Pigtail/Patch Cord: These cables are tight buffered cables used for indoor purposes.There will be only one fiber in a single cable.The fiber will be coated with kevlar/aramid material..These are sometimes used for desktop connectivity also.
Loose tube Fibers: These are mainly used for outdoor purposes and contains large number of buffer tubes and inside the buffer tubes large number of fibers depending upon the number of fibers.These fibers will be mostly filled with jelly to prevent harm to the fibers from water.
Armoured cable: These cables are extensevely used in places where rodents is a problem.There will be metal armouring to prevent rodent penetering. Since there is a metal part these should be earthed properly.
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