The function of the optical splitter in the fiber distribution box

An optical splitter is installed inside a fiber distribution box to divide a single optical signal into multiple outputs, enabling efficient distribution to multiple subscribers in FTTH networks.

Role of the Fiber Distribution Box

A fiber distribution box serves as a central point for fiber termination, splicing, and distribution in access networks. It provides a protected environment for managing optical fibers, ensuring proper routing, protection, and maintenance access. Distribution boxes are typically located at intermediate points between the central office (or ODF) and the end-user premises, such as in corridors, small community telecom rooms, or on outdoor poles .

Role of the Optical Splitter

An optical splitter is a passive device that divides a single optical signal from the feeder cable into multiple outputs for delivery to multiple end-users. Splitters can be of types like PLC (Planar Lightwave Circuit) for large splits (1:32, 1:64) or FBT (Fused Biconical Taper) for smaller splits (1:2, 1:4). They allow a single OLT port to serve multiple ONTs, reducing fiber and equipment costs while maintaining signal quality .

Integration of Splitters in Distribution Boxes

The fiber distribution box often houses the optical splitter, integrating it with fiber termination and splicing functions. This setup allows the feeder fiber from the ODF or central office to enter the box, where the splitter divides the signal into multiple drop fibers that connect to subscribers. The box provides mechanical protection, cable management, and easy access for maintenance, ensuring the splitter operates reliably in both indoor and outdoor environments .

Network Placement

• ODF (Optical Distribution Frame): Located in the central office, managing backbone fibers.
• Splitter Distribution Box: Positioned in the access network, distributing signals from the feeder fiber to multiple subscriber fibers.
• Fiber Terminal Box: Installed at the end-user premises for final fiber termination and connection to ONTs .

Summary

The relationship between an optical splitter and a fiber distribution box is that the splitter is a key component installed inside the distribution box. The box provides the necessary infrastructure to protect, organize, and manage the splitter and associated fibers, enabling efficient and scalable distribution of optical signals to multiple subscribers in FTTH networks .