Hi dana3365, Sorry for the confusion. Intel Centrino Wireless-N 2230 is a single band wireless card it can connect only on 2.4 GHz band. 
I don't believe this is true, but was told by Dell Pro Support (Eric) that the above-referenced card can connect at 5ghz speeds. I, however, cannot. I have a Cisco/Linksys EA6900 with 2 separate named networks, 2 separate passwords. I've removed and reinstalled all software, hardware, etc, Can anyone tell me if I'm crazy, stupid, nuts, or am I justified. I spent 1 hr., 18 min., on the phone with tech support, but didn't get anywhere. I know the network is set up correctly because I can connect on my tablets and phones. I have AT&T uverse dsl with their gateway set up as a modem. Thanks for your help and advice.
Intel Centrino Wireless-n 2230