FOSCIS4 Inline Type Fiber Optic Splice Closure (FOSC)

Integrating FirstFiber's FOSCIS4 inline splice closure across our regional optical network simplified field splicing and maintenance. Its mechanical sealing structure with thermoplastic rubber grommets lets our technicians reopen and reseal the unit cleanly without requiring heat shrink torches. Equipped with 4 inlet/outlet ports accepting cable diameters up to 16 mm, it offers excellent entry flexibility for inline feeder lines and distribution drops. Built with a rugged Polycarbonate (PC) body that functions in extreme environments from -40°C to +65°C, the housing maintains watertight protection across aerial, direct-buried, and manhole deployments. Internally, the 4 dual-layer splice trays accommodate up to 96 bunchy fibers (24 fibers per tray) or 144 ribbon fibers, while a central foundation plate firmly secures cable strength members.

At a reference baseline price of just $16 USD, the FOSCIS4 provides utility-grade environmental protection at an unbeatable value. Featuring compact dimensions of 413 (L) × 160 (W) × 88 (H) mm and a net weight of 1.6 kg to 2.1 kg, the slim inline chassis is lightweight and easy for crews to mount during overhead aerial hanger or wall installations. The product arrives as a turnkey kit supplied with standard accessories, including 2 aerial hanging hooks, M6 and M10 wrenches, sealing tape, insulation tape, nylon ties, grounding wire, abrasive cloth, and fiber protective sleeves. Supporting up to 144 ribbon fibers with orderable capacity options ranging from 24 to 96 Cores, it is a cost-effective choice for expanding municipal FTTx networks.

We standardized on the FOSCIS4 for underground duct, pipeline, and direct-buried splicing contracts due to its rigid Polycarbonate outer body. Joined by heavy-duty bolts and an internal sealing grommet, the chassis withstands soil compression and vibration without leaking water. We added the optional pressure testing valve to perform air pressure integrity checks prior to trench backfilling. The closure includes 4 port plugs to seal unused cable entries, and its 4 splice trays neatly maintain the proper bend radius for active buffer tubes. It is a thoroughly dependable, reusable inline splice closure for long-term outdoor cable management.