Qwest does not support Linux but many of their support folks will try. Especially those who are more senior but these people take calls referred to them, by those who actually answer phones.
As for your task:
Use a NIC. Maybe I'm archane but NICs are meant for network connections -- that's why they are NICs. Despite how robust USB support is, on Linux, if you stick to following a rule like this one, getting off the ground with Linux will be easier. You can return to acrobatics later, once you're proficient at taking off and landing, safely.
You need to do the following, as root: (Forgive me if you know this already but do NOT use your web browser as root. This means, if you need to browse for info, be sure you don't go looking for it without changing who you are, as a user.)
Create the following file:
Put the following lines in it:
# next line only if not using DHCP; substitute the value with an IP that works for you
#default LAN address on ActionTec ADSL modems with qwest
Once the file is created, do this:
Redhats GUI for configuring NICs includes a number of parameters that are obsolete. Not all of those, above,
may be necessary but I don't recall, exactly, so I'd include all of them.
Redhat has a bad habit of hiding all the blood and guts behind guis. I dropped it for that reason. The reason for mentioning this is to add that, if you continue using it, whenever you get something set up with a GUI, make a note to return to it in order to find out what is really going on at the file and filesystem levels. This level is where you will find the beauty you've heard of, with respect to Linux. Having access to the file-level information is that beauty.
You may wish to go to the following URL and print the page, before doing the above stuff.
If you get an error saying that the box doesn't know what "eth0" is, you need to define the alias. There is some info on doing this, here:
Finally, remember that Google is everyone's friend. But, when you are new to Linux, it is your guardian angel. Try the following syntax:
"keyword1 keyword2 ... keywordN site:domainname.tld"
Remember too, to try the site search engine at this URL, first: