What is an optical fiber splice box called

An optical fiber splice box is also called a splice distributor, splice closure, fiber joint box, or optical termination box. An optical fiber splice box is a protective housing where fiber optic cables are joined or terminated, ensuring signal integrity and environmental protection. It is commonly referred to as a splice distributor, highlighting its role in organizing and distributing fibers within a network.

In outdoor or underground applications, it is often called a fiber joint box or splice closure, designed to protect splices from environmental hazards while providing mechanical strength and cable management. Some manufacturers and sources also use the term optical termination box, particularly for indoor or rack-mounted units, emphasizing its function in terminating and managing fiber connections within controlled environments. Hybrid versions may support both fiber and copper connections, as well as power supply, making them versatile for complex installations.

These boxes can be wall-mounted, floor-mounted, or rack-mounted, and typically include removable splice cassettes or trays that facilitate fiber splicing, storage, and organization. They are essential in both FTTH networks, data centers, and long-haul telecom systems, ensuring low signal loss and reliable connectivity.