Fiber Optic Cable and Splice Closure Solutions | Corning

Your connections deserve the best protection. No matter the size and configuration of your network, protecting its connectivity is what counts.

Cable and Closure Pairing Solutions

Cable and Closure Pairing Solutions

Fiber closures provide options for keeping your network technology safe and streaming. Corning offers optimized pairings of closures and cable types to help you decide what's essential to your network’s set up.

There are several things to consider when choosing the right fiber closure for your network: aerial vs. buried, in-line vs. butt, number of port counts, and minimum cable diameter, to name a few. With just a few basics about where you need fiber closures and what kind of cable connections you’re making, we can help you make the right decisions for your network today and in the future, as it grows.

  • What Is a Fiber Optic Closure?

    It is a fiber enclosure that is either watertight or breathable, aimed at protecting optical fiber splices and connectors coming from different outside plant cables and offers a full protection to the optical fiber. Cables can be feeder, branch, drop, ribbon, loose tube, and microcables.

    Splice closures can be used below grade, either direct-buried, in a manhole/handhole, or aerial on a façade, pole, or strand-mounted on a messenger or ADSS cable. 

    From a construction standpoint, a fiber optic splice enclosure is composed of the enclosure shell ensuring weather protection, a fiber manager which allows routing and protection to buffer tubes, the bare optical fiber, and relevant splices and cable entries.

  • What is a butt closure?

    A butt closure is an optical splice enclosure which has all the cable ports on the same side.

  • What is an in-line closure?

    An in-line closure is a splice enclosure with a cable port on two opposite sides. 

  • What is single circuit management?

    Single Circuit Management (SCM) is a type of optical fiber manager inside an optical fiber enclosure. SCMs are dedicated thin fiber splicing trays protecting a circuit 9a-pair or an element, and designed to offer a high grade of fiber protection and separation.  Fibers are protected outside the tray and fiber routing is very flexible and adapted to specific engineering.

  • What does gasket-sealing mean?

    The enclosure is sealed watertight with gaskets.

  • What are closure express ports?

    An express port, also called an oval port or midspan port, allows an optical fiber cable to be sealed and strain-relieved without cutting the fiber and buffer tubes. It is used in applications where only a few fibers from a feeder cable will be spliced in the closure while other fibers and the relevant midspan will pass through the closure.

  • What is a breathable closure?

    A breathable closure is a fiber closure used above grade (pole/façade or strand mount). It offers the appropriate weather protection (rain, pressurized water, dust) while providing the possibility to eliminate internal condensation through venting ports. Breathable closures cannot be used below grade.

  • What is a single-fusion splice?

    A single-fusion splice is a fusion splice of two fibers together. The result is an optical continuity between these two fibers. The splice is protected inside a splice protection sleeve.

  • What is a mass fusion splice?

    A mass fusion splice is the splice of more than two optical fiber ribbons of the same size together. Typical mass fusion splices have four, eight, or 12 fibers, with 12 being the most common.

What can Corning do for You? Contact us to discuss your closure needs.

Have a question about closures?  Curious what closure best fits your cabling needs?  Contact us so we can help you optimize you solutions.

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