Allied Telesis AT-WA7500 - Manual (Page 208)

8 - Managing, Troubleshooting, and Upgrading Access Points
208
The radio coverage is less than you expected it to be.
Verify that the antennas or antenna cables are plugged into the correct
connectors by reading the label on the access point.
Troubleshooting
the Radios
If you are having problems communicating with your wireless network,
you can use the access point LEDs, a serial connection, or the access
point to help you troubleshoot any radio problems.
Using LEDs
If the access point LEDs show the following pattern after it boots, the
radio may be faulty or the configuration matrix string is incorrect.
Contact your local Allied Telesyn representative to help you correct the
problem.
Using Radio MAC Ping (802.11b Radios)
Radio MAC Ping runs at the MAC sublayer of the Data Link layer, thus
allowing you to ping any 802.11b device that is connected to the access
point. Radio MAC Ping can help you determine the connectivity and
signal strength of an 802.11b radio.
Power Wireless
#1 Wireless
#2 Wired LAN Root/Error
ON OFF OFF ON ON