ZyXEL Communications PLA-470 V2 - V3.0.5 Guía de instalación descargar pdf (Pagina 297)

and the PLC infrastructure in collaboration with the operational teams of the local

electrical utility.

The prime contractor team consists of electrical engineers for compliance with

the safety rules and of telecom/network engineers for the use of the electrical infra-

structure and the implementation of Internet services satisfying the residents’

requirements.

PLC’s Position Within the Network Architecture

The telecommunications networks can be considered as a large pyramid of networks

comprising the following subnets (from top to bottom):

•

Very large networks. Ensure very high throughput connections between towns

and continents, usually using optical fiber, like Ebone or Europanet in Europe,

Eassy for East Africa, SAT-3/WASC for the western part, and SEA-ME-WE-3

(from North Africa to India). Such network types cannot be built using PLC

technologies.

•

Inter-POP backbones. Connect the various very high throughput IP points of

presence to the DataCenters of large cities. These optical fiber networks can be

located between cities or in built-up areas. These backbones connect the points

of presence to the exchanges (telephone exchange, cable TV, Satellite, WiMax,

BLR, mesh, and so forth) of the Internet access providers. For the time being,

PLC technologies cannot be used for building this type of network, but the

throughputs provided by HomePlug AV and HomePlug BPL can be used for

forming parts of this type of network in some cases.

278 PLC for Communities

Figure 12.7 Example of a power line distribution system for a community

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ZyXEL Communications PLA-470 V2 - V3.0.5 Guía de instalación Pagina 297