This blog post is part of a series called “CommScope Definitions,” in which we will explain common terms in communications network infrastructure.
today’s fiber world, multiple service operators demand more bandwidth for their
subscribers. Their engineers require innovations that make it easier and more
cost-effective for them to build
critical fiber connections for delivering
gigabit access speeds. One way engineers can accomplish this is by
deploying a fiber distribution hub. So,
what is that?
distribution hub (FDH) is an enclosure that provides the
connection between fiber optic cables and passive optical splitters in the outside plant segment of the network. It makes it easy and fast
to service connections and reconfigurations, and serves as a testing point in the outside plant
network. If a cabinet is equipped with factory-preconnectorized feeder and distribution cable stubs, it helps ensure a
quick, easy and reliable field installation. Fiber distribution hubs vary
in size and shape depending on the location in the network and the number of
customers needing service.
available technology in the early years of fiber-to-the-home
(FTTH) constrained manufacturers to large metal cabinets. Placing a cabinet
on the ground in the utility easement met with little objection from either the
carrier or the homeowners. Placing cabinets on concrete pads or utility poles
was common practice. The story today is much different. Permitting
restrictions, vandalism and security are at the forefront of cabinet placement
FDHs are more space and cost conscious. The markets demand higher subscriber
counts, a smaller footprint and a solution for permit restrictions on above
ground utility equipment. CommScope recognized this need many years ago and
designed the first below-grade FDH capable of serving up to 72 subscribers.
Recent innovations now allow for 288
subscribers in the same footprint as the original 72-port model. When
above-ground cabinets are allowed, CommScope has offerings from 48 to 864
in different shapes and sizes depending on their placement in the network.
There are indoor and outdoor FDHs. In the outdoor environment, there are more
choices depending on application and number of customers requiring service. Often
times more than one design will meet the carrier’s requirements, so it important
to work with a trusted advisor to determine which is best for your specific
Fiber Distribution Hubs provide the
connection between fiber optic cables and passive optical splitters in the
outside plant segment of the network. A
good FDH provides high-density fiber connectivity to a compact, weatherproof
enclosure to meet increasingly restrictive permitting ordinances.