Does your campus require you register MAC address?
You may try as the following:
1. connect the wall jack straight to your PC, then use ipconfig to pick up the IP address, subnet mask, default gateway, and DNS server. Take note of all these details.
2. connect the wall jack to the router's WAN port, and PC to the router's LAN port, then login to the router's configuration page. In most cases, the login address and login credentials can be found on the sticker attached on the router itself.
3. go through quick setup. choose static IP as WAN connection type, enter all the required details that you have written down before.
4. don't forget to reboot the router
5. try internet then, when required the campus credentials, enter that you get from campus.
Does this work?