Page 246 - Shaping smarter and more sustainable cities - Striving for sustainable development goals

Figure 20 – Communication layer

2.1.2.1 Transport networks
The convergence of infrastructure already introduced earlier should be considered carefully for this
type of transport of data networks in urban environments.

To transport the large amount of data that handled the smart sustainable cities will be necessary
for local governments to implement national policies for the deployment broadband networks.
Optical Transport

Fiber is the optimum physical medium to transmit large amounts of data over long distances. The
bandwidth‐over‐distance capabilities of fiber by far exceed those of any other medium such as
copper or wireless technologies. Fiber‐optic transport is therefore the unchallenged foundation for
all high‐speed networks.

Figure 21 – Fiber optic networks worldwide

236 ITU‐T's Technical Reports and Specifications