3Com 4210G manual Seven-Segment LED, Status, System status Seven-segment LED Description

Table 1-9Port mode LED description

LED	Status	Description
	Steady green	Indicates port rate.
Mode	Flashing green (1 Hz) (supported by	Indicates port PoE power supply.
	PoE switches only)
	Steady yellow	Indicates port duplex mode.

Seven-Segment LED

The seven-segment LED and the system status LED together indicate the operating status of the device. For details, refer to Table 1-10.

Table 1-10Seven-segment LED description (1)

		Status
LED	System status	Seven-segment LED	Description
	LED (PWR)
		The LED displays the specific numbers
Unit	Flashing green	one by one.	POST running. The LED
			displays the POST test ID.
		The LED flashes the specific numbers.	POST failed. The LED flashes
	Flashing red		the POST test ID of the failed
			test.
		A bar rotates clockwise around the
	Flashing green	LED.	Software loading
		The LED flashes F.
	Steady red		Fan failure
		The LED flashes t.
	Steady red		Over-temperature alarm
		The LED displays C.	The current switch is the
	Steady green
			command switch in the cluster.
		The LED displays S.	The current switch is a member
			switch in the cluster.
		The LED displays c.	The current switch is a
			candidate switch in the cluster.

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