Test Loss: Use OTDR or Optical Power Meter (Target: <0. Verify: Use a VFL (Visual Fault Locator) to check continuity. Finalize: Apply strain relief and attach cable labels. Butterfly-shaped optical fiber cables, also known as ribbon fiber optic cables, are a type of fiber optic cable that contains multiple fibers within a single flat ribbon. In this. Terminating fiber optic cable is a crucial step in the installation process, as it ensures a reliable and efficient connection. Termination involves attaching either a removable connector or a permanent splice to the fiber's end so it can mate with other fibers or equipment. Its name comes from the cable's cross-sectional profile: a flat, symmetrical shape in which two strength members.