ZyXEL Communications PLA-470 V2 - V3.0.5 Instalační příručka stáhnout pdf (Strana 285)

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Hotel Story PLC Networks

The hotel proposes to the customers to connect to the Internet in their bedrooms via

a lent PLC device to be connected to the bedroom outlets. This connection to the

Internet must take place in an authenticated, secured, and confidential manner. The

PLC devices available at the hotel reception are, therefore, preconfigured so that

they can connect to the PLC story network.

The technical problem raised is that HomePlug 1.0 and Turbo specify a limit of

15 devices for each PLC network behind a PLC gateway. Figure 11.15 illustrates the

drawing of a story with more than 15 PLC devices that are potentially connectable

to the hotel bedrooms corporate network with 22 bedrooms. The PLC signal is fed

either by injection from the circuit breaker panel of the building or by pulling an

Ethernet cable at each story and including a PLC gateway for each story if the dis-

tance is too high.

By using AsokaUSA 8950 products, PLC network extensions beyond the 15

device limit can be added with the creation of “segments,” i.e., PLC areas with 15

266 PLC for Businesses

Figure 11.14 Overall logical architecture of the hotel PLC networks

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