We have a Wireless aironet 1200 series (well we have 3) but one of our routers are not working as such.
we have one on the ground floor that works perfectly that's powered by AC Adapter and one on the 1st floor powered by Ethernet, but the one on the 3rd floor also powered by Ethernet we cant gain access to it by the web interface.
I can access the ground floor and 1st floor but no luck with the 2nd floor which is still giving of a signal but its not giving out a IP address so its not connecting correctly.
By the way all 3 wireless routers are using the same SSID
I been trying to connect to the console but I dont have a RJ45 to DB9 adapter.
You should be able to tell if it's connected to the network via 'show cdp neighbor' command from a cisco device.
Have you tried to Telnet to the AP? It may be that the HTTP service is not enabled. When you say it's not giving out addresses do you mean DHCP addresses to the associated clients? Are you using a helper-address?
You could always brute force the device by doing a factory reset and then connect to it with a cross-over cable. I believe that the automous 1200 AP's default to 10.0.0.1 so as long as your PC is in the same subnet you should be able to use the web interface to reconfigure it.
If you cannot get into the AP through telnet, then manually reset the AP using the mode button. Just hold it in for 15-20 seconds until you see the middle light turn red. At that point the AP will be back to factory defaults and you can access it through telnet at 10.0.0.1
Hope this helps...and make sure to always have a spare RJ45-DB9 console cable handy. :)