This guide provides a detailed roadmap for locating and fixing fiber optic cable breaks, covering detection techniques, repair methods, and best practices. “I felt resistance but assumed the flexible cable could handle a slight bend. The laser welding machine powered up normally, so I proceeded. Understanding the common causes of. Fiber optic cables enable high-speed, long-distance data transfer, forming the backbone of modern communication. Yet, outdoors, they face temperature swings, moisture, UV exposure, rodents, and human interference. That means rain, snow, and even high winds usually won't affect your service.