ZyXEL Communications PLA-470 V2 - V3.0.5 Guía de instalación descargar pdf (Pagina 126)

CHAPTER 6

Applications

Many prospective studies show that, in a few years from now, Ninety percent of the

networked terminals will not be computers. This prospect shows that many electri-

cal and electronic devices of any type in many fields (industry, hospitals, home auto-

mation, electronics, digital arts, and so forth) will be fitted with an RJ-45 network

interface used for connecting to a local area Ethernet network.

The last few years have witnessed the predominance of two major standards on

networks—Ethernet and IP. From these observations, it is logical to think that the

communication networks between devices will mainly develop over the most conve-

nient and reliable communication media. From this perspective, PLCs will undoubt-

edly be major players due to the extent of the electrical network (outlet networks,

light network, and so forth) to provide the various devices with the most recent

functionalities of networked communications.

The PLC networks bring about new advantages for the network world; the

most important one is undoubtedly how easy it is to use, since the user just has to

use the outlets of the building to build a computer network.

Once installed, this network provides sufficient data rates for real-time and

multimedia applications. In addition, it can act as the backbone of a Wi-Fi network.

The PLC network then ideally completes Wi-Fi; this makes it possible to extend its

coverage and to obtain the best offered by this technology.

Voice, Video, and Multimedia

Voice and video are real-time applications that are not easily implemented in asyn-

chronous networks such as PLC. However, they probably represent a part of the

future of these networks as an extension of the telephone application.

In 2005, the conventional telephony around PABX and its distribution to tele-

phone sets started to be replaced by telephony over IP in a PLC environment. Now,

since the beginning of 2007, PLC networks have been broadcasting television chan-

nels and handling videoconferencing applications between users. As for the multi-

media application, it has rapidly become a major criterion for choosing PLC

technology, in particular among companies.

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ZyXEL Communications PLA-470 V2 - V3.0.5 Guía de instalación Pagina 126