Key Biscayne Master Plan 043944000.18w_Key_Biscayne_MP(forJooMag) | Page 49

5.0 DESIGN CRITERIA AND CONCEPTUAL DESIGN DESCRIPTION
fiber network. To avoid an additional cost to convert “like for like” services
plus FTTP services, AT&T will need to convince all its Legacy customers
to discontinue their old services and upgrade to a newer technology.
Additionally, AT&T sells its Legacy services to third party resellers who
may be unwilling to part with their ongoing customer contracts. This issue
also prevents pole removal since FPL would then top poles and AT&T
would be responsible for removal at an additional cost to the program.
AT&T engineers and planners are aware of these issues and are working
internally to facilitate an FTTP upgrade.

1. a power supply cabinet,
2. a Virtual Hub (VHub) Node Housing,
3. a Local Convergence Point (LCP)
that serves as the Fiber Distribution Hub (FDH). For a hybrid fiber/
coaxial system, the LCP would not be used.
 Comcast prefers that the power supply, VHub, and LCP are located
in a common 10'x10' easement. This equipment can also be
located in the public right-of-way as long as the required roadway
clearances are met. The power supply can be separated from the
LCP and VHub by a maximum of 800 feet. However, separating the
equipment increases cost due to the additional conduit required to
connect all three pieces of equipment.
 The power supply cabinet requires a 120V, single phase metered
service from FPL.
Until AT&T’s contractual issues are resolved, this master plan contemplates
the implementation of a “like for like” overhead to underground conversion.
5.3.3
Comcast
Comcast provides communications service to the Village through a
network of fiber optic and coaxial cables. The fiber optic trunk line exists in
an aerial pole to pole location. Distribution to most homes and businesses
is through overhead to underground transitions at the overhead radial
line locations. Comcast has offered to upgrade their service to the Village
through installation of a FTTP system. However, the cost of this upgrade
would have to be borne by the Village. Therefore, this master plan
contemplates installation of a “like for like” fiber optic/coaxial cable system
similar to the current one, except all cabling would be underground.
Each fiber node location is supported by three pieces of
equipment:
Comcast will be performing the communications network design for the
program with Kimley-Horn developing the supplemental conduit plans
to aid the Village’s contractor for installing the conduit necessary for the
Comcast network. Comcast has provided the following general guidelines
related to the design of the improvements.
 Main underground fiber optic trunk lines and power source
equipment can be reused if practical. Reuse of power sources shall
be evaluated during the design phase since this will require a power
source to serve both the new network and existing network during
the cut over phase. This may overload the power source if sufficient
power is not available to serve both networks simultaneously.
 One fiber node can accommodate a maximum of 256 connections.
Fiber node service areas should be designed with less than 256
connections to provide room for future growth.
Existing pad-mounted transformer with communications pedestals
in the background
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