How to connect Linksys spa3102 to Digium AA50 s800i

Hello everyone,
I’m new to this forum and to asterisk so excuse me if I ask something stupid or if this post is in the wrong place (in this case I will move it):

I have a digium AA50 s800i (voip only version) wich I’d like to use with two normal telephon lines; the reseller told me that I could configure the Digium with two spa3102 to do it but I really don’t know how.

Can anybody give some advices or post some documentation?

Thanks in advance to everyone.