FOSC, or Fiber Optic Splice Closure, is a specialized protective enclosure specifically engineered to safeguard fiber optic splices – the critical junction points where individual optical fibers are permanently joined together. These closures create a sealed, controlled environment that protects. Together with our partner, Commscope, we deliver quality splice boxes in the FOSC series. The FOSC-400 series has hot shrinkage of cable inlets. FOSC-450 gel splice closures have the same splice capacity as FOSC-400 closures and feature the same reliable and easy-to-use dome-to-base clamping system. Without reliable FOSC, even the highest-quality fiber cable is vulnerable to moisture, rodents. Delve into detailed insights on the Fiber Optic Splice Closures (FOSC) Market, forecasted to expand from USD 1. 5 billion by 2033 at a CAGR of 8.