Allied Telesis AT-9408LC/SP, AT-9424T/POE manual 10/100/1000Base- T Twisted Pair Port LEDs

AT-9400 Series Gigabit Ethernet Switches Installation Guide

Port LEDs

The following sections describe the twisted pair and fiber optic port LEDs.

10/100/1000Base- T Twisted Pair Port LEDs

A twisted pair port has two LEDs labeled L/A (link/activity) and D/C (duplex mode/collisions). The L/A LED indicates the speed and activity on a port. The D/C LED indicates the duplex mode (full- or half-duplex) and the status of collisions on the port.

Table 3 describes the LEDs for the 10/100/1000Base-T twisted pair ports.

Table 3 Twisted Pair Port LEDs

LED	Function	State	Description
L/A	Link Status	Off	No link is established between the
	and Activity		port and the end node.
		Solid	The port has established a link at
		green	1000 Mbps.
		Flashing	Packets are being received or
		green	transmitted at 1000 Mbps.
		Solid	The port has established a link at 10
		amber	or 100 Mbps.
		Flashing	Packets are being received or
		amber	transmitted at 10 or 100 Mbps.
D/C	Duplex	Green	The port is operating in full-duplex
	Mode and		mode.
	Collisions
		Amber	The port is operating in half-duplex
			mode. (Only when operating at 10 or
			100 Mbps.)
		Flashing	Collisions are occurring on the port.
		amber	(Only when operating at 10 or 100
			Mbps, half duplex mode.)

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