XFinity Network with SB6121 modem & belkin N150 router

[Maxineuh1]

How do I connect belkin n150 router to motorola sb6121 cabled modem on XFinity network and get all to work properly AND with a working wifi?
Belkin has more than enough ports, sb6121 nor the hp computer do not have additional slots to connect.
HELP!

 

[popatim]

Connect a network cable from the single jack on the back of the Motorola to the WAN jack on the back of the Belkin.
Power them on, Put the belkin setup disk in your computer and it should guide you the rest of the way.

ps - if you need the manual and don't have it :
http://www.belkin.com/networking/manual/MAN_F9K1001_8820-00773_RevA01_N150_Router.pdf