Is there a guide, a how-to for connecting a Linksys SPA3102 with a Call Manager 7.x somewhere?

I'm connected to LINE 1 set to port 5060

Have been able to registered to call manager as a third party sip phone, can receive calls on the analog phone connected to line 1 but cannot figure out how to make it work for dialing out.

Everytime I get is a busy signal after dialing, I've played with the dial plan on the SPA3102, do I have to or is there a way to transfer all the intelligence to the call manager which has all our dialing rules already set up?

note: I'm pretty new to all the telephony gibberish, i'm surely missing something but the question is what!!

Please help.