ZyXEL Communications PLA-470 V2 - V3.0.5 Przewodnik Instalacji Pobierz pdf (Strona 254)

This protection technique based on PPPoE tunnels is widely used by Internet

access providers to ensure the separation between the various Internet access clients

but it can be applied to a PLC home or professional network as well.

Configuring an Internet Gateway

In a PLC network, any Internet connection may be used: 56K modem, ISDN, cable,

ADSL, ADSL2+, satellite, or FTTH (fiber to the home). Since the transmission speed

of a PLC network is between 1 and 14 Mbit/s for HomePlug 1.0, 1 to 85 Mbit/s for

HomePlug Turbo, and 1- to 200 Mbit/s for HomePlug AV, the throughputs of the

Internet connections currently available are largely covered.

The HomePlug 1.0 performance can generate useful throughputs that are lower

than those of the latest ADSL technologies such as ADSL2+ (20 Mbit/s); but as soon

as you switch to HomePlug Turbo (25 Mbit/s), this is no longer a problem.

The Internet connection can occur in two different ways:

•

By using a dedicated computer, or by connecting the PLC device directly to

the modem for access to the Internet or InternetBox;

•

By using a PLC modem-router directly.

In the first case, a computer shares its connection, as illustrated in Figure 10.20.

Figure 10.21 illustrates a PLC home network in which a multifunction device

(xDSL/PLC modem/router) is connected to the Internet.

Configuring an Internet Gateway 235

Figure 10.19 PLC network with gateway protected by PPPoE and RADIUS servers

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ZyXEL Communications PLA-470 V2 - V3.0.5 Przewodnik Instalacji Strona 254