Fault detection for subscriber loop repeaters
AssigneeSymmetricom, Inc.
InventorsGary Bogardus, Sandro Squadrito, Kishan Shenoi
Life of this patent
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Abstract
Systems and methods are described for fault detection for subscriber loop repeaters. A method includes monitoring an upstream signal on a digital subscriber loop for a fault detection signal that is added to said upstream signal at a repeater; and determining if a fault has occurred. An apparatus includes a digital subscriber loop fault detection system including: a receiver circuit that monitors an upstream signal on said digital subscriber loop for a fault detection signal that is added to said upstream signal at a repeater; and a logic circuit that determines whether a fault has occurred.
Claims22
A method, comprising:
- monitoring an upstream signal on a digital subscriber loop for a fault detection signal that is added to said upstream signal at a repeater;
- and
- determining if a fault has occurred, wherein the method further includes, before monitoring said upstream signal, monitoring a downstream signal at said repeater, determining whether a signal strength within a frequency band of said downstream signal is above a threshold and adding said fault detection signal to said upstream signal at said repeater, if said signal strength within said frequency band of said downstream signal exceeds said threshold.
An apparatus, comprising:
- a digital subscriber loop fault detection system including:
- a receiver circuit that monitors an upstream signal on said digital subscriber loop for a fault detection signal that is added to said upstream signal at a repeater;
- and
- a logic circuit that determines whether a fault has occurred, wherein said repeater locally generates said fault detection signal, wherein said fault detection signal includes a tone having a center frequency.
Dependencies are inferred from the claim text.