Fault detection for subscriber loop repeaters
First Claim
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1. 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.
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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.
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Citations
22 Claims
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1. A method, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. 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. - View Dependent Claims (17, 18, 19, 20, 21, 22)
- a digital subscriber loop fault detection system including;
Specification