3Com 3CBLSF26H manual LED Status Indicators, Status Description, Off

Figure 1-3Baseline Switch 2250-SFP Plus 50-Port—front panel.

LED Status Indicators

The Switch provides LED indicators on the front panel for your convenience to monitor the switch. Table 1-2describes the meanings of the LEDs.

Table 1-2Description on the LEDs of the Switch

LED		Status		Description
				The switch starts normally. The LED flashes
		Green		when the system is performing Power-On
Power				Self-Test (POST).
		Yellow		The system has failed the POST.
		OFF	The switch is powered off.
Link/Activity				The port works at the rate of 100 Mbps; the
		Green		LED flashes quickly when the port is sending
				or receiving data.
				The port works at the rate of 10 Mbps; the
		Yellow		LED flashes quickly when the port is sending
				or receiving data.
				The link has not been established, either
	10/100BASE-T			nothing is connected to the port, or there is a
	port			problem:
				z Check that the attached device is powered
		OFF		on.
				z Check that the cable is the correct type
				and is not faulty.
				If these checks do not identify the cause of the
				problem, it may be that the unit or the device
				connected to the port is faulty. Contact your
				supplier for further advice.
	10/100/1000BAS			The port works at the rate of 1000 Mbps; the
		Green		LED flashes quickly when the port is sending
	E-T port
				or receiving data.
				The port works at the rate of 10/100 Mbps; the
		Yellow		LED flashes quickly when the port is sending
				or receiving data.

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