An elevator traveling cable is the flexible cable assembly that links the elevator car to the controller, machine room, and building systems while allowing continuous vertical travel. It typically contains multiple conductors to support power, control, and communication functions. That's why the right solution is not “any fiber cable in the shaft,” but a true Elevator Traveling Cable engineered to carry fiber optic elements reliably under motion. The vast majority, as much as 95%, of wire and cable produced will be installed in a fixed location. This includes sending command for opening and closing of elevator doors and movement of the elevator car.