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So many people, even people who work @ Apple in the Airport group, don't understand wifi.

Here is one anti-pattern for WiFi... run the APs co-channel. run them all on, say, channel 6.

Because in the 2.4GHz ISM band, given OFDM modulation, and the minimum standards set by the IEEE, there is really only one usable channel.

The adjacent channel interference problem is worse with 802.11n receivers, btw.

But if you run the APs co-channel, then CCA can work.

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I had to convince a former bosses boss of mine that this was the proper setup. He had setup the network when the company was tiny and explaining what needed to be changed when we grew to more than 10 times the users and 20 times the wifi devices was a lesson in convincing a brick wall. Getting all the best practices collected was not an easy task.

> there is really only one usable channel.

Can you elaborate on this a bit? I'm running all 802.11n hardware for my personal networks, but I troubleshoot g networks from time to time. I've never heard this assertion before.

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