A fiber distribution box (FDB) is a passive enclosure that provides secure splicing, termination, and distribution of optical fibers. They function as junction points that manage, protect, terminate, and distribute fiber optic cables, ensuring efficient data transmission between different. A distribution box serves as a critical component in fiber optic networks. FDBs are commonly installed: An FDB is not just a “box” — it performs several critical functions: 🔗 1. It provides a secure space where incoming fiber optic cables from the provider's network are.