Data transmission apparatus for use with a security system having a telephone dialer
First Claim
1. 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, whereinwhen 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.
1 Assignment
0 Petitions
Accused Products
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.
49 Citations
16 Claims
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1. A data transmission apparatus for use with a telephone dialer coupled to a telephone line, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A data transmission apparatus for use with a telephone dialer coupled to a telephone line, comprising:
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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. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification
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- Resources
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Current AssigneeCRN Telemetry Devices, Inc.
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Original AssigneeCRN Telemetry Devices, Inc.
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InventorsHartmann, Wade A., Krieger, Herbert B., Saunders, Anthony E.
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Primary Examiner(s)Chan, Wing F.
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Application NumberUS08/520,272Time in Patent Office799 DaysField of Search379/32, 379/33, 379/26-28, 379/31, 379/37-44, 379/46-51, 379/59, 379/60, 379/221, 379/93, 379/354-357US Class Current379/40CPC Class CodesH04M 11/04 with alarm systems, e.g. fi...
