Data communication over alarm network tandem line
AssigneeGentex Corporation
InventorGregory J. Nagel
Life of this patent
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Abstract
A device capable of and method for communicating auxiliary data over an alarm network tandem line, whereby noise signals are filtered. The noise signals have an amplitude less than a first threshold. Further, a tandem signal is transmitted or received via a tandem port, wherein the signal transmitted or received is substantially synchronous with a noise signal peak or the transmission does not contain a period greater than the first duration. The period is measured as between two of: one or more disruption point, packet beginning, and packet finish, adjacently disposed. The disruption point is a point where the tandem signal is below a first amplitude threshold. Further, the combined amplitude of the tandem signal and the noise signal is greater than the first threshold.
Claims20
A device comprising:
- a detector device configured to detect an alarm condition, the alarm condition comprising the presence of at least one of smoke, carbon monoxide, flames, gas particles, or chemicals;
- a detector controller communicatively connected to the detector device, the detector controller operable to:
- communicatively connect to a tandem line, and
- at least one of transmit and receive a first tandem signal from the tandem line, to or from a second device, the first tandem signal:
- corresponding to an alarm condition, and
- having a frequency lower than a first frequency threshold, the first frequency threshold lower than a noise signal frequency, the noise signal present on the tandem line;
- and
- an auxiliary controller operable to:
- communicatively connect to the tandem line, and
- at least one of transmit and receive a second tandem signal from the tandem line, wherein:
- the second tandem signal transmitted or received is substantially synchronous with a noise signal peak,
- the combined amplitude of the tandem signal and the noise signal is greater than a first amplitude threshold, and
- the noise signal peak has an amplitude generally less than the first amplitude threshold.
A device network comprising:
- a plurality of alarm devices communicatively connected via a network of one or more tandem lines, each alarm device operable to:
- detect an alarm condition, and
- at least one of transmit and receive a first tandem signal from the tandem line network, to or from a second alarm device, the first tandem signal:
- corresponding to an alarm condition, and
- having a frequency lower than a first frequency threshold, the first frequency threshold lower than a noise signal frequency, the noise signal present on the tandem line network;
- and
- one or more auxiliary devices communicatively connected to the tandem line network, each auxiliary device operable to at least one of transmit and receive a second tandem signal over the tandem line network, wherein:
- the second tandem signal transmitted or received is substantially synchronous with a noise signal peak,
- the combined amplitude of the tandem signal and the noise signal is greater than a first amplitude threshold, and
- the noise signal peak has an amplitude generally less than the first amplitude threshold.
A method for communicating over a network comprising:
- filtering out signals having an amplitude below a first threshold amplitude, the first threshold amplitude generally greater than a noise signal amplitude, the noise signal present on the network;
- at least one of transmitting and receiving a first signal over a network, the first signal:
- corresponding to an alarm condition, and
- having a frequency lower than a first frequency threshold, the first frequency threshold being a frequency lower than the noise signal frequency;
- and
- at least one of transmitting and receiving a second signal over the tandem line network, wherein:
- the second tandem signal transmitted or received is substantially synchronous with a noise signal peak,
- the combined amplitude of the tandem signal and the noise signal is greater than a first amplitude threshold, and
- the noise signal peak has an amplitude generally less than the first amplitude threshold.
Dependencies are inferred from the claim text.