A fiber optic cable uses plastic or glass threads for transmitting data. This type of a cable contains a bundle of glass threads. Each of the glass thread uses light pulses instead of electronic pulses to transmit information through the fiber lines. The information is transmitted digitally instead of analogically. These cables work on the basis of a principle known as total internal reflection. The light pulses move through the fiber optic line based on this principle. The light pulses used in these cables is near infrared light (850nm, 1300nm and 1500nm). Fiber optic wires are mainly used in local area networks, telephone systems, cable television services and electric utility companies. These wires have a greater bandwidth as compared to metal wires. Further, these cables are less prone to interference. http://amplify.com/u/a1jeze