Help From Costa Rica , with ZMA400p

Hi there.
i am experiment with FreePBX and i buy from my local dealer a XMA400P Card with a FXO module to connect one of my land line to the FreePBX in order to make some test and etc. How ever just install the card, and i use Elastix Elastix, recognize the card Perfect, but i dont now how to configure the card as a Trunk port si with my 2 Ip Phone Granstream make phone calls and use all the features of the PBX

Could any body please giveme a light where to go or what to read, or anybody can help me with mui situation.