They are the bridge between fiber optic cables in the field and the equipment or patch panels that manage them. By combining factory-installed connectors with spliced bare fiber, pigtails ensure that network installers can create fast, reliable, and cost-effective. Executive Summary: A fiber optic pigtail is one of the most commonly specified yet least understood components in structured cabling. The FC type pigtail has a simple structure and is easy to operate, making it user-friendly even for. nications rooms, data centers and at the desk. (Multimode -. A pigtail fiber indicates a short length of optical fiber cable that has a pigtail connector (for example, SC, FC, ST, LC, etc. This essential function of pigtail fiber is.