You have 2 network controllers, can't tell from here if one is the wireless device but even if it is, the fact that it is showing with the lspci command does not necessarily mean that it is installed properly or at all. You need the drivers installing/building properly, so first find them and follow the instructions to build, most likely a simple ./configure, make & make install from a suitable directory like /tmp or /usr/local. Then run
$ sudo ifconfig -a
and make sure you have an output like the eth0 one but appearing as
wlan0 or similar - then you should be ready to set up the connection
Go to the post on wireless setup
for RHEL to set it up, although the post is for wep/dhcp it should at least get you going.