Ok, So I have a Elastix box setup, everything is working... extensions, PSTN Gateway, all of it. EXCEPT when I try to take a phone off site. The phone shows "No Service" both on my Aastra 57i as well as my Pollycom 560, Now I know the E-box is setup 1to1 Nat, and the Phones that are offsite are on static ip's on a T-1. I have configured sip_nat.conf for nat: nat=yes externip=(outside IP of server) fromdomain-(Server Name) localnet=192.168.0.110/255.255.255.0 canreinvite=no and this is still not working. ANY SUGGESTIONS??????? Thanks ahead of time. BTW The phones can make calls out but they can't recieve calls if you call the extension it comes back busy.