Best was to set up application endpoint?

Hi,
I am switching over from trixbox to FreePBX and could use a little help. I’m using the asterisk box as a mid-point registrar to act as sort of a gateway for an endpoint application.

Previously I just set up 8 fake extensions in a group to forward all calls to this endpoint application. I was wondering if there was a better way to do this.

Thanks,
Brent