ZyXEL Communications PLA-470 V2 - V3.0.5 Installationsanleitung PDF herunterladen (Seite 240)

Figure 10.4 illustrates the same home network with all the devices installed for

the broadcasting of the various Internet flows to the outlets of the electrical net-

work.

The PLC device located on outlet 3 is used by the computer for connecting to the

Internet via the outlets (outlet 3 to outlet 1). Therefore, it is important to find a satis-

factory compromise between the desired throughput, the position of the PC in the

house, and the quality of the PLC communication links between outlet 3 and outlet 1.

With HomePlug Turbo devices, an outlet with a throughput between 12 Mbit/s

and 75 Mbit/s should be found using PLC configuration tools (such as the Intellon

Power Packet Utility described in Chapter 9), which is generally the case of outlets

located on the same floor in adjacent rooms.

The PLC device located on outlet 5 is used by the TV decoder for connecting to

the InternetBox via the electrical network and recovering the video streams from the

Internet connection. These video streams require a minimum stable 1-Mbit/s useful

throughput for fluid TV display. It is important not to degrade the video signal too

much on the electrical network so as not to lose images. This constraint supposes

that the PLC communication link between outlet 5 and outlet 1 provides a

1.5-Mbit/s useful throughput. This throughput can be checked using a PLC configu-

ration tool. The involved device must be connected directly to a wall outlet or a

biplite, but not to a power strip.

Table 10.2 lists, for a HomePlug Turbo device, the correspondences between

the throughputs displayed by the configuration tool and the useful throughputs

Placing Devices on the Electrical Network 221

Figure 10.3 Regular wiring diagram for a domestic installation with Internet access

1 2 ... 235 236 237 238 239 240 241 242 243 244 245 ... 348 349

Keine Kommentare

ZyXEL Communications PLA-470 V2 - V3.0.5 Installationsanleitung Seite 240