What Is a Fiber Termination Box?

A fiber termination box (FTB) is the compact enclosure where a fiber cable run ends: fibers are spliced to pigtails or connectorized, adapters are presented at the front, and the splice is protected from dust, water, and handling. In FTTH networks the termination box sits at the last passive point before the subscriber — on a pole, in a building riser, or at the home entry.

Types by Installation

• Indoor wall-mount boxes for corridors, risers, and equipment rooms — compact ABS or metal housings, typically 8–24 cores.
• Outdoor boxes (IP65/IP68) for poles, façades, and hand-holes — sealed against rain and dust, with UV-stable housings and cable glands sized to the drop or distribution cable.
• Rack-mount termination for telecom rooms and data centers — 19-inch, 1U format; see our fiber optic patch panel range for high-count rack termination.
• DIN-rail and miniature boxes for industrial cabinets and tight spaces.

Capacity and Configuration Options

• Core count: 8, 12, 24, 48, up to 96 cores depending on the housing.
• Adapter interface: SC simplex or LC duplex adapters, UPC or APC polish — APC is standard for PON/FTTH.
• Splice management: integrated trays with splice sleeves, bend-radius control, and clear fiber routing.
• Splitter integration: many FTTH boxes accept a plug-in PLC splitter (1×4 to 1×16), so the box serves as the distribution point for a small cluster of homes.
• Loaded or unloaded: factory-fitted with adapters and pigtails to cut field time, or empty for on-site assembly.

How to Specify a Termination Box

1. Environment: indoor, façade, pole, or buried/hand-hole — this sets the IP rating and material.
2. Core count and growth: terminated circuits today plus spares.
3. Adapter type and polish: SC/APC is the FTTH default; LC for higher density.
4. Cable entries: number and gland range must match your drop cable or distribution cable diameters.
5. Splitter or plain splice: decide whether a PLC splitter goes inside.

FAQ

What is the difference between a fiber termination box and a distribution box?

A termination box is the endpoint of a cable run — fibers are terminated and presented on adapters for subscribers or equipment. A fiber distribution box sits one level up: it splits and routes fibers toward multiple termination points, often holding the PLC splitter. Small FTTH boxes frequently combine both roles.

Termination box vs patch panel?

Same function, different form factor and environment: boxes serve outside-plant and building-entry points with sealed housings, while patch panels serve 19-inch racks indoors at higher port counts.

Should I order boxes loaded or unloaded?

Loaded boxes (adapters and pigtails pre-fitted, splices done in the field) cut installation time per home passed. Unloaded boxes cost less and give flexibility when interface types are not fixed yet.

What IP rating do I need outdoors?

IP65 is the practical minimum for pole and façade mounting; IP68 for hand-holes or any location that can flood. Match the gland size to the cable OD to keep the seal effective.