Optical fibers can be used to transmit light and thus information over long distances. Fiber-based systems have largely replaced radio transmitter systems for long-haul optical data transmission. They are widely used for telephony, but also for Internet traffic, long high-speed local area networks (LANs), cable TV (CATV), and increasingly also for shorter distances within buildings. In most cases, silica fibers are used, except for very short distances, where plastic optical fibers can be advantageous. Course lectures must be taken online. Upon successful completion of the required on-line lectures and exams, the student will then attend the TR-TEL Hands-on training sessions scheduled. The hands-on training session is required to complete the Fiber Optics for Telecommunications Certification.