Likely due to misalignment of fibers because of dirty V-grooves or not calibrating the equipment correctly—clean the V-grooves and recalibrate the equipment. More often than not, quick resets and maintenance can restore performance right on the job, minimizing downtime. Fibre fusion splicers are critical instruments in modern optical fibre installation and maintenance. Fiber optic splicing combines precision mechanics, material behaviour, and environmental factors, all of which influence the result. IEC 61300 standards and best practices from. Here are the most common Fusion Splicing Problems you will encounter in the field and the straightforward fixes to solve them: 1. Even a minor error can lead to significant signal loss or faulty splices. In fact, even a small offset of.