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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
Corrupted Software
If the Alert LED remains permanently on following power-up, it is possible
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.