I'm not sure if this has to do with the 802.11(a,b,g,n) standard, but the situation is this. We have a wireless network that supports all of these standards using several Cisco Aironet 1200 series APs. We also have a mix of HP NC6220, NC6400, and IBM T61 laptops. The NC6400's have ABG cards but only seem to connect on G unless you specify under the card properties to only use A. Once on A they work fine so I know the setup on the AP is correct. The same thing happens with the T61's which have AGN cards. They never connect to the 5GHz networks unless you tell them to specifically. We've spent the money on AP's with 2.4 and 5GHZ radios, but we only ever seem to use the 2.4 range. Just thought someone might know a tweek or reason for this.