Fluke Networks 26200900 Pro3000 Analog Tone Generator, SmartTone Technology, 10 Mile Signal Range, Angled Bed-of-Nails Clips
Use the SmartTone capability of the Pro3000 Tone Generator to identify the right pair. When touching the wires together and momentarily shorting the far end of a cable pair, the SmartTone technology will change the cadence of the tone generated. This tone change you hear through the probe positively verifies the correct wire pair. SmartTone provides five distinct tones for exact pair identification.