The Fiber Adapters is one of the most commonly used and very necessary product use in the fiber optics network, it is used for connection between various fiber connectors, fiber patchcords,fiber pigtails and fiber optic equipments, it offers the point to point connection the fiber optic network)Fiber optic adapters join separated connectors) They are assembled in panels and allow connecting pigtails with patchcords. For every type of connector there is equivalent type of adapter.
 

   Generally there are 2 types of alignment sleeve within an adapter/ phosphor bronze +or multimode and ceramic for singlemode) An case of MTOJ and MPO the alignment is carried out by 2 small pins fitted to one of the connectors, the adapter is purely to support and lock the connectors together in the distribution box)