CABLES TO GO 29400 Psiber Cable Tracker Network ID Complete KitThis kit consists of the CT10 toner blinker, the CT15 tone probe, the CC2 carrying case, and one RJ45 jumper cord; it is specifically designed for network managers and technicians. Toning an active LAN circuit can disrupt network traffic and is difficult to track due to cable twist and tone bleed. This test system works with both active and inactive (dark) cables, and features a port ID function that blinks the link light to verify cable connectivity.