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US 2009/0263128 A1Published application
Fiber optic multiplex modem
AssigneeSimplexGrinnell LP
InventorsJoseph D. Farley, Gary W. Vincent, Brian A. Rusiecki, Kenneth E. Savage, JR.
Life of this patent
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Abstract
A fire alarm network fiber optic multiplex modem includes plural local interfaces, a fiber optic interface, a multiplexor, a fiber optic modem, and a demultiplexor. The multiplexor combines data received at the local interfaces into an outgoing data stream. The fiber optic modem transmits, at a first wavelength, the outgoing data stream to the fiber optic interface and receives, at a second wavelength, an incoming data stream via the fiber optic interface. The demultiplexor separates the incoming data stream into separate data streams, and forwards each of the separate data streams to its corresponding local interface.
Claims19
A fire alarm network fiber optic multiplex modem, comprising:
- plural local interfaces, a first interface of the plural local interfaces configured to interface with data of a first data type and a second interface of the plural local interfaces configured to interface with data of a second data type, the first data type being different from the second data type, wherein at least one of the first or second interfaces receives a signal that is unsynchronized with the fiber optic multiplex modem and wherein the signal is oversampled at plural intervals within a frame cycle and compressed;
- a fiber optic interface;
- a multiplexor which combines data received at the local interfaces into an outgoing data stream, wherein at least one digital value is placed in the outgoing data stream based on the compressed oversampled signal;
- a fiber optic modem which transmits, at a first wavelength, the outgoing data stream to the fiber optic interface and which receives, an incoming data stream via the fiber optic interface;
- and
- a demultiplexor which separates the incoming data stream into separate data streams, and which forwards each of said separate data streams to a corresponding local interface.
3 more elements
-48. (canceled)
A fire alarm network fiber optic multiplex modem, comprising:
- plural local interfaces, a first interface of the plural local interfaces configured to interface with data of a first data type and a second interface of the plural local interfaces configured to interface with data of a second data type, the first data type being different from the second data type, wherein at least one of the first or second interfaces receives a signal that is unsynchronized with the fiber optic multiplex modem and wherein the signal is oversampled at plural intervals within a frame cycle;
- a fiber optic interface;
- a multiplexor which combines data received at the local interfaces into an outgoing data stream, wherein at least one digital value is placed in the outgoing data stream based on the oversampled signal, the at least one digital value indicating in which of the oversampled signal the received signal changed values;
- a fiber optic modem which transmits the outgoing data stream to the fiber optic interface and which receives an incoming data stream via the fiber optic interface;
- and
- a demultiplexor which separates the incoming data stream into separate data streams, and which forwards each of said separate data streams to a corresponding local interface.
3 more elements
A method for communicating between nodes in a fire alarm network, the method comprising:
- multiplexing data received from plural local interfaces into an outgoing data stream, a first interface of the plural local interfaces configured to interface with data of a first data type and a second interface of the plural local interfaces configured to interface with data of a second data type, the first data type being different from the second data type, wherein at least one of the first or second interfaces receives a signal that is unsynchronized with the fiber optic multiplex modem and wherein at least one digital value is placed in the outgoing data stream based on the compressed oversampled signal;
- transmitting the outgoing data stream to a fiber optic interface;
- receiving an incoming data stream via the fiber optic interface;
- demultiplexing the incoming data stream into separate data streams;
- and
- forwarding each of said separate data streams to a corresponding local interface.
3 more elements
A fire alarm network fiber optic multiplex modem comprising:
- plural local interfaces, a first interface of the plural local interfaces adapted to interface with data of a first data type and a second interface of the plural local interfaces adapted to interface with data of a second data type, the first data type being different from the second data type, wherein at least one of the first or second interfaces receives a signal that is unsynchronized with the fiber optic multiplex modem and wherein the signal is sampled at plural intervals within a frame cycle;
- a fiber optic interface;
- a multiplexor which combines data received at the local interfaces into an outgoing data stream, wherein a digital value is placed in the outgoing data stream based on at least one of said samples;
- a fiber optic modem which transmits the outgoing data stream to the fiber optic interface and which receives an incoming data stream via the fiber optic interface;
- a demultiplexor which separates the incoming data stream into separate data streams, and which forwards each of said separate data streams to a corresponding local interface;
- a cross-link to a second fiber optic multiplex modem, the cross-link normally completing a communications loop;
- and
- a fault detector which, upon detection of a fault in a communications path that extends from the fiber optic interface, disconnects the cross-link.
5 more elements
Dependencies are inferred from the claim text.