The media is on the layer 1: Physical.
A layer of a glass surrounding the center fiber of a glass inside a fiber-optic cable is called cladding.
Fiber-optic cable.
A Toslink IS a Fiber Optic Digital Interconnect cable
Multimode fiber optic cable at 850nm
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fiber loop application
Fiber cable, or fiber optic cable, is primarily used to transmit bandwidth. Cable service providers and internet service providers use these cables to transmit their services to devices, such as modems and cable box units in consumers' homes.
Medium
Describe refraction and reflection with respect to Fiber Optical Cable?
62.5/125 Fiber
An OTDR will help to find flaws in the fiber and it's connections.
I think there is a layer of glass wich reflects the wave down the cable the the reciver turns it into digatel or audio and gives of a messadge to the tv or radio or any other