Telecommunications – Carrier wave repeater or relay system – Failure compensation
Reexamination Certificate
2007-10-22
2011-10-04
Nguyen, Duc M (Department: 2618)
Telecommunications
Carrier wave repeater or relay system
Failure compensation
C455S015000, C455S016000, C246S00100C, C246S015000, C246S162000, C340S507000, C340S508000
Reexamination Certificate
active
08032078
ABSTRACT:
An interface device for interfacing a set of wayside systems with a radio transmitter includes a plurality of input ports each having at least one input for receiving a signal representing a state of a corresponding wayside system and first and second parallel data paths coupled to the plurality of input ports. Each data path includes input protection circuitry coupled to the inputs of the input ports for preventing short-circuit and open-circuit conditions from triggering a false input state, a multiplexer for selecting between the input port; and a processor for scanning the input ports with the multiplexer to determine the state of current signals appearing at the inputs. In response to determining the state of the current signals appearing at the inputs, the processor generates a message communicating a current state of the wayside systems for delivery to the radio transmitter.
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Donich Thomas G.
Fulthorp Richard J.
Kelley David B.
Kulik Paul F.
Smith Dale K.
MeteorComm, LLC
Murphy James J.
Nguyen Duc M
Thompson & Knight LLP
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