We know that optical transceivers are usually used with optical fiber jumpers. Only one end of the pigtail has a connector, and the other end is a broken end of the. When you build or upgrade a fiber network, the same four words pop up everywhere— fiber optic (bare fiber), pigtail, patch cord, optical cable. They're related, but they are not interchangeable. Mixing them up drives costs higher, increases loss, and slows your rollout. What are. Optical fiber jumper, also known as optical fiber connector, means that both ends of the optical cable are equipped with connector plugs to realize the active connection of the optical path.