Cabletron Systems RoamAbout Guia de Instalação descarregar pdf (Página 27)

Cabling and Wiring 2-9

CAT 5 Cabling Standards

Straight-Through Configuration

Use a straight-through wiring configuration if connecting:

• An Ethernet switching device to an Access Point.

• An Access Point to a remote power adapter.

Crossover Configuration

Use a crossover wiring configuration if connecting:

• An Access Point to an Access Point.

• An Access Point to an Ethernet card in a PC.

CAT 5 Cabling Standards

There are four common CAT 5 Cabling Standards. Three of these, EIA 568A, EIA 568B,

and EIA 356A are recommended for RoamAbout Access Point 2000 installations. The

fourth standard, USOC, has advantages when dealing with telephone wiring but is strongly

not recommended for use in data applications.

• If new wiring is installed for the Access Point, it is extremely important to know which

standard was used to install the existing wiring.

• It is also important that new wiring complies with and is tested to CAT 5 Cabling

Standards. Miswiring of data pairs can result in a faulty Ethernet connection.

Miswiring of power pairs could blow a fuse in the North American power supply.

Crossing data and power wiring pairs could also result in a blown fuse.

• In the event of data or power miswiring when using RoamAbout power supplies, the

North American power supply can blow a fuse and the International Power supply

folds back. In either case, the Access Point is not damaged but the North American

Power Supply may have to be replaced.

• If you are not using a RoamAbout power supply, miswiring of data or power may

damage the Access Point. Again, use care when installing the wiring for the Remote

Power feature.

All CAT 5 information presented here also applies to CAT 3.

NOTE

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