Patent ID: 6922464
Filing Date: 2005-07-26
Classification: H04M

Abstract:
1. A system for monitoring a communications circuit, comprising: at least one impedance element, wherein the at least one impedance element is configured to be connected to the communications circuit when the communications circuit is established, and wherein the at least one impedance element causes communication devices communicating via the communications circuit to adapt to a presence of the at least one impedance element; at least one reference ground point, wherein each impedance element is configured to be switchably connected to a respective reference ground point; at least one monitor access element, wherein each impedance element is configured to be switchably disconnected from a respective monitor access element, and wherein each monitor access element is configured to be a virtual reference ground point; and at least one communications circuit monitor, wherein the at least one communications circuit monitor is configured to be connected to the respective monitor access element, and