U.S. based Ringcentral Cisco desk phone connecting to a Mac.

So I just received my Cisco SPA508G phone. I have a Mac. Due to wireless issues I am running a hardline from our internet providers modem > our router > my computer. How should I connect the phone to the internet AND the computer? Should the line running from the router go directly into the back of the phone, with the computer "jumped" off the phone? Or should I run the hard line to the computer then "jump" the phone off the computer? In either case which port does the computer and hard line plug into the phone? . I see an "SW" port and a "PC" port.