Wireless is a pain to troubleshoot, especially in large areas.
What internet speeds do you get when you connect to the AT&T router via Ethernet? That is your gateway, so you are limited as to what you can do with regards to port forwarding, wireless extending, etc. The AirPort Extreme is a great router, but a large are may require multiple wifi repeaters to boost your signal sufficiently to get good coverage. Also, each person that connects to wifi takes a chuck of the wireless bandwidth the router has, so reducing your speed. This is more of an issue for networking.
Also, the AirPort Express being setup in Bridge Mode is correct. You can't bypass the 2Wire router as it is the modem/gateway. Test the internet speed directly connected to the 2Wire. If you are picking up strong wifi signal throughout your house, it might be the internet speed that is too slow. Realistically, 18 Mbps is too slow for 12-24 wifi devices.
Until the next time… And if I help you out, give me a "Thanks!" Thanks!
2012-10-11 09:27 PM