Intel 100BASE-TX manual MDI/MDI-XSwitch, LED Matrix

C H A P T E R 1 Overview

The maximum cable distance between the port and the attached device is 100 meters (328 feet), including all patch cables, panels, and connectors.

MDI/MDI-X Switch

The MDI/MDI-X switch on the front panel of the Express hub is a recessed push-button switch that allows you to select MDI or MDI-X wiring for port 1. As indicated on the front panel, port 1 is configured for MDI-X wiring when the push button is in the out position. When the push button is pressed in, port 1 is configured for MDI wiring.

The MDI/MDI-X switch eliminates the need to use a crossover cable if you are connecting similar devices. Use the following guidelines to configure port 1 for MDI or MDI-X wiring:

∙Configure port 1 for MDI-X wiring if the remote end of the cable is connecting to an MDI-wired device (such as a network station or a router).

∙Configure port 1 for MDI wiring if the remote end of the cable is connecting to an MDI-X device, such as a 10/100 Mbps switch.

MDI-X ports 2 through 12 cannot be configured for MDI wiring. If you are using one of these ports to connect to another MDI-X port, you must use an RJ-45 crossover cable to connect the two ports.

LED Matrix

The LED matrix on the front panel of the Express hub allows you to identify:

∙The status of the hub AC power supply.

∙The operational status of the hub.

∙A collision occurrence on an Ethernet segment in a standalone hub or a stack of hubs.

∙The network utilization of the Ethernet segment in a standalone hub or a stack of hubs.

∙The status of the expansion module or the status and mode of a network management module (NMM) installed in the expansion slot.

∙The status for all ports in the hub, including port 1 on the optional media adapter when installed in the media adapter slot.

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