3Com DIA3CV1100-02 manual describes the front panel VCN AC indicators and connectors

8Visitor and Community Network Access Concentrator Installation Guide

Table 1 describes the front panel VCN AC indicators and connectors.

Table 1 VCN AC Front Panel LEDs and Connectors

Item	Type	State	Used to
LAN	LED	Green	Indicate connection of the VCN AC
			to the Ethernet Switch.
LAN	RJ-45 port	-	Connect the VCN AC to the
			Ethernet Switch.
Line	LED	OFF	Indicate VCN AC is not connected
			to the line.
		Flashing Green	Indicate data transmission over the
			VDSL line.
Power	LED	OFF	Indicate that the VCN AC is not
			powered.
		Orange	Indicate that the power-on self-test
			failed if LED remains orange for
			more than 30 seconds.
		Green	Indicate that the unit is functional.
Local	4-pin	-	Connect ASCII terminal for
Management	MiniDin		monitoring and troubleshooting.
Access (LMA)	connectors		The cover must be removed to
	(hidden)		attain access to the hidden
			connectors. Refer to the Visitor and
			Community Network Access
			Concentrator for details about
			troubleshooting, monitoring and
			downloading software.

Safety Precautions Please follow these precautions before installing the Visitor and Community Network Access Concentrator:

WARNING: Do not plug in, turn on or attempt to operate an obviously damaged unit.

CAUTION: All servicing should be undertaken ONLY by qualified service personnel. There are no user serviceable parts inside the unit.

WARNING: Be sure to unplug the power supply cord from the wall socket before attempting to remove and/or replace the power supply.

CAUTION: Do not operate the unit in location where the maximum ambient temperature exceeds 40 degrees C.