Patent ID: 8170814

Claim:
A system to determine an impedance mismatch, the system comprising: processing logic and a memory accessible to the processing logic, the memory including instructions executable by the processing logic to: measure, at a customer premise equipment device, transmission quality data related to a communications loop between the customer premise equipment device and a server; determine an impedance mismatch between a transmission line and the customer premise equipment device based on the measured transmission quality data, wherein determining the impedance mismatch comprises: determining curve shapes of active line noise at an upstream channel frequency boundary from a central office and at a downstream channel frequency boundary from the customer premise equipment device; determining a presence of the impedance mismatch when a first curve shape of active line noise at the upstream channel frequency boundary has a first slope that is greater than a first slope threshold or when a second curve shape of active line noise at the downstream channel frequency boundary has a second slope that is greater than a second slope threshold; performing a comparison of the first slope of the first curve shape at the upstream channel frequency boundary to the second slope of the second curve shape at the downstream channel frequency boundary; and determining a relative location of the impedance mismatch based on the comparison of the first slope to the second slope; and transmit a source and the relative location of the impedance mismatch to the server.