer, the telephone dialer behaves as if it were communicating bidirectionally via a telephone line connection. b) a telephone line interface means coupled to the telephone line and the dialer for selectively uncoupling the dialer from the telephone line and coupling the dialer to said telephone dialer communications means; c) a telephone line faults detector means coupled to the telephone line for detecting a fault in the telephone line and coupled to said telephone line interface means; d) a radio frequency transmitter coupled to said telephone dialer communications means for transmitting data received from the telephone dialer by said telephone dialer communications means and coupled to said telephone line fault detector means for transmitting a message indicative of a fault in the telephone line, wherein when said telephone line fault detector means detects a fault in the telephone line, said radio frequency transmitter transmits said message indicative of a fault in the telephone line and said telephone line interface means uncouples the dialer from the telephone line and couples the dialer to said telephone dialer communications means.
Claim 2
Dependent Claim
224 words
A data transmission apparatus for use with a telephone dialer coupled to a telephone line, comprising: a) a telephone dialer communications means for communicating with the telephone dialer and for emulating a bidirectional telephone line connection with the telephone dialer such that when communicating with the telephone dialer, the telephone dialer behaves as if it were communicating bidirectionally via a telephone line connection. b) a telephone line interface means coupled to the telephone line and the dialer for selectively uncoupling the dialer from the telephone line and coupling the dialer to said telephone dialer communications means; c) a telephone line faults detector means coupled to the telephone line for detecting a fault in the telephone line and coupled to said telephone line interface means; d) a radio frequency transmitter coupled to said telephone dialer communications means for transmitting data received from the telephone dialer by said telephone dialer communications means and coupled to said telephone line fault detector means for transmitting a message indicative of a fault in the telephone line, wherein when said telephone line fault detector means detects a fault in the telephone line, said radio frequency transmitter transmits said message indicative of a fault in the telephone line and said telephone line interface means uncouples the dialer from the telephone line and couples the dialer to said telephone dialer communications means.
Claim 3
Dependent Claim
20 words
An apparatus according to claim 1, wherein: said telephone dialer communications means includes a tone detector and a tone generator.
Claim 4
Dependent Claim
23 words
An apparatus according to claim 2, wherein: said telephone dialer communications means further includes means for generating a 48 volt telephone line emulation.
Claim 5
Dependent Claim
17 words
An apparatus according to claim 1, wherein: said telephone line interface means includes a DPDT relay switch.
Claim 6
Dependent Claim
24 words
An apparatus according to claim 1, wherein: said telephone line fault detector means includes means for detecting one of on-hook voltage and off-hook current.
Claim 7
Dependent Claim
31 words
An apparatus according to claim 5, wherein: said telephone line fault detector means includes means for determining whether a fault in the telephone line has existed for at least sixty seconds.
Claim 8
Dependent Claim
39 words
An apparatus according to claim 1, further comprising: e) a plurality of sensor inputs coupled to said radio frequency transmitter, wherein said radio frequency transmitter transmits a message in response to a signal from one of said sensor inputs.
Claim 9
Dependent Claim
25 words
An apparatus according to claim 1, further comprising: e) means for causing said radio frequency transmitter to repeatedly transmit data received from the telephone dialer.
Claim 10
Dependent Claim
29 words
An apparatus according to claim 1, further comprising: e) means for causing said radio frequency transmitter to repeatedly transmit said message indicative of a fault in the telephone line.
Claim 11
Dependent Claim
200 words
A data transmission apparatus for use with a telephone dialer coupled to a telephone line, comprising: a) a telephone dialer communication means for communicating with the telephone dialer and for emulating a bidirectional telephone line connection with the telephone dialer such that when communicating with the telephone dialer, the telephone dialer behaves as if it were communicating bidirectionally via a telephone line connection; b) a telephone line interface means coupled to the telephone line and the dialer for selectively uncoupling the dialer from the telephone line and coupling the dialer to said telephone dialer communications means; c) a telephone number detector means coupled to the telephone dialer for detecting a selected telephone number dialed by the dialer and coupled to said telephone line interface means; d) a radio frequency transmitter coupled to said telephone dialer communication means for transmitting data received from the telephone dialer by said telephone dialer communications means, wherein when said telephone number detectors means detects the dialer dialing said selected telephone number, said telephone line interface means uncouples the dialer from the telephone line and couples the dialer to said telephone dialer communications means, and data from the dialer is transmitted by said radio frequency transmitter.
Claim 12
Dependent Claim
200 words
A data transmission apparatus for use with a telephone dialer coupled to a telephone line, comprising: a) a telephone dialer communication means for communicating with the telephone dialer and for emulating a bidirectional telephone line connection with the telephone dialer such that when communicating with the telephone dialer, the telephone dialer behaves as if it were communicating bidirectionally via a telephone line connection; b) a telephone line interface means coupled to the telephone line and the dialer for selectively uncoupling the dialer from the telephone line and coupling the dialer to said telephone dialer communications means; c) a telephone number detector means coupled to the telephone dialer for detecting a selected telephone number dialed by the dialer and coupled to said telephone line interface means; d) a radio frequency transmitter coupled to said telephone dialer communication means for transmitting data received from the telephone dialer by said telephone dialer communications means, wherein when said telephone number detectors means detects the dialer dialing said selected telephone number, said telephone line interface means uncouples the dialer from the telephone line and couples the dialer to said telephone dialer communications means, and data from the dialer is transmitted by said radio frequency transmitter.
Claim 13
Dependent Claim
20 words
An apparatus according to claim 10, wherein: said telephone dialer communications means includes a tone detector and a tone generator.
Claim 14
Dependent Claim
23 words
An apparatus according to claim 11, wherein: said telephone dialer communications means further includes means for generating a 48 volt telephone line emulation.
Claim 15
Dependent Claim
17 words
An apparatus according to claim 10, wherein: said telephone line interface means includes a DPDT relay switch.
Claim 16
Dependent Claim
24 words
An apparatus according to claim 10, wherein: said telephone number detector means includes one of a pulse dial detector and a DTMF tone detector.
Claim 17
Dependent Claim
39 words
An apparatus according to claim 10, further comprising: e) a plurality of sensor inputs coupled to said radio frequency transmitter, wherein said radio frequency transmitter transmits a message in response to a signal from one of said sensor inputs.
Claim 18
Dependent Claim
25 words
An apparatus according to claim 10, further comprising: e) means for causing said radio frequency transmitter to repeatedly transmit data received from the telephone dialer.
References Cited (Backward Citations)
US3914692A
Cited
US3925763A
Cited
US4465904A
Cited
US4228424A
Cited
US4521645A
Cited
US4577182A
Cited
US4724425A
Cited
US4868859A
Cited
US5027383A
Cited
US4887290A
Cited
US5131019A
Cited
US4905273A
Cited
US4993059A
Cited
US5134644A
Cited
US5517547A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-11-03 | 2001-05-05 | 2001-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-11-03 | 2005-05-05 | 2005-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-11-03 | 2009-05-05 | 2009-11-04 | $7700.00 | Window Closed / Lapsed |