Front Panel Connectors and LEDs

The front panel contains four ports with two port status LEDs assigned to each port. In addition, there is an Attention button (labeled ATTN) and two system-level LEDs located next to the ATTN button.

Figure 2 Front Face of the EM

Figure Legend

1 Port 0

2 Port 1

3 Port 2

4 Port 3

5 ATTN (attention) button

6 Attention LED

7 OK (power status) LED

8 Link LED

9 Activity LED

The following table explains how to interpret the behavior the activity and link LEDs.

LED	Color	State	Meaning
Activity	None	Off	Link is down.
	Green	Blinking	Activity is occurring on the link.
	Green	Steady on	No activity is occurring on the link.
Link	None	Off	Link is operating as a 10 Mbps oonnection.
	Green	Steady on	Link is operating as a 100 Mbps connection.
	Amber	Steady on	Link is operating as a gigabit connection (1000 Mbps).

When you want to perform a hot-plug operation with an EM, press the ATTN button. This removes power from the slot the EM is in so it can be removed while the chassis remains powered up.

Note - Power remains present at the slot for a period of time after the ATTN button is pressed. This is referred to as the power transition period.

Caution - Do not insert or remove the EM during the power transition phase of a hot-plug operation. This power transition phase is the period just after the ATTN button is pressed when the EM might not be fully isolated from the power source.

In addition to the port status LEDs, there are two LEDs next to the ATTN button. The following table explains their meaning.

LED	Color	State	Meaning	Allowed Action
OK (power status)	None	Off	All supply voltages (except Vaux) have been removed from the slot, except those required for card removal.	EM can be removed from the slot.
	Green	Blinking	Power transition/hot-plug operation is in progress.	EM cannot be removed.
	Green	Steady on	Power is present in the slot.	EM cannot be removed.
Attention	None	Off	Slot is operational.	This is the normal status when the slot is operating correctly.
	Amber	Blinking	LED has been activated by a user.	Note - The Attention LED is not used to report problems detected while validating a request for a hot-plug operation.
	Amber	Steady on	Slot needs attention.	The slot has an operational problem.

User's Guide

Front Panel Connectors and LEDs

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