802.11n coexistence problems with neighboring using 802.11g

[guest]

How can you avoid 802.11n coexistence problems with neighboring businesses that use 802.11g (in multi-tenant office buildings, for example)?

In highly congested areas, neighboring WLANs may use 802.11a/b/g long after your own clients have been upgraded to 802.11n. Operating in greenfield mode not only makes you a bad neighbor -- it can cause numerous collisions that degrade the performance of your own WLAN.