What does happens when fiber cut occur? Someone need to fine the location of cut and restore. The restroration technique of fiber or merging the two fiber ends in one to increase its length is known as splicing. It is done in two ways
1. Mechanical Splicing
2. Fusion Splicing
Every splicing add some looses in the end to end calculation. For fusion splicing a loss of 0.02 dB is measured and for mechanical loss of 0.75 dB is measured. If it is not done in good manner it could increase the losses consequence drop in the data rate. The best way to check the total number of splices in end to end circuit is to see the OTDR (Optical Time Domain Reflector) report which helps to find the problems in the fiber.