An armored pigtail is a fiber optic cable with a connector on one end and an open end on the other, which can splice to another cable's fiber core. Get the wrong connector type, the wrong polish, or skip proper fusion splicing technique—and you're looking at elevated signal loss, increased back reflection, and a. That is a fiber optic pigtail, and it is one of the most misunderstood parts of an optical network. Order the wrong buffer diameter or fiber grade and your splice tray turns into a mess. By combining factory-installed connectors with spliced bare fiber, pigtails ensure that network installers can create. Superior Simplex OS2 Single Mode LC, SC, FC, ST, or LSH Armored 3. They come in two types: single-mode and multimode.