Key Biscayne Master Plan 043944000.18w_Key_Biscayne_MP(forJooMag) | Page 23
3.0 EXISTING UTILITY SYSTEM OVERVIEW
line then jogs west and turns south down the Fernwood Road corridor.
From that corridor moving south it generally branches out to the east and
the west to feed the various optical nodes.
To better understand how cable television is delivered to individual homes
and businesses, the following is a brief overview of the various components
of the existing cable television and communications system that exists
within the Village. Cable television and communications service enters
the Village through the main fiber optic cable described above. This cable
then branches off to subsequent fiber optic cables that serve individual
fiber nodes providing service to many distinct service areas throughout the
Village. The fiber optic cables that serve these nodes exists on the main
north-south arterial road, such as Fernwood Road. The nodes provide a
transition from fiber optic service to coaxial cable service. Branching from
these nodes are the main coaxial distribution cables. The coaxial distribution
cables are routed to numerous amplifiers, aerial taps and ground mounted
pedestals that provide the individual coaxial services to the customers. The
main coaxial distribution cables and individual service cables are generally
those wires that are located in the rear yard easements although they are
also co-located with the fiber optic cable on some of the overhead lines.
The following table provides general approximate information related to
Comcast’s network within the Village based on maps provided by Comcast
and observations made by Kimley-Horn:
Table 3–2 — Comcast Network Information
Length of Overhead Fiber Trunk Lines 9 miles
Length of Overhead Coaxial Trunk Lines 16 miles
Length of Underground Fiber Trunk Lines 2 miles
Length of Underground Coaxial Trunk Lines 13 miles
Number of Fiber Nodes 18
Number of Power Supplies 20
3.4
Overhead Infrastructure – AT&T
AT&T provides the Village with telephone and
communications service through a mix of overhead
and underground backbone copper trunk lines
that then transition to service lines to the building.
AT&T does not keep records of the total length of cable they have installed
in the Village. The system is very mature and most of it was constructed in
the early 1960’s. The network is fed by one main copper feed. Similar to
Comcast, the one main feed is an underground duct bank that originates
north of the Village’s northern municipal limits. Through a series of
manholes, this underground duct continues south along Crandon Boulevard
with a secondary route down Fernwood Road. These ducts then converge
on AT&T’s main distribution building on Westwood Drive. It then heads west
on Westwood to feed the southern portion of the Village. From this corridor
moving south then west, lines generally branch out east and west and then
north and south to feed the Village.
To better understand how telephone service is delivered to individual homes
and businesses, the following is a brief overview of the various components
of the existing telephone and communications system that exists within the
Village. Telephone and communications service enters the Village through
one main copper cables described above. This cable then branches off to
subsequent copper cables that serve a network of Service Area Interface
(SAI) cabinets and Controlled Environment Vaults (CEV) that provide service
to many distinct service areas throughout the Village. A significant portion
of the main trunk line is already underground with radial splices occurring in
manholes along the route. Many of the radials then transition to overhead
locations to serve area customers. The copper cable main lines are routed
to numerous aerial taps and ground mounted pedestals that serve as the
tapping point for individual copper services to the customers.
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