3Com 2816-SFP Plus (3C16485), DUA 1648-5AAA02 manual Rear Panel Features, Status Meaning

4 Module Active LEDs

The Module Active LEDs shows the status of any SFP modules that are installed.

Status	Meaning
Green	Fiber SFP is inserted in the slot.
Off	No fiber SFP is inserted in the slot.

5 Port Duplex LEDs

The second and fourth (bottom) row of Status LEDs, which are colored yellow, show the duplex status of the related ports.

Status	Meaning
Off	No link, not yet negotiated or the port is operating in
	half-duplex mode.
Yellow	The port is operating in full-duplex mode.

6 Power LED

The Power LED shows the power status of the Switch:

Status	Meaning
Green	The unit is powered on and ready for use.
Off	■	The unit is not receiving power:
	■	Check that the power cord is connected correctly.
	■	If the unit still does not operate, contact your supplier.

Status Meaning

Flashing ■ Power-on self test is in progress.

Green

Yellow ■ Power-on self test or loopback test failed. Switch is in fail- safe mode.

7 Self-adhesive Pads

The unit is supplied with four self-adhesive rubber pads.

Do not apply the pads if you intend to rack mount the unit.

If the unit is to be part of a free-standing stack, apply the pads to each marked corner area on the underside of the unit. Place the unit on top of the lower unit, ensuring that the pads locate with the recesses of the lower unit.

Rear Panel Features

8 Power Supply

The Switch automatically adjusts to the supply voltage. Only use the power cord that is supplied with the unit.

9 Recovery button

The recovery button reinitializes the Switch. This returns the Switch to the factory default settings if, for example, you have forgotten the default IP address, or forgotten your user name or password.

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