3Com manual 2 Hub 1000 SX Indicators, Color, Status, Meaning

2-6CHAPTER 2: INSTALLING THE HUB

Table 2-2Hub 1000 SX Indicators

100					PORT STATUS						SUPER
											STACK
	ACTIVITY								OVERTEMP	RPS ON	UNIT
50											STATUS
	LINK								PWR	RPS FAIL	PAUSE
	1	2	3	4	5	6	7	8	9
10											SuperStack II
% BW USAGE											HUB 1000 SX

Indicator	Color	Status	Meaning
% BW usage meter	Green	Fluctuating	The meter indicates the percentage of bandwidth that the
			hub is using. Because the hub can be connected to multiple
			network segments, this meter represents the aggregate
			load on the hub.
PORT STATUS LEDs			LEDs 1 through 8 show the status of the downlinks. LED 9
			shows the status of the uplink.
ACTIVITY	Green	ON	The port is receiving data.
		OFF	The port is not receiving data.
LINK	Green	ON	A connection exists between the port and the end node.
		OFF	There is no connection between the port and the end node.
Hub operation LEDs
OVERTEMP	Amber	ON	The internal temperature exceeds 158 °F (70 °C).
RPS ON	Green	ON	The Advanced RPS is connected and turned on.
UNIT STATUS	Amber	ON	The hub is performing POST diagnostics. If the amber LED
			remains lit for longer than 30 seconds, POST has failed or
			the CPU has halted.
		Flashing	An error has occurred.
	Green	ON	The hub is operating normally.
		Flashing	A firmware update is proceeding.
	Amber/Green	Flashing	A firmware update error occurred. See “Troubleshooting”
			in Appendix A.
PWR	Green	ON	The hub is receiving power.
RPS FAIL	Amber	ON	The Advanced RPS is connected, but a failure
			condition exists.
PAUSE	Green	ON	The uplink port has received a pause frame. For an
			explanation of pause frames, see “Flow Control” in
			Chapter 1.