Configuring Patton SN 4638 with freePBX

I have a Patton SN4638 BRI gateway which i would like to configure with my FreePBX and ISDN lines. I am not quite sure how to go about this, as far as i have found i must upload a config file generated from excel to the Patton gateway (as below link shows), but not sure what to do on FreePBX side.

does any one have any experience with setting up Patton Gateway with FreePBX?