Allied-telesis AT-FS202SC/FS1 Manuel d'utilisateur télécharger pdf (Page 20)

Chapter 1: Overview

Auto MDI/MDI-X

An RJ-45 twisted pair port on a 10 Mbps or 100 Mbps Ethernet network

device can have one of two possible wiring configurations: MDI or MDI-X.

The RJ-45 port on a PC, router, or bridge is typically wired as MDI, while

the twisted pair port on a converter or hub is usually MDI-X.

When the twisted pair port on the AT-FS201, AT-FS202, and

AT-FS202SC/FS1 converters is set to Auto-Negotiation, the port features

automatic MDI/MDI-X. The RJ-45 port automatically determines the

configuration of the port on the end-node and then configures itself

appropriately. This feature allows you to use either a straight-through or

crossover cable when connecting an end-node to the twisted pair port.

When the port on the AT-FS201, AT-FS202, and AT-FS202SC/FS1

converter is not set to Auto-Negotiation, the port defaults to MDI-X. To

connect to an end-node that has the same wiring configuration, such as

MDI-X to MDI-X, you would use a crossover twisted pair cable. To

connect to an end-node that has different port wiring configuration, such

as MDI to MDI-X, you would use a straight-through cable.

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Allied-telesis AT-FS202SC/FS1 Manuel d'utilisateur Page 20