3Com 3CRWE52196 manual Alert LED, Recovering from

Alert LED 79

	centre of the network with Wireless computers distributed around it.
	Applications are generally available with the computer wireless card to
	carry out a site survey. Use this application to find the optimal siting
	for your wireless computer. Consult your Computer Card
	documentation and vendor for more details.
Alert LED	The Alert LED will flash when the Gateway unit is first powered up while
	the system software checks the hardware for proper operation. Once the
	Gateway has started normal operation, the Alert LED will go out.
	■ If the Alert LED does not go out following start up, but illuminates
	continuously, this indicates that the software has detected a possible
	fault with the hardware. Remove power from the Gateway, wait 10
	seconds and then re-apply power. If the Alert LED comes on
	continuously again, then a fault has been detected. Locate the copy of
	the Gateway software on the accompanying CD-ROM or 3Com web
	site (http://www.3com.com) and upload it to the Gateway to see if
	this clears the fault (refer to “Recovering from Corrupted Software”
	below). If this does not fix the problem, contact your supplier for
	further advice.
	■ During normal operation, you may notice the Alert LED lighting briefly
	from time to time. This indicates that the Gateway has detected a
	hacker attack from the Internet and has prevented it from harming
	your network. You need take no specific action on this, unless you
	decide that these attacks are happening frequently in which case you
	may wish to discuss this with your ISP. The Gateway logs such attacks,
	and this information is available through the Status and Logs screens.
Recovering from	If the Alert LED remains permanently on following power-up, it is possible

Corrupted Software that the system software has become corrupted. In this condition, the Gateway will enter a “recovery” state; DHCP is disabled, and the LAN IP address is set to 192.168.1.1. Follow the instructions below to upload a new copy of the system software to a Gateway unit in this state.

Ensure that one of your computers has a copy of the new software image file stored on its hard disk or available on CD-ROM.

The latest software is available on 3Com’s Web site at:

www.3com.com.