Each fiber is marked “A” or “B” or different colored connector boots are used to mark polarity. Similarly, 4, 6, 8, 12, 24, 48 and more than 48 fibers fiber optic pigtails have their corresponding feature. Fiber optic pigtail offers an optimal way to joint optical fiber, which is used in 99% of single-mode applications. The connector end is polished and tested under factory conditions, ensuring low insertion loss and high return loss. It is usually suitable for field termination using a mechanical or fusion splicer. Characterized by having an optical fiber connector on one end and a bare fiber end on the other, they are primarily used to connect optical transceivers or other optical.