The FOSC-400 closure is a single-ended, environmentally sealed enclosure for fiber management in the outside plant network.Base-to-dome seals on FOSC 400 are mechanical for ease of installation and re-entry. Cable seals feature a new heatshrink sleeve and hot melt adhesive system that is installed with a hot-air gun.
Common materials, accessories and practices are used throughout the product line to simplify training, reduce inventory and enhance productivity. FOSC 400 fiber optic splice closures are available in three sizes: the FOSC 400 A, FOSC 400 B and FOSC 400 D.All sizes are designed for use with any cable construction (loose buffer tube, central core tube, loose fiber, ribbon), in any environment (aerial, pedestal, buried, handhole, manhole) and for numerous splice applications (expressed, tap-off, branch and repair).FOSC 400 A4/A8 closure
The FOSC 400 A4 closure is the smallest in the FOSC 400 series. It is intended for low fiber-count cable splices and “tap-off” splices. Tap-off splices are those where most of the fibers in a cable are ‘expressed’ uncut through the closure. Only a few fibers are cut and re-spliced to feed a building or Optical Network Unit (ONU). The FOSC 400 A4/A8 closure comes ready to store expressed loose buffer tubes. An optical slack storage basket is available for expressed stranded fiber and ribbon fiber. As with all FOSC 400 closures, the slack storage and splice capacity of the FOSC 400 A4/ A8 depends on factors such as cable construction, splice type and slack fiber lengths.FOSC 400 B2 and FOSC 400 B4 closures
FOSC 400 B2 and FOSC 400 B4 closures are identical except for their end cable port configuration. In addition to a large oval port for the main distribution cable, the B2 closure has two large round ports for branch cable splices while the B4 closure has four small round ports for multiple drop applications. The FOSC 400 closure cable sealing system provides a great deal of flexibility. For example, with the use of branch-off clips four small cables can be terminated in two round ports of a B2 closure.FOSC 400 D5 closures
The FOSC 400 D5 closure is the largest in the FOSC 400 series. It can terminate seven cables (or up to twelve cables with the use of branch off clips), through one oval port and five large round ports. The splice capacity is 288 single mechanical, 768 single fusion or 1152 mass-fusion (12) fibers. Ribbon fiber can be stored directly on the trays or in the versatile slack basket that also holds expressed or uncut loose buffer tubes.
Key features of the FOSC 400 closures:
- Single-ended design
- Available in 4 sizes
- Base and dome sealed with a clamp and O-ring system
- Feature 2, 4, 5 or 8 round cable ports and 1 oval port are provided
- Standard FOSC-400 kit includes oval seal
- FOSC splice trays hinged for access to any splice without disturbing other trays
- Compatible with most common cable types: e.g. loose tube, central core, slotted core, ribbon fiber
- Uncut or expressed loose tubes can be stored in storage baskets
- Closure can be used in aerial, pedestal and underground (up to 5 meters waterhead) environments