3Com 3C10220 manual Test LED

Front Panel Connections and LEDs 13

Table 3 LED Behavior (continued)

Per-port Status Indications

Unit Power Status Indications

AC LED	DC LED
Off	Off	■ No AC power supply is plugged into the AC
		inlet and no redundant DC power supply is
		connected.
		or
		■ An AC power supply fault has occurred and
		no redundant DC power supply is
		connected.
On	Off	■ An AC power supply is plugged into the AC
		inlet and no redundant DC power supply is
		connected.
		or
		■ An AC power supply is plugged into the AC
		inlet, and a power failure has occurred on
		the redundant DC power supply that is
		connected.
Off	On	■ An AC power supply is not plugged into AC
		inlet and a redundant DC power supply is
		connected.
		or
		■ A main power supply fault has occurred
		and a redundant DC power supply is
		connected.
On	On	■ An AC power supply is plugged into AC
		inlet
		and
		■ A redundant DC supply is connected.
Self-Test Indications
TEST LED
Off		Normal condition
On		Self-test routine is in progress