I setup up a basic point to point vpn using netgear fvs336g v3 firewalls. I went off the netgear setup options for this from there website. I can get both IP phones to connect to IP office at main site. Both phones show up in system status and I can ping both. My problem is that only one phone has dial tone. If I place a call from the working phone eventually the other phone will have dial and I can place call. Once I hang up both phones will work for a bit then the one phone with loose dial tone.