This forms the foundation of fiber optic troubleshooting Once the cause has been identified, implement targeted corrective actions such as cleaning connectors, replacing damaged cables, or reconfiguring modules. Test the link again to ensure normal operation has been restored. The most common problems usually fall into four categories: Physical Layer: Transmission Performance: Equipment and Module Failures:. This is where heat-shrink splice protection sleeves come in. You slide the sleeve onto the pigtail before you start the splice. The material used is specifically designed for fiber splice protectors, guaranteeing fiber closure protection. The installation of a. This guide helps you diagnose and fix the most common heat shrink tubing failures--fast and easy, like they were never even there. What's Wrong With My Heat Shrink Tubing? Heat shrink tubing is one of those things that should just work, which is why it's so frustrating when it doesn't look the way. Heat shrink tubing is a versatile plastic layer which can be applied to cabling and components for several purposes by electricians, engineers and similar professionals, including: They are also known as heat shrink sleeves, in particular when used with cables.