The FC fiber pigtail has a primary coating (900µ) in the colour of the respective category (see table). The colour of the primary coating is equal to the colour of the secondary coating. A numeric connector coding 1 .. 12 simplifies the allocation of the ports. The pigtails can be ordered separately. Because the standard batch size for ordering pigtails is 12, in a polybag are 12 pigtails. Each connector is packed separatly for an easy remove of each pigtail. Every PU contains an individual measuring protocol.