ZyXEL Communications ES-2024 Series manual 41

			Chapter 3 Hardware Overview
Table 2 LEDs (continued)
LED	COLOR	STATUS	DESCRIPTION
SYS	Green	Blinking	The system is rebooting and performing self-diagnostic tests.
		On	The system is on and functioning properly.
		Off	The power is off or the system is not ready/malfunctioning.
ALM	Red	On	There is a hardware failure.
		Off	The system is functioning normally.
Ethernet Ports
LNK/ACT	Amber	Blinking	The system is transmitting/receiving to/from a 10/100 Mbps
			Ethernet network.
		On	The link to a 10/100 Mbps Ethernet network is up.
		Off	The link to an Ethernet network is down.
FDX/COL	Amber	Blinking	The Ethernet port is negotiating in half-duplex mode and
(ES-			collisions are occurring; the more collisions that occur the faster
2024A)			the LED blinks.
		On	The Ethernet port is negotiating in full-duplex mode.
		Off	The Ethernet port is negotiating in half-duplex mode and no
			collisions are occurring.
POE	Amber	On	Power is supplied to the port.
(ES-
		Off	Power is not supplied to the port.
2024PWR)
Gigabit Ports
100/1000	Green	On	The link to a 1000 Mbps Ethernet network is up.
	Amber	On	The link to a 100 Mbps Ethernet network is up.
		Off	The link to an Ethernet network is down.
ACT	Green	Blinking	The port is receiving or transmitting data.
		On	The port has a connection to an Ethernet network but not
			receiving or transmitting data.
		Off	The link to an Ethernet network is down.
Mini-GBIC Ports
LNK	Green	On	The port has a successful connection.
		Off	No Ethernet device is connected to this port.
ACT	Green	Blinking	The port is sending or receiving data.
		Off	The port is not sending or receiving data.

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ES-2024 Series User’s Guide