FOSCIO6 Inline Type Fiber Optic Splice Closure (FOSC)

Integrating FirstFiber's FOSCIO6 inline splice closure across our regional optical network solved several multi-diameter cable transition requirements. The 6 entry ports are arranged across three distinct sizes—2 ports up to 13 mm, 2 ports up to 16 mm, and 2 ports up to 20 mm—giving field technicians great routing flexibility when branching main feeds into distribution drops. Its mechanical sealing system featuring thermoplastic rubber grommets provides a reliable watertight seal without needing heat guns. Built from durable Polycarbonate (PC) and operating across -40°C to +65°C, the closure withstands harsh weather conditions in aerial, pipeline, wall-mount, and manhole installations. Internally, its 4 splice trays support up to 96 bunchy fibers (24 fibers per dual-layer tray) or 144 ribbon fibers.

At a reference price starting at just $18 USD, FirstFiber's FOSCIO6 delivers exceptional commercial value for B2B optical network builds. Measuring 470 (L) × 180 (W) × 125 (H) mm with a net weight ranging from 2.3 kg to 3.0 kg, the enclosure is easy for field crews to handle during overhead aerial hanger and wall-mount installations. The product arrives as a complete turnkey package supplied with standard accessories, including M8 and M10 wrenches, 2 aerial hanging hooks, 6 port plugs, sealing tape, insulation tape, nylon ties, a grounding wire, abrasive cloth, and fiber protective sleeves. Supporting up to 144 ribbon fibers with selectable capacities from 24 to 96 Cores, it is a highly economical solution for expanding municipal FTTx lines.

We standardized on the FOSCIO6 for underground pipeline, manhole, and direct-buried splicing contracts due to its rigid Polycarbonate outer body. Joined by heavy-duty bolts and an internal sealing grommet, the housing withstands soil compression and environmental stress without leaking water. We opted to equip our units with the optional pressure testing valve and desiccant bag to perform air pressure integrity checks prior to trench backfilling. The central foundation plate firmly secures cable strength members and buffer tubes, while the 6 port plugs maintain airtight seals on unused cable entries. It is a thoroughly dependable, reusable inline splice closure for long-term outdoor cable management.