SIP Trunking with Samsung OfficeServ 7000

I am trying to link up my asterik box to a sumsung OfficeServ 7000 box.

I been looking around the web for leads on how to do this without any luck.
Can someone point me in the right direction.

The sumsang office does support sip trunking.
I just need help for the SIP trunking so that any ext fom the astrisk box should be able to call any extension to the sumung box

thanks in advance.