The Pro3000 Analog Tone and Probe are your best choice for toning and tracing wire on non-active networks, and specifically for identifying individual pairs with SmartTone technology.
Angled bed-of-nails clips allow easy access to individual wires, and the RJ11 connector is ideal for use on telephone jacks. The large loud speaker on the probe allows you to hear through drywall, wood or other enclosures to find wires quickly and easily. You can send this loud tone up to 10 miles on most cables!
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.