3Com DUA1771-0AAA01 Installing the Module into a Switch, Removing the Module from a Switch, LEDs

INSTALLATION AND REMOVAL

Installing the Module into a Switch

CAUTION: This Module is not hot-insertable or hot-swappable. Always make sure that the Switch is powered down and disconnected from the mains before installing or removing a Module. Use the following instructions when installing or removing a Module.

CAUTION: This Module is only designed to work with the 3Com SuperStack 3 Switch 4900 series.

To install the Module:

1Ensure that the Switch is disconnected from the mains power supply and that you are wearing an anti-static wristband connected to a suitable earth point.

2Place the Switch on a flat surface. Using a suitable screwdriver, remove the blanking plate from the rear of the Switch. Do not remove any other screws from the rear of the Switch.

3Keep the blanking plate and screws in a safe place. If you remove the Module at any time, you must replace the blanking plate to prevent dust and debris entering the Switch and to aid the circulation of cooling air.

4Hold the Module so that the text on the front panel is upright, and insert it into the Switch, ensuring the back panel is flush against the back of the Switch. Tighten the three captive thumbscrews securing the Module with a suitable tool.

5To activate the Module:

a Ensure that the Switch is powered-up.

b Remove the protective plastic covers from the fiber connections on the Module.

c Plug the MT-RJ connector on the fiber cable into the fiber port on the Module.

d Connect the other end of the fiber optic cable to a device fitted with a 1000BASE-SX Gigabit Ethernet connection.

6Check the LEDs on the front of the Switch and the rear of the Module to ensure that the Module is operating correctly. Refer to “LEDs” below for more information.

Removing the Module from a Switch

1Ensure that the power supply and the fiber backbone connection cables are disconnected from the Switch.

2Place the Switch on a flat surface. Undo the three captive thumbscrews securing the Module into the Switch. Do not remove any other screws from the Switch.

3If you are not fitting another Module immediately, replace the blanking plate to ensure that dust and debris do not enter the Switch and to aid the circulation of cooling air.

LEDs

You can gather information about the status of the Module and its packet activity using the Expansion Module LEDs on the front of the Switch and the Port LEDs on the rear of the Module.

Expansion Module Activity LED (Switch)

Status	Color	Meaning
On	Amber	Packets are being transmitted or received
		on the Module.
Off	No color	There are no packets being transmitted or
		received on the Module.
Expansion Module Status LED (Switch)
Status	Color	Meaning
On	Green	N/A (cannot report status of all ports
		together).
Off	No color	The Module is not installed.
Flashing	Amber	The Module is installed but is not
		recognised (faulty or unsupported).
On	Amber	The Module is installed.
Port Activity LED (Module)
Status	Color	Meaning
On	Amber	Packets are being transmitted or received
		on this port.
Off	No color	There are no packets being transmitted or
		received on this port.
Port Status LED (Module)
Status	Color	Meaning
On	Green	A link is present and the port is enabled.
Off	No color	There is no link present.
Flashing	Green	A link is present and the port is disabled.

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