I have an obi202 I am wanting to use as a trunk provider to my PIAF box since GV is kinda iffy going straight to PIAF right now. Following the tutorial here: http://nerdvittles.com/?p=25846 I see they use SP2 for the trunk for PIAF to talk to it. My problem is I have 3 GV #'s I need to put on the obi202: 2 of them need to ring through to the PIAF box and 1 needs to go to the POTS line to go to a fax. Is this possible? Do I really only need one trunk (SP2) going to the PIAF box or will I need one trunk per GV #?