Is it possible to do this?

Basically we have one computer in the middle room which has a wireless usb sprint aircard for internet connectivity.

The problem is i also want internet connectivity on my computer in my room. I have a phone cord that will reach both computers, is it possible for me to get internet access on my computer using a phone line. My ethernet cords won't reach into the other room, and I can't afford to buy a longer Ethernet cord right now.