The 802K Digital LAN Tracing Kit from Tempo is a powerful, unique troubleshooting and tracing solution for local area networks and other types of VDV wiring. The industry standard 60Hz, 200FP filter probe is designed to eliminate hum from fluorescent lights and AC power wiring that can obscure tracing tones. The AT8L LAN Toner not only generates multiple tracing tones and provides basic wiring tests, but indicates the presence of 10/100 Base-T network service.
Patented - Patent #6946850