Allied Telesis AT-MC103XL LEDs, Color State Description, MDI/MDI-X Switch, NML/LNK TST Switch

Installation Guide

LEDs

The PWR LED in the upper right corner of the front panel lights when the media converter is receiving power. Status LEDs are located on the front panel next to each port and described in Table 1.

			Table 1 LEDs
LED	Color	State		Description
PWR	Green	ON		Power is applied.
NML	Green	ON		Unit is operating in normal mode.
		OFF		Unit is in Link Test mode.
REC	Green	ON		Data is being received on the port.
LNK	Green	ON		Link established on the port.

MDI/MDI-X Switch

The MDI/MDI-X (Media Dependent Interface/Media Dependent Interface with Crossover) switch, located on the front panel, is a straight-through or crossover cable selection switch. It enables the RJ45 port to be connected to a repeater or DTE device without using a special crossover cable. The default position of the switch is MDI-X, which means you can connect the RJ45 port to a workstation or to any other DTE device using a straight-through cable.

NML/LNK TST Switch

The NML/LNK TST (Normal/Link Test) switch, located on the front panel, establishes a fiber/twisted pair link in the test position.

The default position of the switch is IN, which is the normal (NML) operating mode and enables the MissingLink feature. With the switch in the OUT or Link Test mode (LNK TST) position, the MissingLink feature is disabled and the optical transmitter TX is forced on. The NML LED lights when the NML/ TST LNK switch is in the default (IN) operating position.

Note

Using the Link Test mode does not interfere with the media converter’s ability to pass network traffic.

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