One of the simplest ways to coil a cable is by doing it manually. Over-Under Coiling: This method alternates the direction of each loop, preventing tangles and kinks. Cables can wear out and become damaged if they are not stored properly. When all your. Keeping cables organized and tangle-free can be a daunting task, especially with the myriad of devices and cords that we use on a daily basis. Excessive bending angles will damage or even break the optical fibers, causing communication interruption. The. The world's fiber-optic network spans more than 550,000 miles of undersea cable that transmits e-mail, websites, and other packets of data between continents, all at the speed of light.