Patent ID: 7857642

Claim:
A probe tip for use with an inductive amplifier unit and insertion into an opening of a communication jack, the opening having a keyway portion operable to define a receiving orientation for a plug having a keyed portion, the opening being operable to prevent the reception of a plug with a keyed portion oriented in other than the receiving orientation, the probe tip comprising: a substantially non-conducting inductive member having a keyed portion receivable inside the keyway portion of the opening of the jack when the inductive member is oriented in the receiving orientation, the inductive member being non-receivable inside the opening of the jack when oriented in other than the receiving orientation; and a conductive member having a first portion encased inside the inductive member and a second portion protruding from the inductive member, the second portion of the conductive member being attachable to the inductive amplifier unit and when so attached operable to conduct a signal inductively detected by the first portion of the conductive member to the inductive amplifier unit.