Apparatus, systems and methods of common mode based diagnostics

An apparatus comprising:

• a signal generator to inject a common mode signal probe onto a first end of a Digital Subscriber Line (DSL line);
• a signal receiver to measure impedance of the common mode signal probe on the DSL line at the first end of the DSL line;
• a signal detector to detect an impedance anomaly on the DSL line based on the measured impedance of the common mode signal probe;
• and
• a signal analyzer to correlate the impedance anomaly on the DSL line to a boundary condition on the DSL line.

A non-transitory computer readable storage medium having instructions stored thereon that, when executed by a processor of an apparatus, the instructions cause the apparatus to perform operations comprising:

• injecting a common mode signal probe onto a first end of a Digital Subscriber Line (DSL line);
• measuring impedance of the common mode signal probe on the DSL line at the first end of the DSL line;
• detecting an impedance anomaly on the DSL line based on the measured impedance of the common mode signal probe;
• and
• correlating the impedance anomaly on the DSL line to a boundary condition on the DSL line.