Indeed, connect CM to router, power on CM, wait for the sync light, power on router, wait for the power light to stop flickering, power on laptop.
Go to the autoreg page and register the CM on the network, then you can browse the internet.
Go to the 192. page and set up your router securely, remember to change the name and password needed to login.
Guidance on security is here.
http://www.cableforum.co.uk/board/article.php?a=12