DOME Fiber Closure Manufacturer Greentel Offer 3 Types Closure


As you konw, greentelftth is a professional DOME Fiber Closure manufacturer, we offer high-quality and different types of closure. So you need to konw the types of greentel closure before you purchasing it from

Basic Closures

At its simplest, a closure joins one length of fiber cable to a different length of the same type of cable. This is sometimes known as in-line closure or track joint. Added functionality is provided by a spur (or branch) joint which divides the cable into two ongoing parts - the main cable and a side or spur cable. There are also end of route closures where the cable is broken out into individual elements for customer or telco connection.

The earliest fiber closures were direct descendants of their copper cousins. The simplest in construction (but not to use!) were wrap-around heat-shrink products, most usually just in-line closures but sometimes branch joints. Although they could be made water resistant they had few other benefits (except low cost) and often required a skilled jointer to apply them.

Tube Distribution Closures

With the widespread adoption of blown fiber and cable systems which use multiple microduct bundles, tube distribution closures have become prevalent. As the name suggests these either create an in-line microduct track joint or, more commonly, branch off individual microducts to different destinations. Instead of fiber jointing occurring in the closure, individual microducts are joined together by purpose-made push fit connectors that in themselves are designed to be water tight. This has enabled the closure to be of simple design, without the need for expensive seals and is easily assembled in the field.

Dome Fiber Closures

Probably the most common type of closure is now the ‘dome’ closure, which comprises a base with cable port inlets, a stack of splice trays and a removable dome cover. The advantages are:

The format is easily sealed to IP68, yet the dome can be removed in seconds for re-entry.

Many configurations of base can be produced within the same overall footprint

By using different domes closures can be expanded to add in more splice trays.

However, having a robust outer casing is only half the challenge. The other 50% is to contain and organize the fiber-to-fiber jointing function. In general, optical fiber cables are comprised of cable ‘elements’ (commonly loose tubes or ribbons). So a 144 fiber cable comprises twelve 12-fiber ribbons or twelve 12-fiber loose tubes. A ‘single element’ splice tray therefore houses an entire cable element’s worth of fibers. This arrangement is well suited to in-line (track) closures. The fibers are stored for long term survivability with no expectation that the closure is an intentional point of intervention. However, for branch (spur) there is often the intention to go back to the closure repeatedly to add, subtract or re-route individual circuits. Then it is beneficial to store a ‘single circuit’ on one splice tray. Using this approach individual customers can be connected without disturbing existing circuits.

Maybe you can tell us what your need, we will recommend the suitable fiber closure for you as soon as possible.