While SC (Square Connector) type connectors have a 2.5 mm diameter ferrule structure; LC (Lucent Connector) type connectors have a 1.25 mm diameter ferrule structure. The abbreviations PC, UPC, and APC are definitions expressing the physical differences of the surface geometries of the connectors on the ceramic ferrules. UPC (Ultra Physical Contact) indicates that the ceramic ferrule structure on the connector has an extra polished flat structure; APC (Angled Physical Contact) indicates that the ceramic ferrule structure on the connector has an extra polished 8° angle structure.
3.0 mm diameter multi-fiber cables that consist of 12 fibers (each diameter is 250 microns) that are manufactured with ITU-T G657.A2 bend-sensitive fibers. All fibers are tubed (each diameter is 1.8 mm) with the use divider with a special solution, on both sides, then assembled at one end with SC type and; the other end with LC type connectors.
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