IDENTIFIER, DIGITAL SIGNAL (T-BUG) by Greenlee

Used to detect digital signals on twisted pair cables, identify and isolate digital pairs for special handling and help technicians avoid accidentally putting pairs out of service. Operation is non-invasive and does not involve metallic contact so there's no risk of service interruption. Simple to use - just place the probe between the pairs in question. Differential amplifier saves time by allowing the technician to determine whether the signal is truly present or is an induced signal from adjacent pairs. False readings due to noise are virtually eliminated. Continuous self test ensures that the unit is functioning properly. Emits both visible and audible indication when digital signals are present. Patented.