The TK 210 Live Fiber Trace and Tone kit provides all of the necessary tools to allow the technician to identify available fibers in the F2 portion of the FTTx network. This trace technique provides identification without the disruption of existing subscribers for purposes of re-route or cutover. To trace a specific fiber for cutover simply place a compatible light source into its 2kHz modulation mode and plug it on to the fiber. At the distribution hub place the LFI 110 onto the RP 450.