1. An anomaly detection system, comprising: a telecommunication line having a plurality of wires including at least a first wire joined to a second wire, the telecommunication line having a time varying anomaly at a junction of the first wire and the second wire, the time varying anomaly causing a transmission characteristic of the telecommunication line to fluctuate at the junction; a transmitter coupled to the telecommunication line; logic configured to maintain tap coefficients based on signals communicated across the subscriber line, wherein each of the tap coefficients is indicative of an impedance of the junction at a different moment in time; and anomaly detection logic configured to calculate a deviation of each of the tap coefficients from a respective baseline coefficient and to determine a value indicative of a number of the calculated deviations within a predefined range of a threshold, the anomaly detection logic further configured to detect the anomaly based on the value and to indicate a location of the detected anomaly along the telecommunication line.