ZyXEL Communications PLA-470 V2 - V3.0.5 Guía de instalación descargar pdf (Pagina 239)

offered by Internet access providers from anywhere in an installation, requires

devices with a throughput around 200 Mbit/s at the physical layer level, which is the

case of HomePlug AV devices.

Insofar as all HomePlug devices are compatible between themselves for 1.0 and

Turbo, various HomePlug products suited for the following uses will nonetheless

coexist for some time.

•

HomePlug 1.0: Web navigation, electronic mail;

•

HomePlug Turbo: Internet, IP telephony, data (exchange of bulky files),

images (IPTV or MPEG-2 or MPEG-4 video on demand);

•

HomePlug AV: digital HD video in the IP format (high-definition MPEG-2,

for example) broadcast to several display stations.

Placing Devices on the Electrical Network

To achieve a network quality and performance enabling the broadcasting of Internet

flows (voice, data, IPRV), it is important to place the PLC devices as efficiently as

possible on the electrical network according to the following criteria:

•

Topology of the installation’s electrical network;

•

Place of IP terminals and PC supposedly connected to the flows coming from

the Internet modem.

The following place is ideal for PLC devices:

•

Close to the circuit breaker panel from which the various electrical wirings

supplying the outlets, electrical devices, and the lights of the house start.

•

Close to the Internet modem connected to the public STN (switched telecom-

munications network) on the voice jack.

Figure 10.3 illustrates a regular domestic installation wiring diagram with

Internet access. The PLC devices are placed on the outlets located close to the voice

jack connecting the house to the Internet.

In such an installation, three PLC devices can be used for receiving the Internet

flow with a satisfactory coverage:

•

A gateway PLC device connected to the Ethernet jack of the Internet modem

and to outlet 1;

•

A PLC device for fixed PC (outlet 3) which can be on the same electrical

wiring;

•

A PLC device for portable PC (outlet 5 or 6), which can be placed on a differ-

ent floor to provide domestic installation mobility.

This network configuration with three devices is the most widespread in a

domestic environment. An increasing number of homes are equipped with at least

two computers and a high speed Internet connection of the InternetBox type.

220 PLC in the Home

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