ZyXEL Communications PLA-470 V2 - V3.0.5 Guía de instalación descargar pdf (Pagina 325)

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Open-endedness, removal requirements, temporary networks, test networks,

and so forth;

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User groups and requirements of specific logical networks;

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Easy network deployment, configuration, and global supervision.

It is essential to specify these characteristics to build a network architecture that

is both efficient and stable in time.

In the same manner as we have made a table in which the advantages and disad-

vantages of the various network technologies are compared, the optimum utilization

conditions of each of these technologies are detailed in Table 13.3.

Example of an Optimized Architecture

We are going to take the example of the computer network of an installation with

two buildings already fitted with private telephone lines starting from a local PABX

to connect the two buildings.

Since these are multistory buildings, we want to implement user mobility in each

room and between the two buildings. We assume that the rising mains are accessible

and that they allow the passage of additional cables and easy installation of network

devices.

A good knowledge of the electrical network of each story and of the entire build-

ing, if this is possible, is necessary for the installation of the PLC devices.

To satisfy these requirements and comply with these specifications, the hybrid

architecture illustrated in Figure 13.12 consists of the following elements:

306 Hybrid PLC

Table 13.3 Optimum Utilization Conditions of Network Technologies

NETWORK

TECHNOLOGY

OPTIMUM UTILIZATION CONDITION

Ethernet cable –Easy raceway (rising mains, other expected

–work, power supply by PoE, and so forth)

–Optimum network architecture (star, ring,

branches, and so forth)

Wi-Fi –Efficient radio coverage

–Good handover management between cells

–Good security management

Cable TV –Easy raceway

–Easy existing medium access

Optical fiber –Easy raceway

–Active devices optimizing multiplexing

–Good choice of optical mode and wavelengths

PLC –Good knowledge of the electrical network

–Hybrid network with wired backbone

Telephone cable –Possibility to place devices close to PABX

–Available point-to-point links

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