The Tone Generator from Cables To Go is a highly practical network installation and trouble-shooting tool which features a single or multi-tone signal, two test leads and a 4-conductor modular cable. The signal emitted by the Tone Generator can be easily traced by the Probe, even when cables are in a bundle or hidden in a mess of punchdown blocks or wall plates. The Tone Generator and Probe can be used to verify cable continuity, identify wiring faults, determine line polarity and voltage in network (Cat5 and Coax) and modular telephone lines. The Probe is equipped with a tone amplifier and an LED indicator that detects audible frequency tones for accurate tracing and identification of wires.