Remote 480i setup?

Hi
I am new to this. I followed this to setup my port forwarding on the ce end.

http://trixbox.org/wiki/how-configure-trixbox-remote-phones-compl...

I can connect to to my ce with SJPhone. Not sure but it may be using a stun server. I am now going to try to get an Aasrta 480i working. I think I may need to forward the tftp ports for the config also. Is that true or would that just try to config it for the internal network? I guess I would have to forward what ever ports the add on apps use too.

I think the above site may be trying to connect using an IAX2 trunk setup. If so does the phone need any other settings? Will this work?

Sorry for the noob Questions. I am using the version I downloaded last week and have done all the updates to date.

Thanks for your help.

Don

OK I took out the stun setting in SJPhone and it still connects. I also forwarded ports 3000 to 4000 and the 480i will not register. I think the settings are the same as the SJPhone. Any Ideas or a link to the 480i administrator guide?