The distribution box can be extended by a pole holder. My question is: Can I move the ONT unit, it has just been installed. The engineer said, no, I want plenty of clearance, and drilled the hole 2 ft further up. It can house PLC splitters with 1:2, 1:4 or 1:8 splitting ratio. Before I contact them, I need help understanding what they are but can't upload a picture. Fiber Distribution box (FDB), known as optical Distribution box (ODB) as well, is a compact fiber management product of small size. We no longer actively offer this product. Capacity of 8 optical connectors Connector holder SC, ST, FC, E2000, LC Placement of.