What is the function of splice trays inside splice closures?

The function of splice trays inside splice closures is primarily to protect the splices and provide storage for fiber slack. Splice trays are designed to hold optical fibers securely and organize them to prevent damage during installation or maintenance activities. By housing the splices in a protected environment, splice trays ensure that the connections remain intact and are shielded from potential environmental hazards, such as moisture and dust. Additionally, they have features that allow for the management of extra fiber length, which ensures that fibers can be properly stored without kinking or bending, helping to maintain the integrity of the optical fibers over time. Thus, the ability to both protect the splices and manage fiber slack makes splice trays an essential component in splice closures.

The other options do not accurately describe the primary function of splice trays. Enhancing transmission speed or simplifying maintenance don't directly relate to the role of splice trays, nor do they address the specific characteristics associated with splice closure functions. Reducing the size of splice enclosures is more about the design of the enclosure rather than the role of the trays themselves.